Danfoss VLT 2800 Series, VLT 2822, VLT 2805-2815, VLT 2803-2815, VLT 2840 General Information Manual

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Contents

VLT® 2800 Series

Introduction to VLT 2800

Software version 3

High voltage warning 4

These rules concern your safety. 4

Warning against unintended start 4

Installation

Mechanical dimensions 6

Mechanical installation 10

General information about electrical installation 11

EMC-correct electrical installation 12

Grounding of shielded/armored control cables 13

Diagram 14

Electrical installation 15

Safety clamp 17

Prefuses 17

AC line connection 17

Motor connection 18

Direction of motor rotation 19

Motor thermal protection 19

Parallel connection of motors 19

Motor cables 19

Brake connection 20

Ground connection 20

Load sharing 20

Tightening Torque, Power Terminals 21

Calculation of brake resistance 21

Access to control terminals 21

Electrical installation, control circuitry 21

Tightening torques, control cables 22

Electrical installation, control terminals 22

Relay connection 23

VLT Software Dialog 23

Connection examples 24

Control unit 26

Manual initialization 26

Automatic motor tuning 27

Display readout 29

Hand Auto 29

Warnings/alarms 30

Special conditions 31

Temperature-related switching frequency 31

Derating for long motor cables 31

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VLT® 2800 Series

VLT 2800 start-up 31

Programming

Operation & Display 33

Load and Motor 41

References & Limits 52

Inputs and Outputs 59

Special functions 69

Enhanced Sleep Mode 79

Serial communication 84

Technical functions 93

All about VLT 2800

Warnings/alarm messages 98

Warning words, extended status words and alarmwords 102

Special conditions 103

Extreme environments 103

Galvanic Isolation (PELV) 103

UL Standard 104

General technical data 105

Technical data, mains supply 1 x 220 - 240 V/3 x 200-240V 110

Technical data, mains supply 3 x 380 - 480 V 111

Available literature 112

Supplied with the unit 112

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VLT® 2800 Series

VLT 2800

Instruction Manual

Software version: 3.1x

This Design Guide can be used for all VLT 2800 series adjustable frequency drives with software version 3.1x. The software version number is indicated in parameter 640.

Warning It can be extremely dangerous to touch the electrical parts, even when the line supply has been disconnected. Also ensure that other voltage inputs are disconnected from load sharing through the DC bus. Wait at least 4 minutes after the input power has been removed before servicing the drive.

Introduction to VLT 2800

MG.27.A2.22 - VLT® is a registered Danfoss trademark 3

VLT® 2800 Series

High voltage warning

The voltage of the frequency converter is dangerous whenever the converter is connected to mains. Incorrect fitting of the motor or frequency converter may cause damage to the equipment, serious injury or death. Consequently, it is essential to comply with the instructions in this manual as well as local and national rules and safety regulations.

The Protective Extra Low Voltage (PELV) requirements stated in IEC 61800-5-1 are not fulfilled at altitudes above 2000 m (6562 ft.). For 200V frequency converters the requirements are not fulfilled at altitudes above 5000 m (16 404 ft.). Please contact Danfoss Drives for further information.

These rules concern your safety.

1. The adjustable frequency drive must be disconnected from AC line if repair work is to be carried out. Ensure that the line supply has been disconnected and that the prescribed time has passed before removing motor and AC line plugs.

2. The [STOP/RESET] key on the control panel of the adjustable frequency drive disconnect the equipment from line power and is therefore not to be used as a safety switch.

does not

tion of the motor, class 20, in accordance with NEC.

6. Do

7. Note that the adjustable frequency drive has

Warning against unintended start

1. The motor can be brought to a stop by means

2. While parameters are being changed, the

3. A motor that has been stopped may start if

not remove either the plugs for the motor or line supply while the adjustable frequency drive is connected to line power. Ensure that the line supply has been disconnected and that the prescribed time has passed before removing motor and AC line plugs.

more voltage inputs than L1, L2 and L3 when the DC bus terminals are used. Check that all voltage inputs are disconnected and that the prescribed time has passed before repair work is commenced.

of digital commands, bus commands, references or a local stop, while the frequency converter is connected to mains. If personal safety considerations make it necessary to ensure that no unintended start occurs, stop functions are not sufficient.

motor may start. Consequently, [STOP/RESET] must always be activated, following which data can be modified.

faults occur in the electronics of the frequency converter, or if a temporary overload or a fault in the supply mains or the motor connection ceases.

the stop key

these

3. The unit must be properly grounded, the user must be protected against the supply voltage, and the motor must be protected against overloading in accordance with prevailing national and local regulations.

4. The ground leakage currents are higher than

3.5 mA.

5. Protection against motor overload is not included in the factory setting. If this function is required, set parameter 128 Motor thermal

protection to data value ETR trip or data value ETR warning. For the North American market:

The ETR functions provide overload protec-

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VLT® 2800 Series

Motor overload protection

The electronic thermal relay (ETR) in UL listed VLTs provides Class 20 motor overload protection in accordance with the NEC in single motor applications when parameter 128 is set for "ETR TRIP" and pa-

rameter 105 Motor current is set for the rated motor current.

Introduction to VLT 2800

MG.27.A2.22 - VLT® is a registered Danfoss trademark 5

VLT® 2800 Series

Mechanical dimensions

The drawings below describe the mechanical dimensions. All dimensions are given in mm.

NOTE

Please note that all filter options must be vertically mounted.

VLT 2803-2815 200-240 Volt VLT 2805-2815 380-480 Volt

The drawing below gives the mechanical dimensions of VLT 2822 (3 HP) 200-240 Volts and VLT 2822-2840 (3 - 5 HP) 380-480 Volts. All dimensions are in inches.

VLT 2822 220 - 240 V, PD2 VLT 2840 200 - 240 Volt VLT 2855-2875 380 - 480 Volt

VLT 2840 220 - 240 V, PD2 VLT 2880-82 380 - 480 V

VLT 2822 200-240 Volt VLT 2822-2840 380-480 Volt

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VLT® 2800 Series

Motor coils (195N3110)

RFI 1B filter (195N3103)

Terminal cover

The drawing below gives the dimensions for NEMA 1 terminal covers for VLT 2803-2875. Dimension 'a' depends on the unit type.

Installation

IP 21 solution

MG.27.A2.22 - VLT® is a registered Danfoss trademark 7

VLT® 2800 Series

Dimensions

Type Code number A B C VLT 2803-2815 200-240 V, VLT 2805-2815 380-480 V 195N2118 47 80 170 VLT 2822 200-240 V, VLT 2822-2840 380-480 V 195N2119 47 95 170 VLT 2840 200-240 V, VLT 2822 PD2, TR1 2855-2875 380-480 V TR1 2880-2882 380-480 V, VLT 2840 PD2 195N2126 47 205 245

EMC filter for long motor cables

195N2120 47 145 170

192H4719

8 MG.27.A2.22 - VLT® is a registered Danfoss trademark

192H4720

VLT® 2800 Series

Installation

192H4893

MG.27.A2.22 - VLT® is a registered Danfoss trademark 9

VLT® 2800 Series

Mechanical installation

The adjustable frequency drive is cooled by air circulation. For proper cooling, allow a minimum of 4 inches (100 mm) of open space above and below the unit. To protect the unit from overheating, ensure that both the ambient temperature and the 24-hour average temperature are not exceeded. The maximum temperature and 24-hour average are listed in General technical data in this manual. If the ambient temperature is in the range of 113°F - 131°F (45°C - 55°C), derating of the drive must be carried out. See Derating for ambient temperature in this manual. The service life of the unit will be reduced without applicable derating.

The requirements that apply to enclosures and remote mounting must be complied with to avoid serious injury or equipment damage, especially when installing large units.

Enclosures

In the USA and some other countries, a NEMA 1 terminal cover enclosing terminal connectors is required if the drive is not installed within another enclosure.

Side-by-side

All VLT 2800 units can be installed side-by-side and in any position, as the units do not require ventilation on the side.

Spacing for mechanical installation

All units require a minimum of 4 in of air from other components above and below the enclosure.

NOTE

With the IP 21 solution all units require a minimum of 4 in air on each side. This means that side-by-side mounting is allowed.

not

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VLT® 2800 Series

General information about electrical installation

High voltage warning

The voltage of the adjustable frequency drive is dangerous whenever the drive is connected to the AC line. Incorrect installation of the motor or drive may cause damage to the equipment, serious injury or death. Comply with the safety instructions in this manual as well as local and national rules and safety regulations. Touching electrical parts may be fatal even after the equipment has been disconnected from the AC line. Wait at least 4 minutes for current to dissipate.

NOTE

It is the responsibility of the user or installer to ensure correct grounding and protection in accordance with national and local standards.

High voltage test

A high voltage test can be performed by short-circuiting terminals U, V, W, L1, L2 and L3, and applying a max. of 2,160 V DC in 1 sec. between this short-circuit and terminal 95.

Do not perform a high voltage test between the control terminals and the chassis, because the voltage potential of the control card cannot exceed approximately 100 volts with respect to chassis due to a voltage limiting circuitry. The terminals are protected against direct hazardous access through barriers.

Installation

Earthing

Comply with the following at installation:

• Safety earthing: The drive has a high leakage current and must be earthed properly for safety. Follow all local safety regulations.

• High frequency earthing: Keep earthing connections as short as possible.

Connect all earthing SYSTEMs to ensure the lowest possible conductor impedance. The lowest possible conductor impedance is achieved by keeping the conductor as short as possible and by grounding with the greatest possible surface area. If multiple drives are installed in a cabinet, the cabinet backplate, which must be made of metal, should be used as a joint earth reference plate. The drives must be fitted to the backplate at the lowest possible impedance.

To achieve low impedance, connect the drive to the backplate with the drive fastening bolts. Remove all paint from the contact points.

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VLT® 2800 Series

EMC-correct electrical installation

General points to be observed to ensure EMC-correct electrical installation.

Use only shielded/armoured motor cables

and shielded/armoured control cables.

Connect the screen to ground at both ends.

Avoid installation with twisted shield ends

(pigtails), since this ruins the shielding effect at high frequencies. Use cable clamps instead.

It is important to ensure good electrical con-

tact from the installation plate through the installation screws to the metal cabinet of the variable frequency drive.

Use starwashers and galvanically conductive

installation plates.

Do not use unshielded/unarmoured motor

cables in the installation cabinets.

The illustration below shows EMC-correct electrical installation, in which the variable frequency drive has been fitted in an installation cabinet and connected to a PLC.

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Grounding of shielded/armored control cables

In general, control cables must be shielded/armored, and the shield must be connected to the unit's metal cabinet with a cable clamp at each end.

The drawing below shows the correct way to perform the grounding, and what to do when in doubt.

Correct grounding

Control cables and cables for serial communication must be attached with cable clamps at both ends to ensure the maximum possible electrical contact.

Incorrect grounding

Do not use twisted shield ends that are plaited together (pigtails), as these increase shield impedance at higher frequencies.

Protection with respect to ground potential between the PLC and VLT

If the ground potential between the VLT adjustable frequency drive and the PLC, etc. is different, electric noise may occur that will disturb the whole system. This problem can be solved by fitting an equalizing cable next to the control cable. Minimum cable cross-

section: 0.025 in

[16 mm2].

VLT® 2800 Series

Installation

In the event of a 50/60 Hz ground loop

If very long control cables are used, 50/60 Hz ground loops can arise, and these can interfere with the whole system. This problem is resolved by attaching one end of the shield to the ground via a 100 nF capacitor (short pin length).

MG.27.A2.22 - VLT® is a registered Danfoss trademark 13

Diagram

* Integrated 1A RFI filter and brake is an option. ** VLT 2803-2815 200-240 V is not supplied with intermediate circuit coils.

VLT® 2800 Series

14 MG.27.A2.22 - VLT® is a registered Danfoss trademark

Electrical installation

See also the section Brake Connection.

VLT® 2800 Series

Installation

VLT 2822 200-240 V, 2822-2840 380-480 V

VLT 2803-2815 200-240 V, 2805-2815 380-480 V

MG.27.A2.22 - VLT® is a registered Danfoss trademark 15

VLT® 2800 Series

VLT 2840 200-240 V, VLT 2822 PD2, 2855-2875 380-480 V

VLT 2880-2882 380-480 V, VLT 2840 PD2

Please note that the units will be supplied with two bottom plates, one for metric glands and one for conduits.

16 MG.27.A2.22 - VLT® is a registered Danfoss trademark

VLT® 2800 Series

Safety clamp

To maintain the galvanic isolation (PELV) between the control terminals and high-voltage terminals, the accompanying safety clamp must be attached to VLT 2803-2815, 200-240 V, and VLT 2805-2815, 380-480 V. Attach the safety clamp to the strain relief plate with the two screws provided.

For all unit types, external prefuses must be fitted in the line supply to the adjustable frequency drive. For UL/cUL applications with a line voltage of 200-240 Volt, use prefuses type Bussmann KTN-R (200-240 Volt) or Ferraz Shawmut type ATMR (max. 30A). For UL/cUL applications with a line voltage of 380-480 Volt, use prefuses type Bussmann KTS-R (380-480 Volt).

Prefuses for UL application /cUL

Prefuses

Alternative fuses 380-500 V drives VLT 2800 Bussmann

2805-

2820

2855-

2875

2880-

2882

Alternative Fuses 200-240 V drives

VLT 2800 Bussmann

2803-2822 KTN-R20 JKS-20 JJN-20 5017906-020KLS-R20 ATM-R25 A6K-20R

2840 KTN-R25 JKS-25 JJN-25 5017906-025KLS-R25 ATM-R20 A6K-25R

E52273

RK1/JDDZ J/JDDZ T/JDDZ CC/JDDZ CC/JDDZ CC/JDDZ RK1/JDDZ RK1/JDDZ CC/JDDZ RK1/JDDZ

KTS-R20 JKS-20 JJS-20 FNQ-R-20 KTK-R-20 LP-CC-20 5017906-020KLS-R20 ATM-R25 A6K-20R

KTS-R25 JKS-25 JJS-25 5017906-025KLS-R25 ATM-R20 A6K-25R

KTS-R50 JKS-50 JJS-50 5014006-050KLS-R50 - A6K-50R

E52273

RK1/JDDZ J/JDDZ T/JDDZ RK1/JDDZ RK1/JDDZ CC/JDDZ RK1/JDDZ

Bussmann E4273

SIBA E180276

Little Fuse E81895

FerrazShawmut E163267/ E2137

Installation

AC line connection

All drives that are equipped with an RFI filter cannot be connected to a grounded DELTA or IT mains/AC line system.

NOTE

Check that the AC voltage matches the voltage rating of the drive. The drive rating is on the drive nameplate. See Technical data in this manual for correct dimensioning of cable cross-section.

For single phase 220-240 Volts input, attach the neutral wire to terminal N to terminal L1

No.N

(L2)L1(L1) (L3)

N L1

(L1)

and connect the phase wire

(L2)

AC line voltage 1 x 220-240 V

No.95 Ground connection

No.N

(L2)L1(L1) (L3)

L2 L1 L3

AC line voltage 3 x 220-240 V

No.95 Ground connection

No.91 92 93 AC line voltage 3 x 380-480 V

L1 L2 L3

No.95 Ground connection

380-460 Volt units with RFI-filters may not be connected to AC line supplies in which the voltage between phase and ground is more than 300 Volts. Please note that for the AC line for IT and the delta ground the AC line voltage can exceed 300 Volts between phase and ground. Units with type code R5 can be connected

MG.27.A2.22 - VLT® is a registered Danfoss trademark 17

to mains supplies with up to 400 V between phase and ground.

See Technical data for correct dimensioning of cable cross-section.

Motor connection

Connect the motor to terminals 96, 97, 98. Connect ground to terminal 99.

96 97 98 Motor voltage 0-100% of line

No.

voltage.

U V W

U1W2V1U2W1V2 6 wires out of motor, Delta-con-

U1 V1 W1 6 wires out of motor, Star-con-

3 wires of motor

nected

nected U2, V2, W2 to be interconnected separately (optional terminal block)

VLT® 2800 Series

No. PE Ground connection

See Technical data for correct dimensioning of cable cross-section.

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VLT® 2800 Series

All types of three-phase asynchronous standard motors can be connected to an adjustable frequency drive. Normally, small motors are star-connected (230/400 V, / Y), while large motors are delta-con- nected (400/690 V, / Y). The correct connection mode and voltage can be read from the motor nameplate.

NOTE

In motors without phase insulation paper, an LC filter should be fitted on the output of the adjustable frequency drive.

Direction of motor rotation

To change the direction of motor rotation, switch any two phases at the drive output or at motor terminals.

Motor thermal protection

The electronic thermal relay in UL approved variable frequency drives has received the UL approval for single motor protection, when parameter 128 Motor ther- mal protection has been set for ETR Trip and parameter 105 Motor current, I

has been program-

M, N

med to the rated motor current (see motor nameplate).

The adjustable frequency drive is able to control several motors connected in parallel. If the motors are to have different rpm values, use motors with different rated rpm values. Motor rpm is changed simultaneously, which means that the ratio between the rated rpm values is maintained across the range. The total current consumption of the motors is not to exceed the maximum rated output current I

for the adjustable

INV

frequency drive.

Problems may arise at the start and at low rpm values if the motor sizes are widely different. This is because the small motors' relatively high ohmic resistance in the stator calls for a higher voltage at the start and at low rpm values.

In systems with motors connected in parallel, the electronic thermal relay (ETR) of the adjustable frequency drive cannot be used as motor protection for the individual motor. For this reason, further motor protection must be used, such as thermistors in each motor or an individual thermal relay, for example (circuit breakers are not a suitable means of protection).

NOTE

Parameter 107 Automatic motor adaptation, AMT cannot be used when motors

are connected in parallel. Parameter 101

Torque characteristic must be set to Special motor characteristics [8] when motors

are connected in parallel.

Motor cables

See Technical data for correct dimensioning of motor cable cross-section and length. Always comply with national and local regulations on cable cross-section.

Installation

Parallel connection of motors

NOTE

If an unshielded/unarmored cable is used, some EMC requirements are not complied with, see EMC test results in the Design Guide.

If the EMC specifications regarding emissions are to be complied with, the motor cable must be shielded/ armored unless otherwise stated for the RFI filter in question. It is important to keep the motor cable as short as possible so as to reduce the noise level and leakage currents to a minimum. The motor cable shield must be connected to the metal cabinets of the adjust-

MG.27.A2.22 - VLT® is a registered Danfoss trademark 19

VLT® 2800 Series

able frequency drive and the motor. The shield connections are to be made with the largest possible surface area (cable clamp). This is enabled by different installation devices in different adjustable frequency drives. Connecting with twisted shield ends (pigtails) is to be avoided, as these spoil the shielding effect at high frequencies. If it is necessary to break the shield to install a motor isolator or motor relay. The shield must be continued at the lowest possible HF impedance.

Brake connection

NOTE

Voltages up to 850 VDC occur on the terminals.

81 82 Brake resistor

No.

R- R+

terminals

Connect the brake resistor wiring to drive terminals 81 and 82. The connection cable to the brake resistor must be shielded/armored. Connect the shield to both the ground of the drive and the brake resistor by means of cable clamps. Dimension the cross-section of the brake cable to match the brake torque.

Ground connection

Since the leakage currents to ground may be higher than 3.5 mA, the adjustable frequency drive must always be connected to ground in accordance with applicable national and local regulations. To ensure that the ground cable has good mechanical connection to terminal 95, the cable cross section must be a mini-

mum 7 AWG (10 mm

). To improve protection even further, a Recidual Current Device (RCD) can be fitted to ensure that the adjustable frequency drive cuts out when the leakage currents get too high. Also see RCD Application note MN.90.GX.02.

Load sharing

Load sharing provides the facility to connect several frequency converters' DC intermediate circuits. This requires that the installation is extended using extra fuses and AC coils (see drawing below). For load sharing parameter 400 Brake function must be set to Load sharing [5]. Use 6.3 mm Faston Plugs for DC (Load Sharing). Contact Danfoss or see instructions no. MI.50.NX.02 for further information.

88 89 Loadsharing

No.

- +

20 MG.27.A2.22 - VLT® is a registered Danfoss trademark

Note that voltage levels of up to 850 V DC may occur between terminals 88 and 89.

Tightening Torque, Power Terminals

Power and ground terminals must be tightened with the following torques:

VLT 28032875 28802882, 2840 PD2

Terminals Torque [Nm] Power AC line brake 0.5-0.6 Ground 2-3 Power AC line brake 1.2-1.5 Ground 2-3

VLT® 2800 Series

Installation

NOTE

This application is only for lifting/lowering without a counterbalance.

Access to control terminals

All control terminals are located underneath the protective plate on the front of the adjustable frequency drive. Remove the protective plate by sliding it downwards (see drawing).

Calculation of brake resistance

In lifting/lowering applications you need to be able to control an electromagnetic brake. The brake is controlled using a relay output or digital output (terminal

46). The output must be kept closed (voltage-free) for the period of time during which the variable frequency drive is not able to 'support' the motor, for example due to the load being too great. Select Mechanical brake control in parameter 323 or 341 for applications with an electromagnetic brake. When the output frequency exceeds the brake cut out value set in par. 138, the brake is released if the motor current exceeds the preset value in parameter 140. When stopping the brake is engaged when the output frequency is less than the brake engaging frequency, which is set in par. 139. If the variable frequency drive is placed at alarm status or in an overvoltage situation the mechanical brake is cut in immediately.

Electrical installation, control circuitry

NOTE

Using unshielded/unarmored cable may not comply with some EMI/RFI requirements.

MG.27.A2.22 - VLT® is a registered Danfoss trademark 21

Control wires must be shielded/armored. Connect the shield to the drive chassis with a clamp. Normally, the

VLT® 2800 Series

shield must also be connected to the chassis of the controlling device. (See the instructions for the specific device.) In analog signals or connections using very long wires, 50/60 Hz ground loops may occur because of noise transmitted from the AC line. It may be necessary to break the shield and insert a 100 F capacitor between the shield and the chassis.

Tightening torques, control cables

Control wires must be connected with a tightening torque of 0.22-0.25 Nm.

Electrical installation, control terminals

See section entitled Grounding of shielded/armored control cables in the VLT 2800 Design Guide for the

correct termination of control cables.

22 MG.27.A2.22 - VLT® is a registered Danfoss trademark

VLT® 2800 Series

No. Function 01-03 Relay outputs 01-03 can be used for

indicating status and alarms/warnings. 12 24 V DC voltage supply. 18-33 Digital inputs. 20, 55 Common frame for input

and output terminals. 42 Analog output for displaying frequency,

reference, current or torque. 46

Digital output for displaying status,

warnings or alarms, as well as

frequency output. 50 +10 V DC supply

voltage for potentiometer or thermistor. 53 Analogue voltage input 0-10 V DC. 60 Analogue current input 0/4 - 20 mA. 67

+ 5 V DC supply voltage

to Profibus. 68, 691RS-485, Serial communication. 70

Frame for terminals 67, 68 and 69.

Normally, this terminal is not to be used.

1. The terminals are not valid for DeviceNet/CANopen. See also the DeviceNet manual, MG.90.BX.YY for further details.

Profibus DIP switches setting

The dip switch is only on the control card with Profibus DP communication. The switch position shown is the factory setting. Switches 1 and 2 are used as cable termination for the RS-485 interface. If the adjustable frequency drive is located as the first or last (or only) unit in the bus system, switches 1 and 2 must be ON. On the remaining adjustable frequency drives, switches 1 and 2 must be OFF. Switches 3 and 4 are not applied.

VLT Software Dialog

Connection to terminals 68-70 or Sub D:

PIN 3 GND

PIN 8 P-RS 485

PIN 9 N-RS 485

Sub D plug

Installation

Relay connection

See parameter 323 Relay output for programming of relay output.

01 - 02 1 - 2 make (normally open)

Nr.

01 - 03

1 - 3 break (normally closed)

NOTE

Please note that the cable jacket for the relay must cover the first row of control card terminals - otherwise the galvanic isolation (PELV) cannot be maintained. Max. cable diameter: 4 mm. See drawing.

An LCP 2 control unit can be connected to the Sub D plug on the control card. Ordering number: 175N0131. The LCP control unit with ordering number 175Z0401 is not to be connected.

MG.27.A2.22 - VLT® is a registered Danfoss trademark 23

VLT® 2800 Series

Connection examples

Start/stop

Start/stop using terminal 18 and coasting stop using terminal 27.

Par. 302 Digital input = Start [7]

Par. 304 Digital input = Coasting stop inver- ted [2]

For Precise start/stop the following settings are made:

Par. 302 Digital input = Precise start/stop [27]

Par. 304 Digital input = Coasting stop inver- ted [2]

Speed up/slow down

Speed up/slow down using terminals 29/33.

Par. 302 Digital input = Start [7]

Par. 303 Digital input = Freeze reference [14]

Par. 305 Digital input = Speed up [16]

Par. 307 Digital input = Slow down [17]

Potentiometer reference

Voltage reference via a potentiometer.

Pulse start/stop

Pulse start using terminal 18 and pulse stop using terminal 19. In addition, the jog frequency is activated via terminal 29.

Par. 302 Digital input = Pulse start [8]

Par. 303 Digital input = Stop inverted [6]

Par. 304 Digital input = Coasting stop inver- ted [2]

Par. 305 Digital input = Jog [13]

Par. 308 Analog input = Reference [1]

Par. 309 Terminal 53, min. scaling = 0 Volt

Par. 310 Terminal 53, max. scaling = 10 Volt

Connection of a 2-wire transmitter

Connection of a 2-wire transmitter as feedback to terminal 60.

24 MG.27.A2.22 - VLT® is a registered Danfoss trademark

Par. 314 Analog input = Feedback [2]

Par. 315 Terminal 60, min. scaling = 4 mA

Par. 316 Terminal 60, max. scaling = 20 mA

VLT® 2800 Series

Installation

MG.27.A2.22 - VLT® is a registered Danfoss trademark 25

VLT® 2800 Series

Control unit

On the front of the variable frequency drive there is a control panel.

The control panel is divided into five functional groups:

1. Status LED

2. Keys for changing parameters and shifting display function.

3. LEDs.

4. Keys for local operation.

The [CHANGE DATA] key is also used for confirming a change of parameter settings.

[+] / [-] are used for selecting parameters and for changing parameter values. These keys are also used in Display mode for selecting the display of an operating value.

The [QUICK MENU] + [+] keys must be pressed at the same time to give access to all parameters. See Menu

mode.

[STOP/RESET] is used for stopping the connected motor or for resetting the variable frequency drive after a trip. Can be selected as Active [1] or Not active [0] via parameter 014 Local stop/reset. In Display mode, the display will flash if the stop function is activated.

NOTE

If the [STOP/RESET] key is set at Not active [0] in parameter 014 Local stop/reset,and there is no stop command via the

digital inputs or serial communication, the motor can only be stopped by disconnecting the electrical voltage to the variable frequency drive.

[START] is used for starting the variable frequency drive. It is always active, but the [START] key cannot override a stop command.

All displays of data are in the form of a six-digit LED display capable of showing one item of operating data continuously during normal operation. As a supplement to the display, there are three LEDs for indication of electrical connection (ON), warning (WARNING) and alarm (ALARM). Most of the variable frequency drive's parameter Setups can be changed immediately via the control panel, unless this function has been programmed as Locked [1] via parameter 018 Lock for data changes.

Control keys

[QUICK MENU] allows access to the parameters used

for the Quick menu. The[QUICK MENU] key is also used if a change to a parameter value is not to be implemented. See also [QUICK MENU] + [+].

[CHANGE DATA] is used for changing a setting.

26 MG.27.A2.22 - VLT® is a registered Danfoss trademark

Manual initialization

To manually initialize the adjustable frequency drive to factory default settings, first disconnect AC line voltage. Hold the [QUICK MENU] and [+] and [CHANGE DATA] keys down while simultaneously reconnecting the AC line voltage. Release the keys. The drive has now been programmed for factory settings.

Display readout states

Display mode

VLT® 2800 Series

In normal operation, one item of operating data can be displayed continuously at the operator's discretion. By means of the [+/-] keys, the following options can be selected in Display mode:

Output frequency [Hz]

Output current [A]

Output voltage [V]

Intermediate circuit voltage [V]

Output power [kW]

Scaled output frequency f

x p008

out

Menu mode

In order to enter the Menu mode, [QUICK MENU] + [+] must be activated at the same time. In Menu mode, most of the adjustable frequency drive parameters can be changed. Scroll through the parameters using the [+/-] keys. While scrolling in the Menu mode proceeds, the parameter number will flash.

The display shows that in parameter 128 Motor thermal protection, the selection made is Thermistor trip [2].

Quick menu

Using the [QUICK MENU] key, it is possible to access the 12 most important parameters of the adjustable frequency drive. After programming, the adjustable frequency drive is, in most cases, ready for operation. When the [QUICK MENU] key is activated in Display mode, the Quick menu starts. Scroll through the quick menu using the [+/-] keys and change the data values by first pressing [CHANGE DATA] and then changing the parameter value with the [+/-] keys. TheQuick menu parameters are:

•

Par. 100 Configuration

•

Par. 101 Torque characteristic

•

Par. 102 Motor power P

•

Par. 103 Motor voltage U

•

Par. 104 Motor frequency f

•

Par. 105 Motor current I

M,N

Installation

The display shows that the setting in parameter 102

Motor power P

is 0.75. In order to change the value

M,N

of 0.75, [CHANGE DATA] must first be activated; the parameter value can then be changed using the [+/-] keys.

If a given parameter display shows three dots to the right, it means that the parameter value has more than three digits. In order to see the entire value, activate [CHANGE DATA].

•

Par. 106 Rated motor speed n

•

Par. 107 Automatic motor adaptation

•

Par. 202 Output frequency high limit f

•

Par. 203 Reference range

•

Par. 204 Minimum reference Ref

•

Par. 205 Maximum reference Ref

•

Par. 207 Ramp-up time

•

Par. 208 Ramp-down time

•

Par. 002 Local/remote operation

•

Par. 003 Local reference

M,N

MAX

MIN

MAX

Parameter 102 - 106 can be read out from the motor's nameplate.

Automatic motor tuning

Automatic motor tuning (AMT) is performed as follows:

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In parameter 107 Automatic motor tuning, select data value [2]. "107" will now flash, and "2" will not flash.

2. AMT is activated by pressing start. "107" will now flash and dashes will move from left to right in the data value field.

3. When "107" appears once more with the data value [0], AMT is complete. Press [STOP/ RESET] to save the motor data.

4. "107" will then continue to flash with the data value [0]. You can now proceed.

NOTE

VLT 2880-2882 do not have AMT function.

VLT® 2800 Series

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VLT® 2800 Series

Display readout

The variable frequency drive shows the present output frequency in Hertz [Hz].

The variable frequency drive shows the present output current in Amps [A].

The variable frequency drive shows the present output voltage in Volt [V].

The variable frequency drive shows the intermediate circuit voltage in Volt [V].

The variable frequency drive shows the calculated output in kilowatt [kW].

notrun

This message is shown if an attempt is made to change a parameter value while the motor is running. Stop the motor to change the parameter value.

LCP

This message is shown if an LCP 2 control unit is fitted and the [QUICK MENU] or [CHANGE DATA] key is activated. If an LCP 2 control unit is fitted you can only change parameters with that.

The variable frequency drive shows the present Hand mode reference frequency in Herz (Hz).

The variable frequency drive shows scaled output frequency (the present output frequency x parameter

008).

Hand Auto

During normal operation the adjustable frequency drive is in auto mode, where the reference signal is given externally, analog or digital via the control terminals. However, in hand mode, it is possible to give the reference signal locally via the control panel.

On the control terminals, the following control signals will remain active when hand mode is activated:

• Hand Start (LCP2)

• Off Stop (LCP2)

• Auto Start (LCP2)

• Reset

• Coasting Stop Inverse

• Reset and Coasting Stop Inverse

• Quick Stop Inverse

• Stop Inverse

• Reversing

• DC Braking Inverse

• Set-up Select LSB

• Set-up Select MSB

• Thermistor

• Precise Stop Inverse

• Precise Stop/Start

•Jog

• Stop Command Via Serial Comm.

Switching between Auto Mode and Hand mode:

By activating the [Change Data] key in [Display Mode], the display will indicate the mode of the adjustable frequency drive.

Installation

Scroll up/down in order to switch to hand mode:

When the adjustable frequency drive is in hand mode, the readout will appear as follows:

and the reference can be changed by using the following keys:

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NOTE

Please note that parameter 020 may block the choice of mode.

VLT® 2800 Series

Warnings/alarms

Warnings or alarms appear in the LED display as a numerical code [Err. xx]. A warning is displayed until the fault has been corrected, while an alarm will flash until the [STOP/RESET] key is pressed. The table in Warnings/alarms messages in this manual explains the various warnings and alarms, and whether a fault locks the adjustable frequency drive. After a Trip locked fault, cut off the AC line supply and correct the fault. Then reconnect the AC line supply and press the [STOP/RESET] key. The adjustable frequency drive is now reset and ready. See Warnings/alarms messages in this manual for more detail.

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VLT® 2800 Series

Special conditions

Derating for ambient temperature

The ambient temperature (T

AMB,MAX

temperature allowed. The average (T

) is the maximum

AMB,AVG

) measured over 24 hours, must be at least 5 °C lower. If the frequency converter operates at temperatures above 45 °C, a derating of the rated output current is necessary.

Derating for long motor cables

The adjustable frequency drive has been designed for a 240 ft (75 m) unscreened/unarmored cable or a 80 ft (25 m) screened/armored cable and a motor cable with a rated cross-section. If a cable with a larger cross-section is required, it is recommended to reduce the output current by 5% for each step that the cable cross-section is increased. (Increased cable crosssection leads to increased capacitance to ground, and thus to an increased ground leakage current.)

VLT 2800 start-up

Pre-installation checks

1. Compare drive model number to what was ordered.

2. Ensure each of following are rated for same voltage:

• Drive

• Power line

• Motor

Installation

Temperature-related switching frequency

This function ensures the highest possible switching frequency without the adjustable frequency drive becoming thermally overloaded. The internal temperature determines the switching frequency based on the load, the ambient temperature, the supply voltage and the cable length. The function ensures that the drive automatically adjusts the switching frequency between the minimum and maximum switching frequency (parameter 411), see drawing below.

When using the LC filter the minimum switch frequency is 4.5 kHz.

3. Record following motor data:

• Voltage

• Frequency

• Full load current

• Full load speed

• Power - convert HP to kW (See conversion table in parameter 102, Mo- tor Power, in this manual.)

4. Ensure that rated drive current is equal to or greater than total full load current.

•

Drive can be at most one size smaller than motor.

• For multiple motor operations, add full load current ratings of all motors.

• If drive rating is less than motor(s), full motor output cannot be achieved.

5. Check motor wiring:

• Any disconnect between drive and motor should be interlocked to drive

MG.27.A2.22 - VLT® is a registered Danfoss trademark 31

VLT® 2800 Series

safety interlock circuit to avoid unwanted drive trips.

• No power factor correction capacitors can be connected between drive and motor.

• Two speed motors must be wired permanently for full speed.

• Y-start, -run motors must be wired permanently for run.

Installation checks

1. Input fusing in power supply for all drives must be provided.

2. Environmental concerns - for standard NEMA 1 drive:

• Clean air supply

• Dry air (5% to 85% relative humidity, non-condensing)

• 32°F (0°C) to 104°F (40°C) ambient temperature operating range, or as rated

• 1000m (3,300 ft) maximum elevation with no derating

• Keep any construction dirt out of drive.

3. Wiring

1. Parameter 102, MOTOR POWER (in kW) (See conversion table in parameter 102, Mo- tor Power, in this manual.)

2. Parameter 103, MOTOR VOLTAGE

3. Parameter 104, MOTOR FREQUENCY

4. Parameter 105, MOTOR CURRENT

5. Parameter 106, MOTOR SPEED

6. Parameter 107, select AUTOMATIC MOTOR TUNING

Operational tests - HAND

1. Check motor rotation from drive. If incorrect, disconnect input power from drive and reverse two leads between drive and motor.

2. Accelerate motor quickly to full speed and verify operation.

3. Decelerate motor quickly to stop and verify operation.

4. Operate motor over entire speed range while closely checking for resonance.

Operational tests - AUTO

1. Ensure that drive follows run/stop and safety interlock commands from system.

2. Ensure drive follows speed reference, or feedback, from system.

• Wire drive in accordance with instructions and diagrams received with drive.

• Separate conduits must be provided to drive for input power, output power, and control wiring.

• Protect signal wires from noise.

• Ground each drive individually.

• Double check input and output power wiring for correct location.

Setting up drive for motor start

Ensure that all warnings provided in this manual have been adhered to. Apply power to the unit. Enter motor nameplate data into drive through Quick Menu.

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VLT® 2800 Series

Operation & Display

001 Language

(language)

Value:

English (english) [0]

German (deutsch) [1]

French (francais) [2]

Danish (dansk) [3]

Spanish (espanol) [4]

Italian (italiano) [5]

Function:

This parameter is used to choose the language to be shown in the display whenever the LCP control unit is connected.

Description of choice:

There is a choice of the languages shown. The factory setting may vary.

002 Local/remote operation

(OPERATION SITE)

Value:

Remote operation (REMOTE) [0]

Local operation (LOCAL) [1]

Function:

There is a choice of two different modes of operation of the adjustable frequency drive; Remote operation [0] or Local operation [1]. See also parameter 013 Local control if Local operation [1] is selected.

Description of choice:

If Remote operation [0] is selected, the adjustable frequency drive is controlled via:

1. the control terminals or via serial communication.

2. the [START] key. This cannot, however, override stop commands transmitted via the digital inputs or via serial communication.

3. the [STOP/RESET] and [JOG] keys, on the condition that these are active.

If Local operation [1], is selected, the adjustable fre- quency drive is controlled via:

1. the [START] key. This cannot, however, override stop commands via the digital inputs (see parameter 013 Local control).

2. the [STOP/RESET] and [JOG] keys, on the condition that these are active.

3. the [FWD/REV] key, on the condition that is has been selected as active in parameter 016

Local reversing, and that parameter 013 Local control is set at Local control and open loop

[1] or Local control as parameter 100 [3]. Parameter 200 Output frequency range is set at Both directions.

parameter 003 Local reference where the reference can be set using the [+] and [-] keys.

5. an external control command that can be connected to the digital inputs (see parameter 013 Local control).

NOTE

The [JOG] and [FWD/REV] keys are located on the LCP control unit.

003 Local reference

(LOCAL REFERENCE)

Value:

Par. 013 Local control must be set to [1] or [2]: 0 - f

(par. 205)

MAX

50 Hz

Par. 013 Local control must be set to [3] or [4]. Ref

MIN

- Ref

(par. 204-205)

MAX

0,0

Function:

In this parameter, the local reference can be set manually. The unit of the local reference depends on the configuration selected in parameter 100 Configura- tion.

Description of choice:

In order to protect the local reference, parameter 002

Local/remote operation must be set to Local operation [1]. Local reference cannot be set via serial com-

munication.

Programming

= factory setting, () = display text, [] = value for use in communication via serial communication port

MG.27.A2.22 - VLT® is a registered Danfoss trademark 33

004 Active Setup

(active Setup)

Value:

Factory Setup (FACTORY SETUP) [0]

setup 1 (setup 1) [1]

setup 2 (setup 2) [2]

Setup 3 (setup 3) [3]

setup 4 (setup 4) [4]

Multi Setup (MULTI SETUP) [5]

Function:

The active parameter Setup is selected here. All parameters can be programmed in four individual parameter Setups. Shifts between Setups can be made in this parameter via a digital input or via serial communication.

Description of choice:

Factory Setup [0] contains the factory-set parameter values. Setup 1-4 [1]-[4] are four individual Setups which can be selected as required. Multi Setup [5] is used where remote-controlled shifts between the four Setups via a digital input or via serial communication is required.

005 Programming Set-up

(EDIT SET-UP)

Value:

Factory Set-up (FACTORY SET-UP) [0]

Set-up 1 (set-up 1) [1]

Set-up 2 (set-up 2) [2]

Set-up 3 (set-up 3) [3]

Set-up 4 (set-up 4) [4]

Active Set-up (ACTIVE SET-UP) [5]

VLT® 2800 Series

Description of choice:

Factory Set-up [0] contains the factory-set data and can be used as a source of data if the other set-ups are to be reset to a known status. Set-up 1-4 [1]-[4] consists of individual set-ups that can be programmed freely during operation. If Active Set-up [5] is selected, the programming set-up will be equal to parameter 004 Active Set-up.

NOTE

If data is modified or copied to the active set-up, the modifications have an immediate effect on the unit's operation.

006 Setup copying

(SETUP COPY)

Value:

No copying (NO COPY) [0]

Copy to Setup 1 from # (COPY TO SETUP 1) [1]

Copy to Setup 2 from # (COPY TO SETUP 2) [2]

Copy to Setup 3 from # (COPY TO SETUP 3) [3]

Copy to Setup 4 from # (COPY TO SETUP 4) [4]

Copy to all Setups from # (copy to all) [5]

Function:

You can copy from the selected active Setup in parameter 005 Programming setup to the selected Setup or Setups in this parameter.

NOTE

Copying is only possible in Stop (motor stopped in connection with a stop command).

Function:

You can select the desired set-up to program during operation (this applies both via the control panel and the serial communication port). For example, it is possible to program Set-up 2 [2] while the active set-up is set to Set-up 1 [1] in parameter 004 Active Set-up.

= factory setting, () = display text, [] = value for use in communication via serial communication port

34 MG.27.A2.22 - VLT® is a registered Danfoss trademark

Description of choice:

Copying begins when the required copying function has been selected and the [OK]/[CHANGE DATA] key has been pushed. The display indicates when copying is in progress.

VLT® 2800 Series

007 LCP copy

(LCP COPY)

Value:

No copying (NO COPY) [0]

Upload all parameters (UPL. ALL PAR.) [1]

Download all parameters (DWNL. ALL PAR.) [2]

Download size-independent parameters (DWNL.OUTPIND.PAR.) [3]

Function:

Parameter 007 LCP copy is used if you want to use the LCP 2 control panel's integral copy function. The function is used if you want to copy all parameter setups from one adjustable frequency drive to another by moving the LCP 2 control panel.

Description of choice:

Select Upload all parameters [1] if you want all parameter values to be transferred to the control panel. Select Download all parameters [2] if all parameter values transferred are to be copied to the adjustable frequency drive to which the control panel is attached. Select Download size-independent par. [3] if you only want to downloade the size-independent parameters. This is used when downloading to a adjustable frequency drive with a different rated power size than that from which the parameter setup originates.

NOTE

Upload/download can only be performed in stop mode. Download can formed to a adjustable frequency drive with the same software version number, see parameter 626 Database identification

no.

008 Display scaling of output frequency

(FREQUENCY SCALE)

Value:

0.01 - 100.00

Function:

In this parameter, the factor is selected by which the output frequency is to be multiplied. The value is shown in the display, provided parameters 009-012

only be per-

1.00

Display readout have been set to Output frequency x scaling [5].

Description of choice:

Set the required scaling factor.

009 Large display readout

(DISPLAY LINE 2)

Value:

No readout (none) [0]

Resulting reference [%] (reference [%]) [1]

Resulting reference [unit] (reference [unit]) [2]

Feedback [unit] (feedback [unit]) [3]

Frequency [Hz] (Frequency [Hz]) [4]

Output frequency x scaling (frequency x scale) [5]

Motor current [A] (Motor current [A]) [6]

Torque [%] (Torque [%]) [7]

Power [kW] (Power [kW]) [8]

Power [HP] (Power [HP][US]) [9]

Motor voltage [V] (Motor voltage [V]) [11]

DC link voltage [V] (DC link voltage [V]) [12]

Thermal load motor [%] (Motor thermal [%]) [13]

Thermal load [%] (FC. thermal[%]) [14]

Running hours [Hours] (RUNNING HOURS]) [15]

Digital input [Bin] (Digital input[bin]) [16]

Analog input 53 [V] (analog input 53 [V]) [17]

Analog input 60 [mA] (analog input 60 [mA]) [19]

Pulse reference [Hz] (Pulse ref. [Hz]) [20]

External reference [%] (external ref. [%]) [21]

Status word [Hex] (Status word [hex]) [22]

Programming

= factory setting, () = display text, [] = value for use in communication via serial communication port

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VLT® 2800 Series

Heatsink temperature [°C] (Heatsink temp [°C]) [25]

Alarm word [Hex] (Alarm word [hex]) [26]

Control word [Hex] (Control word [Hex]) [27]

Warning word [Hex] (warning word [Hex]) [28]

Extended status word [Hex] (Ext. status [hex]) [29]

Communication option card warning (COMM OPT WARN [HEX]) [30]

Pulse count (PULSE COUNTER) [31]

Function:

In this parameter you can select the data value that you wish to display in the LCP 2 control unit display line 2 when the adjustable frequency drive is switched on. The display will also be included in the scrollbar in display mode. In parameters 010-012 Display readout you can select a further three data values, which are displayed in display line 1.

Power [kW] gives the present power that the motor is absorbing in kW.

Power [HP] gives the present power that the motor is absorbing in HP.

Motor voltage[V] gives the voltage supplied to the motor.

DC link voltage [V] gives the intermediate circuit voltage of the adjustable frequency drive.

Thermal load motor [%] gives the calculated/estimated load on the motor. 100 % is the cut-out limit.

Thermal load [%] gives the calculated/estimated thermal load on the adjustable frequency drive. 100 % is the cut-out limit.

Running hours [Hours] gives the number of hours that the motor has tun since the last reset in parameter 619

Reset of running hours counter.

Digital input [Binary code] gives the signal status from

the 5 digital inputs (18, 19, 27, 29 and 33). Terminal 18 corresponds to the bit on the extreme left. `0' = no signal, `1' = signal connected.

Description of choice:

No readout can only be selected in parameters 010-012 Small display readout.

Resulting reference [%] gives, as a percentage, the resulting reference in the range from Minimum reference, Ref

to Maximum reference, Ref

MIN

MAX

Reference [unit] gives the resulting reference with unit Hz in Open loop. In Closed loop the reference unit is selected in parameter 416 Process units.

Feedback [unit] gives the resulting signal value using the unit/scaling selected in parameter 414 Minimum

feedback, FB

, 415 Maximum feedback, FB

LOW

HIGH

and

416 Process units.

Frequency [Hz] gives the output frequency of the ad-

justable frequency drive.

Output frequency x scaling [-] equals the present output frequency f

multiplied by the factor set in parameter

008 Display scaling of output frequency .

Motor current [A] gives the phase current of the motor measured as an effective value.

Torque [%] denotes the motor's present load in relation to the motor's rated torque.

Analog input 53 [V] gives the voltage value of terminal

53.

Analog input 60 [mA] gives the present value of terminal 60.

Pulse reference [Hz] gives the reference in Hz connected to terminal 33.

External reference [%] gives the sum of external references as a percentage (sum of analogue/pulse/serial communication) in the range from Minimum reference, Ref

to Maximum reference, Ref

MIN

MAX

Status word [Hex] gives one or several status conditions in a Hex code. See Serial communication in the

VLT 2800 Design Guide for further information.

Heatsink temp.[°C] gives the present heatsink temper-

ature of the adjustable frequency drive. The cut-out limit is 90-100°C, while cutting back in occurs at 70 ± 5°C.

Alarm word [Hex] gives one or several alarms in hex code. See Serial communication in the VLT 2800 De-

sign Guide for further information.

Control word [Hex] gives the control word for the ad-

justable frequency drive. See Serial communication in the VLT 2800 Design Guide for further information.

= factory setting, () = display text, [] = value for use in communication via serial communication port

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VLT® 2800 Series

Warning word [Hex] gives one or several warnings in hex code. See Serial communication in the VLT 2800

Design Guide for further information.

Extended status word [Hex] gives one or several status modes in Hex code. See Serial communication in the VLT 2800 Design Guide for further information.

Communication option card warning [Hex] gives a

warning word if there is a fault in the communication bus. Only active if communication options are installed. If there are no communication options 0 Hex is displayed.

Pulse count gives the number of pulses that the unit has registered.

010 Small display line 1.1

(DISPLAY LINE 1.1)

Value:

See par. 009 Large display readout

Function:

In this parameter, the first of three data values can be selected that is to be displayed in the LCP control unit display, line 1, position 1. This is a useful function, e.g. when setting the PID regulator, as it gives a view of process reactions to reference changes. The display readout is activated by pushing the [DISPLAY STATUS] key.

Description of choice:

See parameter 009 Large display readout.

Analog input 53

[V] [17]

012 Small display readout 1.3

(DISPLAY LINE 1.3)

Value:

See parameter 009 Large display readout

Function:

See the functional description given under parameter 010 Small display readout.

Description of choice:

See parameter 009 Large display readout.

013 Local control

(LOC CTRL/CONFIG.)

Value:

Local not active (DISABLE) [0]

Local control and open loop without slip compensation (LOC CTRL/OPEN LOOP) [1]

Remote-operated control and open loop without slip compensation (LOC+DIG CTRL) [2]

Local control as parameter 100 (LOC CTRL/AS P100) [3]

Remote-operated control as parameter 100 (LOC+DIG CTRL/AS P100) [4]

Function:

This is where the required function is selected if, in parameter 002 Local/remote operation, Local opera- tion [1] has been chosen.

Feedback

[unit] [3]

Programming

Description of choice:

011 Small display readout 1.2

(DISPLAY LINE 1.2)

Value:

See parameter 009 Large display readout

Function:

See the functional description given under parameter 010 Small display readout.

Description of choice:

See parameter 009 Large display readout.

= factory setting, () = display text, [] = value for use in communication via serial communication port

MG.27.A2.22 - VLT® is a registered Danfoss trademark 37

Motor cur-

rent [A][6]

If Local not active [0] is selected, it is not possible to set a reference via parameter 003 Local reference. In order to enable a shift to Local not active [0], parameter 002 Local/remote operation must be set to Remote

operation [0].

Local control and open loop [1] is used if the motor

speed is to be set via parameter 003 Local reference. When this choice is made, parameter 100 Configura-

tion automatically shifts to Speed regulation, open loop [0].

Remote-operated control and open loop [2] functions in the same way as Local control and open loop [1];

VLT® 2800 Series

however, the adjustable frequency drive can also be controlled via the digital inputs.

For selections [1-2] control is shifted to open loop, no slip compensation.

Local control as parameter 100 [3] is used when the motor speed is to be set via parameter 003 Local ref- erence, but matically shifting to Speed regulation, open loop [0].

Remote-operated control as parameter 100 [4] works the same way as Local control as parameter 100 [3]; however, the adjustable frequency drive can also be controlled via the digital inputs.

Shifting from Remote operation to Local operation in parameter 002 Local/remote operation, while this parameter has been set to Remote-operated control and open loop [1]: The present motor frequency and direction of rotation will be maintained. If the present direction of rotation does not respond to the reversing signal (negative reference), the reference will be set to 0.

Shifting from Local operation to Remote operation in parameter 002 Local/remote control, while this parameter has been set to Remote-operated control and open

loop [1]: The configuration selected in parameter 100 Configuration will be active. The shift will be smooth.

without parameter 100 Configuration auto-

Function:

In this parameter, the local [STOP]-key can be engaged or disengaged on the control panel and on the LCP control panel.

Description of choice:

If Not active [0] is selected in this parameter, the [STOP]-key will be inactive.

NOTE

If Not active [0] is selected, the motor cannot be stopped by means of the [STOP]key.

015 Local jog

(LOCAL JOGGING)

Value:

Not active (DISABLE) [0]

Active (ENABLE) [1]

Function:

In this parameter, the jog function on the LCP control panel can be engaged/disengaged.

Shifting from Remote control to Local control in parameter 002 Local/remote operation, while this parameter has been set to Remote-operated control as parameter 100 [4]: the present reference will be maintained. If the reference signal is negative, the local reference will be set to 0.

Shifting from Local operation to Remote operation in parameter 002 Local/remote operation, while this parameter has been set to Remote operation: The local reference will be replaced by the remote-operated reference signal.

014 Local stop

(LOCAL STOP)

Value:

Not active (DISABLE) [0]

Active (ENABLE) [1]

Description of choice:

If Not active [0] is selected in this parameter, the [JOG]- key will be inactive.

016 Local reverse

(LOCAL REVERSE)

Value:

Not active (DISABLE) [0]

Active (ENABLE) [1]

Function:

In this parameter you can select/deselect the reverse function on the LCP control panel. The key can only be used if parameter 002 Local/remote operation is set to Local operation [1] and parameter 013 Localcon-

trol to Local control, open loop [1] or Local control as parameter 100 [3].

= factory setting, () = display text, [] = value for use in communication via serial communication port

38 MG.27.A2.22 - VLT® is a registered Danfoss trademark

VLT® 2800 Series

Description of choice:

If Disable [0] is selected in this parameter, the [FWD/ REV] key will be disabled. See also parameter 200 Output frequency range.

017 Local reset of trip

(LOCAL RESET)

Value:

Not active (DISABLE) [0]

Active (ENABLE) [1]

Function:

In this parameter, the reset function on the control panel can be engaged/disengaged.

Description of choice:

If Not active [0] is selected in this parameter, the reset function will be inactive.

NOTE

Select Not active [0], only if an external reset signal has been connected via the digital inputs.

018 Lock for data changes

(DATA CHANGE LOCK)

Value:

Not locked (NOT LOCKED) [0]

Locked (LOCKED) [1]

Function:

In this parameter, it is possible to 'lock' the controls to disable data changes via the control keys.

Description of choice:

If Locked [1] is selected, data changes in the parameters cannot be made; however, it will still be possible to make data changes via serial communication. Parameter 009-012 Display readout can be changed via the control panel.

019

Value:

Auto restart, use saved reference (AUTO RESTART) [0]

Forced stop, use saved reference (LOCAL=STOP) [1]

Forced stop, set ref. to 0 (LOCAL=STOP, REF=0) [2]

Function:

Setting of the required operating mode when the mains voltage is engaged. This function can only be active if Local operation [1] has been selected in parameter 002 Local/remote operation.

Description of choice:

Auto restart, use saved ref. [0] is selected if the adjustable frequency drive is to start using the local reference (set in parameter 003 Local reference) and the start/stop state given via the control keys immediately prior to the mains voltage being cut out. Forced stop, use saved ref. [1] is selected if the adjustable frequency drive is to remain stopped when the mains voltage is engaged, until the [START]-key is activated. After a start command the motor speed is ramped up to the saved reference in parameter 003

Local reference. Forced stop, set ref. to 0 [2] is selected if the adjustable

frequency drive is to remain stopped when the mains voltage is cut back in. Parameter 003 Local reference is to be zeroed.

Operating mode at power-up, local operation

(POWER UP ACTION)

NOTE

In remote operation (parameter 002 Local/remote operation) the start/stop state

at the time of mains connection will depend on the external control signals. If

Pulse start [8] is selected in parameter 302 Digital input, the motor will remain stopped

after mains connection.

Programming

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MG.27.A2.22 - VLT® is a registered Danfoss trademark 39

020 Hand operation

(HAND OPERATION)

Value:

Not active (DISABLE) [0]

Active (ENABLE) [1]

Function:

In this parameter you can select whether it should be possible or not to switch between Auto- and Hand mode. In Auto mode the adjustable frequency drive is controlled by external signals whereas the adjustable frequency drive in Hand mode is controlled via a local reference directly from the control unit.

Description of choice:

If Not active [0] is selected in this parameter, the Hand mode function will be inactive. If Active [1] is selected you can switch between Auto- and Hand mode. For further information, see the Control Unit section.

VLT® 2800 Series

025 Quick Menu setup

(Quick Menu setup)

Value:

[Index 1 - 20] Value: 0 - 999

Function:

In this parameter you define which parameters are required in the Quick Menu when parameter 024 User- defined Quick Menu is set to Active [1].´ Up to 20 parameters can be selected for the user-defined Quick Menu.

NOTE

Please note that this parameter can only be set using an LCP 2 control panel. See Order form.

Description of choice:

The Quick Menu is set up as follows:

Select parameter 025 Quick Menu setup and press [CHANGE DATA].

000

024 Userdefined Quick Menu

(user quickmenu)

Value:

Not active (Disable) [0]

Active (Enable) [1]

Function:

In this parameter you can select the standard setup of the Quick menu key on the control panel and the LCP 2 control panel. Using this function, in parameter 025 Quick Menu set- up the user can select up to 20 parameters for the Quick Menu key.

Description of choice:

If not active [0] is selected, the standard setup of the Quick Menu key is active. If Active [1] is selected, the user-defined Quick Menu is active.

2. Index 1 indicates the first parameter in Quick Menu. You can scroll between the index numbers using the [+ / -] keys. Select Index

3. Using [< >] you can scroll between the three figures. Press the [<] key once ad the last number in the parameter number can be selected using the [+ / -] keys. Set Index 1 to 100 for parameter 100 Configuration.

4. Press [OK] when Index 1 has been set to 100.

5. Repeat steps 2 - 4 until all parameters required have been set to the Quick Menu key.

6. Press [OK] to complete the Quick Menu setup.

If parameter 100 Configuration is selected at Index 1, Quick Menu will start with this parameter every time Quick Menu is activated.

Please note that parameter 024 User-defined Quick Menu and parameter 025 Quick Menu setup are reset to the factory setting during initialisation.

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40 MG.27.A2.22 - VLT® is a registered Danfoss trademark

VLT® 2800 Series

Load and Motor

100 Configuration

(Configuration)

Value:

Speed control, open-loop (SPEED OPEN-LOOP) [0]

Speed control, closed-loop (SPEED CLOSED-LOOP) [1]

Process control, closed-loop (PROCESS CLOSED-LOOP) [3]

Function:

This parameter is used to select the configuration to which the adjustable frequency drive is to be adapted. This makes adaptation to a given application simple, since the parameters not used in a given configuration are hidden (not active).

Description of choice:

If Speed control, open-loop [0] is selected, normal speed control is obtained (without feedback signal) with automatic load and slip compensation to ensure a constant speed at varying loads. Compensations are active, but may be disabled in parameter 134 Load compensation and parameter 136 Slip compensation as required.

If Speed control, closed-loop [1] is selected, better speed accuracy is obtained. A feedback signal must be added, and the PID regulator must be set in parameter group 400 Special functions.

If Process control, closed-loop [3] is selected, the in- ternal process regulator is activated to enable precise control of a process in relation to a given process signal. The process signal can be set to the relevant process unit or as a percentage. A feedback signal must be added from the process, and the process regulator must be set in parameter group 400 Special functions. Process closed-loop is not active if a DeviceNet card is mounted and Instance 20/70 or 21/71 is chosen in parameter 904 Instance types.

101 Torque characteristic

(TORQUE CHARACT)

Value:

Constant torque (Constant torque) [1]

Variable torque low (torque: low) [2]

Variable torque medium (torque: med) [3]

Variable torque high (torque: high) [4]

Variable torque low with CT start (VT LOW CT START) [5]

Variable torque medium with CT start (VT MED CT START) [6]

Variable torque high with CT start (VT HIGH CT START) [7]

Special motor mode (Special motor mode) [8]

CT = Constant torque

Function:

This parameter enables a choice of principle for adaptation of the U/f ratio of the variable frequency drive to the torque characteristic of the load. See par. 135 U/f

ratio.

Description of choice:

If Constant torque [1] is selected, a load-dependent U/ f characteristic is obtained, in which output voltage and output frequency are increased at increasing loads in order to maintain constant magnetization of the motor.

Select Variable torque low [2], Variable torque medium [3] or Variable torque high [4], if the load is square (centrifugal pumps, fans).

Variable torque - low with CT start [5], - medium with CT start [6] or high with CT start [7], are selected if you

need a greater breakaway torque than can be achieved with the three first characteristics.

NOTE

Load and slip compensation are not active if variable torque or special motor mode have been selected.

Programming

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MG.27.A2.22 - VLT® is a registered Danfoss trademark 41

Select Special motor mode [8], if a special U/f setting is needed that is to be adapted to the present motor. The break points are set in parameters 423-428 Volt- age/frequency .

VLT® 2800 Series

North American HP to kW

Conversion Chart HP 1/2 0.37 3/4 0.55

1 0.75

1 1/2 1.1

2 1.5 3 2.2 4 3.0 5 4

7 1/2 5.5

10 7.5

NOTE

If a value set in the name-plate parameters 102-106 is changed, parameters 108

Stator resistance and 109 Stator reactance change automatically. Enter motor

name plate data in sequence from parameter 102 to 106. The relationship between values are interdependent.

102

Motor power P

M,N

(motor power)

Value:

0.25 - 22 kW

Depends on unit

Function:

Here you must set a power value [kW] P

M,N

, corre-

sponding to the motor's rated power.

Description of choice:

Set a value that matches the nameplate data on the motor. Settings between one size below and one size over the factory setting are possible.

103

Motor voltage U

M,N

(MOTOR VOLTAGE)

Value:

For 200 V units: 50 - 999 V

For 400 V units: 50 - 999 V

230 V

400 V

Function:

This is where to set the rated motor voltage.

Description of choice:

Select a value that corresponds to the nameplate data on the motor, regardless of the adjustable frequency drive's AC line voltage.

104

Motor frequency f

M,N

(MOTOR FREQUENCY)

Value:

24-1000 Hz

50 Hz

Function:

This is where to select the rated motor frequency

M,N

Description of choice:

Select a value that corresponds to the nameplate data on the motor.

105

Motor current I

M,N

(MOTOR CURRENT)

Value:

0,01 - I

MAX

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42 MG.27.A2.22 - VLT® is a registered Danfoss trademark

Depends on choice of motor

Function:

The nominal, rated current of the motor I

forms part

M,N

of the variable frequency drive calculation of features such as torque and motor thermal protection.

Description of choice:

Set a value that corresponds to the nameplate data on the motor. Set the motor current I

taking into ac-

M,N

count whether the motor is star-connected Y or deltaconnected .

106 Rated motor speed

(MOTOR NOM. SPEED)

Value:

M,N

x 60

Depends on parameter 104 Mo-

tor frequency, f

M,N

100 - f (max. 60000 rpm)

Function:

This is where to set the value that corresponds to the rated motor speed n

that can be seen from the

M,N

nameplate data.

VLT® 2800 Series

For AMT to define the motor parameters ac-

ccurately, the correct nameplate data for the motor connected to the adjustable frequency drive must be keyed into parameters 102 to

106.

Alarms will appear in the display if faults arise

during tuning of the motor. See Warnings/ alarms messages in this manual.

As a rule, the AMT function can measure the

values for motors that are 1-2 sizes larger

or smaller than the adjustable frequency drive’s nominal size.

If you wish to interrupt automatic motor tun-

ing, press the [STOP/RESET] key.

NOTE

AMT may not be performed on motors connected in parallel, nor may setup changes be made while AMT is running.

See Automatic motor tuning in this manual for the AMT procedure.

Description of choice:

Select a value that corresponds to the nameplate data on the motor.

NOTE

The max. value equals f

M,N

x 60. f

M,N

to be

set in parameter 104 Motor frequency,

M,N

107 Automatic motor tuning, AMT

(auto motor tun.)

Value:

Optimisation off (AMT off) [0]

Optimisation on (AMT start) [2]

Function:

NOTE

AMT is not possible on VLT 2880-82.

Description of choice:

Select Optimization on [2] as part of the AMT procedure if you want the adjustable frequency drive to perform automatic motor tuning.

108

Stator resistance R

(STATOR RESISTAN)

Value:

0.000 - X.XXX 

Depends on choice of motor

Function:

After setting of parameters 102-106 Nameplate data, a number of adjustments of various parameters is carried out automatically, including stator resistance R A manually entered R

must apply to a cold motor. The

shaft performance can be improved by fine-tuning R and XS, see procedure below.

NOTE

Parameters 108 Stator resistance R 109 Stator reactance X

are normally not

and

to be changed if nameplate data has been set.

Programming

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MG.27.A2.22 - VLT® is a registered Danfoss trademark 43

Description of choice:

can be set as follows:

1. Use the factory settings of R

which the ad-

justable frequency drive itself chooses on the basis of the motor nameplate data.

2. The value is stated by the motor supplier.

3. The value is obtained through manual measurements: R ing the resistance R phase terminals. Where R

can be calculated by measur-

PHASE-PHASE

between two

PHASE-PHASE

is lower than 1-2 Ohms (typical for motors > 7.5 HP, 400 V), a special Ohm-meter should be used (Thomson-bridge or similar). R

4. R

PHASE-PHASE

is set automatically when AMT has been

= 0.5 x

completed. See parameter 107 Auto motor tuning.

109

Stator reactance X

(STATOR REACTANCE)

Value:

0.00 - X,XX 

Depends on choice of motor

Function:

After parameters 102-106 Nameplate data are set, a number of parameters are adjusted automatically, including stator reactance X can be improved by fine-tuning R

. The shaft performance

and XS; see proce-

dure below.

VLT® 2800 Series

117 Resonance damping

(resonance damping)

Value:

OFF 100 [OFF 100]

Off [OFF]

Function:

It is possible to optimize the resonance damping in CT mode. The grade of the influence is adjusted in this parameter. The value may be set between 0% (OFF) and 100%. 100% corresponds to 50% reduction of U/F ratio. Default value is OFF.

Internal settings (fixed): The resonance filter is active from 10% of nominal speed and above. In this case 5Hz and above. Speed to go from 0 to nominal flux level: 500ms Speed to go from nominal to 0 flux level: 500 ms

Description of functionality: The filter monitors the active motor current and changes the motor voltage according to the figure below. The filter reacts on levels referring to the nominal motor current.

Description of choice:

can be set as follows:

1. The value is stated by the motor supplier.

2. The value is obtained through manual measurements; X

is obtained by connecting a

motor to line power and measuring the phase-phase voltage U



3×

and the idle current

−

XL: See parameter 142.

3. Use the factory settings of X

, which the ad-

justable frequency drive itself chooses on the

If the active motor current is below 10%, the motor voltage will be decreased by the speed mentioned above until the voltage reaches the setting for Par.

117. If the active motor current comes over 20% the voltage will be increased by the above-mentioned speed. If the active motor current reaches 40% the motor voltage will be increased immediately to normal motor voltage. The reduction in motor voltage depends on the parameter 117 setting.

basis of the motor nameplate data.

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44 MG.27.A2.22 - VLT® is a registered Danfoss trademark

VLT® 2800 Series

Description of choice:

Set the grade of Motor current [Imact] influence on the U/F ratio between 0% (OFF) and 100%. 100% corresponds to 50% reduction of U/F ratio. Default value is OFF.

119 High start torque

(High start torq.)

Value:

0.0 - 0.5 sec.

0.0 sec.

Function:

To ensure a high start torque approx. 1.8 x I

INV.

can be permitted for max. 0.5 sec. The current is, however, limited by the variable frequency drive's (inverter's) safety limit. 0 sec. corresponds to no high start torque.

Description of choice:

Set the necessary time for which a high start torque is required.

(COAST/DELAY TIME)

Start frequency/voltage clockwise (CLOCKWISE OPERATION) [3]

Start frequency/voltage in reference direction (VERTICAL OPERATION) [4]

Function:

This is where to choose the required mode during the start delay time (parameter 120 Start delay time).

Description of choice:

Select DC hold during start delay time [0] to energize the motor with a DC hold voltage during the start delay time. Set voltage in parameter 137 DC hold voltage.

Choose DC brake during start delay time [1] to energize the motor with a DC brake voltage during the start delay time. Set voltage in parameter 132 DC brake volt- age.

Choose Coasting during start delay time [2] and the motor will not be controlled by the adjustable frequency drive during the start delay time (inverter turned off).

120 Start delay

(START DELAY)

Value:

0.0 - 10.0 sec.

0.0 sec.

Function:

This parameter enables a delay of the start-up time after the conditions for start have been fulfilled. When the time has passed, the output frequency will start by ramping up to the reference.

Description of choice:

Set the necessary time before commencing to accelerate.

121 Start function

(START FUNCTION)

Value:

DC hold during start delay time (DC HOLD/DELAY TIME) [0]

DC brake during start delay time (DC BRAKE/DELAY TIME) [1]

Coasting during start delay time [2]

Choose Start frequency/voltage clockwise [3] to obtain the function described in parameter 130 Start frequen- cy and 131 Voltage at start during start delay time. Regardless of the value assumed by the reference signal, the output frequency equals the setting in parameter 130 Start frequency and the output voltage will correspond to the setting in parameter 131 Voltage at start . This functionality is typically used in hoist applications. It is used in particular in applications in which a cone anchor motor is applied, where the direction of rotation is to start clockwise followed by the reference direction.

Select Start frequency/voltage in reference direction [4] to obtain the function described in parameter 130 Start frequency and 131 Voltage at start during the start delay time. The direction of rotation of the motor will always follow in the reference direction. If the reference signal equals zero, the output frequency will equal 0 Hz, while the output voltage will correspond to the setting in parameter 131 Voltage at start. If the reference signal is different from zero, the output frequency will equal parameter 130 Start frequency and the output voltage will equal parameter 131 Voltage at start. This functionality is used typically for hoist applications with counter-

Programming

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MG.27.A2.22 - VLT® is a registered Danfoss trademark 45

weight. It is used in particular for applications in which a cone anchor motor is applied. The cone anchor motor can break away using parameter 130 Start frequen- cy and parameter 131 Voltage at start.

122 Function at stop

(FUNCTION AT STOP)

Value:

Coasting (COAST) [0]

DC hold (DC HOLD) [1]

Function:

This is where to choose the function of the variable frequency drive after the output frequency has become lower than the value in parameter 123 The min. fre- quency for activation of function at stop or after a stop command and when the output frequency has been ramped down to 0 Hz.

Description of choice:

Select Coasting [0] if the variable frequency drive is to 'let go' of the motor (inverter turned off).

Select DC hold [1] if parameter 137 DC hold voltage is to be activated.

123

Min. frequency for activation of function at stop

(MIN.F.FUNC.STOP)

Value:

0,1 - 10 Hz

0,1 Hz

Function:

In this parameter, the output frequency is set at which the function selected in parameter 122 Function at stop is to be activated.

Description of choice:

Set the required output frequency.

NOTE

If parameter 123 is set higher than parameter 130, then the start delay function (parameter 120 and 121) will be skipped.

VLT® 2800 Series

NOTE

If parameter 123 is set too high, and DC hold has been chosen in parameter 122, the output frequency will jump to the value in parameter 123 without ramping up. This may cause an overcurrent warning / alarm.

126 DC brake time

(DC BRAKING TIME)

Value:

0 - 60 sec.

Function:

In this parameter, the DC brake time is set at which parameter 132 DC brake voltage is to be active.

Description of choice:

Set the required time.

127 DC brake cut-in frequency

(DC BRAKE CUT-IN)

Value:

0.0 (OFF) - par. 202

Output frequency high limit, f

MAX

Function:

In this parameter, the DC brake cut-in frequency is set at which the DC brake is to be activated in connection with a stop command.

Description of choice:

Set the required frequency.

128 Thermal motor protection

(MOT.THERM PROTEC)

Value:

No protection (NO PROTECTION) [0]

Thermistor warning (THERMISTOR WARN) [1]

Thermistor trip (THERMISTOR TRIP) [2]

ETR warning 1 (ETR WARNING 1) [3]

ETR trip 1 (ETR TRIP 1) [4]

10 sec

OFF

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46 MG.27.A2.22 - VLT® is a registered Danfoss trademark

VLT® 2800 Series

ETR warning 2 (ETR WARNING 2) [5]

ETR trip 2 (ETR TRIP 2) [6]

ETR warning 3 (ETR WARNING 3) [7]

ETR trip 3 (ETR TRIP 3) [8]

ETR warning 4 (ETR WARNING 4) [9]

ETR trip 4 (ETR TRIP 4) [10]

Function:

The adjustable frequency drive can monitor the motor temperature in two different ways:

Via a PTC thermistor that is mounted on the

motor. The thermistor is connected between terminal 50 (+10V) and one of the digital input terminals 18, 19, 27 or 29. See parameter 300 Digital inputs.

Thermal load calculation (ETR - Electronic

Thermal Relay), based on present load and time. This is compared with the rated motor current I

and rated motor frequency f

M,N

The calculations take into account the need for lower loading at low speeds due to the motor's internal ventilation being reduced.

Select ETR warning 1-4 if you want a warning when the motor is overloaded according to the calculations. You can also program the adjustable frequency drive to give a warning signal via one of the digital outputs. Select ETR Trip 1-4 if you want a trip when the motor is overloaded according to the calculations.

NOTE

This function cannot protect the individual motors in the case of motors linked in parallel.

130 Start frequency

(Start frequency)

Value:

0.0 - 10.0 Hz

Function:

The start frequency is active for the time set in param-

eter 120 Start delay, after a start command. The output frequency will 'jump' to the next preset frequency. Certain motors, such as conical anchor motors, need an extra voltage/start frequency (boost) at start to disengage the mechanical brake. To achieve this parameters 130 Start frequency and 131 Initial voltage are used.

0.0 Hz

Programming

ETR functions 1-4 do not begin to calculate the load until you switch to the Setup in which they have been selected. This means that you can use the ETR function even when changing between two or more motors.

Description of choice:

Select No protection [0] if you do not want a warning or trip when a motor is overloaded. Select Thermistor warning [1] if you want a warning when the connected thermistor becomes too hot. Select Thermistor trip [2] if you want a trip when the connected thermistor becomes too hot.

Description of choice:

Set the required start frequency. It is a precondition that parameter 121 Start function, is set to Start fre-

quency/voltage clockwise [3] or Start frequency voltage in reference direction [4] and that in parameter 120 Start delay a time is set and a reference signal is present.

NOTE

If parameter 123 is set higher than parameter 130, the start delay function (parameter 120 and 121) will be skipped.

131 Initial voltage

(INITIAL VOLTAGE)

Value:

0.0 - 200.0 V

0.0 V

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MG.27.A2.22 - VLT® is a registered Danfoss trademark 47

Function:

Initial voltage is active for the time set in parameter 120 Start delay , after a start command. This parameter can

be used for example for lifting/dropping applications (conical anchor motors).

Description of choice:

Set the required voltage necessary to cut out the mechanical brake. It is assumed that parameter 121 Start function, is set to Start frequency/voltage clockwise [3] or Start frequency/voltage in reference direction [4] and that in parameter 120 Start delay a time is set, and that a reference signal is present.

132 DC brake voltage

(DC BRAKE VOLTAGE)

Value:

0 - 100% of max. DC brake voltage

Function:

In this parameter, the DC brake voltage is set which is to be activated at stop when the DC brake frequency set in parameter 127 DC brake cut-in frequency is reached, or if DC braking inverse is active via a digital input or via serial communication. Subsequently, the DC brake voltage will be active for the time set in parameter 126 DC brake time.

Description of choice:

To be set as a percentage value of the max. DC brake voltage, which depends on the motor.

VLT® 2800 Series

Description of choice:

The factory setting will be suitable for must applications, the value may need to be increase gradually for high torque application.

Warning: If the use of start voltage is exaggerated, this may lead to over-energizing and overheating of the motor and the variable frequency drive may cut out.

134 Load compensation

(LOAD COMPENSATIO)

Value:

0.0 - 300.0%

Function:

In this parameter, the load characteristic is set. By increasing the load compensation, the motor is given an extra voltage and frequency supplement at increasing loads. This is used e.g. in motors/applications in which there is a big difference between the full-load current and idle-load current of the motor.

100.0%

NOTE

133 Start voltage

(START VOLTAGE)

Value:

0.00 - 100.00 V

Function:

A higher start torque can be obtained by increasing the start voltage. Small motors (< 1.0 HP) normally require a high start voltage.

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48 MG.27.A2.22 - VLT® is a registered Danfoss trademark

Depends on unit

Description of choice:

If the factory setting is not adequate, load compensation must be set to enable the motor to start at the given load.

If this value is set too high, the variable frequency drive may cut out because of overcurrent.

Warning: Should be set to 0% in connection with synchronous and parallel-coupled motors and in the case of quick load changes. Too high load compensation may lead to instability.

135 U/f-ratio

(U/f RATIO)

Value:

0.00 - 20.00 at Hz

Depends on unit

Function:

This parameter enables a linear shift in the ratio between output voltage (V) and output frequency (f) to ensure correct energizing of the motor and thus optimum dynamics, accuracy and efficiency. The V/f-ratio only affects the voltage characteristic if Constant tor-

que [1] has been selected in parameter 101 Torque characteristic .

Description of choice:

Change the V/f-ratio only if it is not possible to set the correct motor data in parameters 102-109. The value programmed in the factory settings is based on idle operation.

VLT® 2800 Series

Function:

This parameter is used to keep the motor (holding torque) at start/stop.

Description of choice:

This parameter can only be used if a selection has been made of DC hold in parameter 121 Start func- tion or 122 Function at stop . To be set as a percentage value of the max. DC hold voltage, which depends on the choice of motor.

138 Brake cut out value

(Brake cut out)

Value:

0.5 - 132.0/1000.0 Hz

Function:

Select the frequency at which the external brake is released, via the output defined in parameter 323 Relay output 1-3 or 341 Digital output, terminal 46.

3.0 Hz

136 Slip compensation

(SLIP COMP.)

Value:

-500 - +500% of rated slip compensation

100%

Function:

Slip compensation is calculated automatically, on the basis of such data as the rated motor speed n

M,N

. In this parameter, the slip compensation can be finetuned, thereby compensating for tolerances on the value for n

. Slip compensation is only active if a se-

M,N

lection has been made of Speedregulation, open

loop [0] in parameter 100 Configuration and Constant torque [1] in parameter 101 Torque characteristic.

Description of choice:

Key in a % value.

137 DC hold voltage

(DC HOLD VOLTAGE)

Value:

0 - 100% of max. DC hold voltage

Description of choice:

Set the required frequency.

139 Brake cut in frequency

(Brake cut in)

Value:

0.5 - 132.0/1000.0 Hz

3.0 Hz

Function:

Select the frequency at which the external brake is activated; this takes place via the output defined in parameter 323 Relay output 1-3 or 341 Digital output terminal 46.

Description of choice:

Set the required frequency.

140 Current, minimum value

(CURRENT MIN VAL)

Value:

0 % - 100 % of inverter output current

0 %

Programming

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MG.27.A2.22 - VLT® is a registered Danfoss trademark 49

VLT® 2800 Series

Function:

This is where the user selects the minimum motor current running for the mechanical brake to be released. Current monitoring is only active from stop until the point when the brake is released.

Description of choice:

This is an extra safety precaution, aimed at guaranteeing that the load is not lost during start of a lifting/ lowering operation.

142

Leakage reactance X

(LEAK. REACTANCE)

Value:

0.000 - XXX,XXX 

Depends on choice of mo-

tor

is the sum of rotor and sta-

tor leakage reactance.

Function:

After setting of parameters 102-106 Nameplate data, a number of adjustments of various parameters is made automatically, including the leakage reactance X

. The

shaft performance can be improved by fine-tuning the leakage reactance X

NOTE

Parameter 142 The leakage reactance X is normally not to be changed if the nameplate data has been set, parameters 102-106.

Description of choice:

can be set as follows:

1. The value is stated by the motor supplier.

2. Use the factory settings of X

, which the ad-

justable frequency drive itself chooses on the basis of the motor nameplate data.

143 Internal fan control

(fan control)

Value:

Automatic (automatic) [0]

Always switched on (always on) [1]

Always switched off (always off) [2]

Function:

This parameter can be set so that the internal fan is automatically switched on and off. You can also set the internal fan to be permanently switched on or off.

Description of choice:

If Automatic [0] is selected, the internal fan is switched on or off depending on the ambient temperature and the loading of the adjustable frequency drive. If Always switched on [1] or Always switched off [2] is selected, the internal fan will be permanently switched on or off, respectively.

NOTE

If Always switched off [2] is selected in combination with high switch frequency, long motor cables or high output power, the adjustable frequency drive's life span is reduced. This applies in particular to

1.5, 2, 4 and 5 HP units.

144 Gain AC brake

(Gain AC brake)

Value:

1.00 - 1.50

1.30

Function:

This parameter is used to set the AC brake. Using par. 144 it is possible to adjust the size of the generator torque that can be applied to the motor without the intermediate circuit voltage exceeding the warning level.

Description of choice:

The value is increased if a greater possible brake torque is required. If 1.0 is selected, this corresponds to the AC brake being inactive.

NOTE

If the value in par. 144 is increased, the motor current will simultaneously increase significantly when generator loads are applied. The parameter should therefore only be changed if it is guaranteed during measurement that the motor current in all

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50 MG.27.A2.22 - VLT® is a registered Danfoss trademark

operating situations will never exceed the maximum permitted current in the motor. Please note: that the current read out from the display.

146 Reset voltage vector

(RESET VECTOR)

Value:

*Off (OFF) [0]

Reset (RESET) [1]

Function:

When the voltage vector is reset it is set to the same starting point each time a new process commences.

Description of choice:

Select reset (1) when running unique processes each time they arise. This will enable repetitive precision when stopping to be improved. Select Off (0) for example for lifting/lowering operations or synchronous motors. It is an advantage that the motor and the variable frequency drive are always synchronized.

cannot be

VLT® 2800 Series

Programming

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VLT® 2800 Series

References & Limits

200 Output frequency range

(OUT FREQ. RNG/ROT)

Value:

Only clockwise, 0 - 132 Hz (132 Hz CLOCKWISE) [0]

Both directions, 0 - 132 Hz (132 Hz BOTH DIRECT) [1]

Counter-clockwise only, 0 - 132 Hz (132 Hz COUNTER CLOCK) [2]

Clockwise only, 0 - 1,000 Hz (1,000 Hz CLOCK WISE) [3]

Both directions, 0 - 1,000 Hz (1,000 Hz BOTH DIRECT) [4]

Counter-clockwise only, 0 - 1,000 Hz (1,000 Hz COUNTER CLOCK) [5]

Function:

This parameter guarantees protection against unwanted reversing. Furthermore, the maximum output frequency that is to apply regardless of the settings of other parameters can be selected. This parameter has no function if Process regulation, closed-loop has been selected in parameter 100 Configuration.

Description of choice:

Select the required direction of rotation as well as the maximum output frequency. Please note that if Clock- wise only [0]/[3] or Counter-clockwise only [2]/[5] is selected, the output frequency will be limited to the range f

MIN-f MAX

output frequency will be limited to the range ± f

. If Both directions [1]/[4] is selected, the

(the

MAX

minimum frequency is of no significance).

201

Output frequency low limit, f

MIN

(MIN OUTPUT FREQ)

Value:

0.0 - f

MAX

0.0 Hz

Function:

In this parameter, a minimum motor frequency limit can be selected that corresponds to the minimum speed at which the motor is allowed to run. If Both di-

rections has been selected in parameter 200 Output frequency range, the minimum frequency is of no sig-

nificance.

Description of choice:

The value chosen can range from 0.0 Hz to the frequency set in parameter 202 Output frequency high

limit, f

202

MAX

Output frequency high limit, f

MAX

(max. output freq)

Value:

- 132/1,000 Hz (par. 200 Output fre-

MIN

quency range)

132 Hz

Function:

In this parameter, a maximum output frequency limit can be selected that corresponds to the highest speed at which the motor is allowed to run.

NOTE

The output frequency of the adjustable frequency drive can never assume a value higher than 1/10 of the switching frequency (parameter 411Switching frequency).

Description of choice:

A value can be selected from f

to the value chosen

MIN

in parameter 200 Output frequency range.

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52 MG.27.A2.22 - VLT® is a registered Danfoss trademark

VLT® 2800 Series

203 Reference range

(REFERENCE RANGE)

Value:

Min. reference - Max reference (min - max) [0]

-Max. reference - Max. reference (-max - +max) [1]

Function:

In this parameter you select whether the reference signal must be positive or whether it can be both positive and negative. The minimum limit may be a negative value, unless in parameter 100 Configuration a selection has been made of Speed regulation, closed

loop. You should select Min ref. - Max. ref. [0], if Process regulation, closed loop [3] has been selected in parameter 100 Configuration.

Description of choice:

Select the required range.

204

Minimum reference, Ref

MIN

(Min.reference)

Value:

Par. 100 Config. = Open loop [0].-100,000.000 - par. 205 Ref

MAX

0.000 Hz

Par. 100 Config. = Closed loop [1]/[3].- Par. 414 Minimum feedback - par. 205

Ref

MAX

0.000

rpm/par 416

Function:

Minimum reference is an expression of the minimum possible value of the total of all references. If in parameter 100 Configuration, Speed regulation, closed loop [1] or Process regulation, closed loop [3] is selected, the minimum reference is limited by parameter 414 Minimum feedback. Minimum reference is ignored if the local reference is active.

The reference unit can be defined from the following table:

Par. 100 Configuration

Unit

Open loop [0] Hz Speed reg, closed loop [1] rpm Process reg, closed loop [3] Par. 416

Description of choice:

The minimum reference is preset if the motor has to run at a minimum speed, regardless of whether the resulting reference is 0.

205

Maximum reference, Ref

MAX

(max.reference)

Value:

Par. 100 Config. = Open loop [0].Par. 204 Ref

- 1000.000 Hz

MIN

50.000 Hz

Par. 100 Config. = Closed loop [1]/ [3]. Par. 204 Ref

feedback

- Par. 415 Max.

MIN

50.000

rpm/par 416

Function:

The maximum reference gives the highest value that can be assumed by the sum of all references. If Closed loop [1]/[3] is selected in parameter 100 Configuration the maximum reference cannot exceed the value in parameter 415 Maximum feedback. Maximum reference is ignored if the local reference is active.

The reference unit can be defined from the following table:

Par. 100 Configuration

Unit Open loop [0] Hz Speed reg, closed loop [1] rpm Process reg, closed loop [3] Par. 416

Description of choice:

Maximum reference is set, if the speed of the motor is to be max. the set value, regardless of the whether the resulting reference is greater than the maximum reference.

206 Ramp type

(Ramp type)

Value:

Linear (Linear) [0]

Sine shaped (S-SHAPED) [1]

Sine

shaped (S-SHAPED 2) [2]

Programming

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VLT® 2800 Series

Function:

You can choose between a linear, a sine-shaped and

-shaped ramp process.

a sine

Description of choice:

Select the required ramp type depending on requirementsfor the acceleration/deceleration process.

207 Ramp-up time 1

(Ramp-up time 1)

Value:

0.02 - 3600.00 sec

3.00 sec (VLT 2803-2875)

10.00 sec (VLT 2880-2882)

Function:

The ramp-up time is the acceleration time from 0 Hz to the rated motor frequency f

frequency, f

). It is assumed that the output current

M,N

(parameter 104 Motor

M,N

will not reach the current limit (set in parameter 221

Current limit I

LIM

208 Ramp-down time 1

(ramp down time 1)

Value:

0.02 - 3600.00 sec

3.00 sec (VLT 2803-2875)

10.00 sec (VLT 2880-2882)

Function:

The ramp-down time is the deceleration time from the rated motor frequency f

quency, f

) to 0 Hz, provided no overvoltage arises

M,N

(parameter 104 Motor fre-

M,N

in the inverter because of generating operation of the motor.

Description of choice:

Set the required ramp-down time.

209 2 Ramp-up time

(2 Ramp-up time)

Value:

0.02 - 3600.00 sec.

3.00 sec (VLT 2803-2875)

10.00 sec (VLT 2880-2882)

Function:

See description of parameter 207 Ramp-up time 1.

Description of choice:

Set the required ramp-up time. Shift from ramp 1 to ramp 2 by activating Ramp 2 via a digital input.

210 2 Ramp-down time

(ramp down time 2)

Value:

0.02 - 3600.00 sec.

3.00 sec (VLT 2803-2875)

10.00 sec (VLT 2880-2882)

Function:

See description of parameter 208 Ramp-down time 1.

Description of choice:

Set the required ramp-down time. Shift from ramp 1 to ramp 2 by activating Ramp 2 via a digital input.

211 Jog ramp time

Description of choice:

Set the required ramp-up time.

Value:

0.02 - 3600.00 sec.

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54 MG.27.A2.22 - VLT® is a registered Danfoss trademark

(Jog ramp time)

3.00 sec (VLT 2803-2875)

VLT® 2800 Series

10.00 sec (VLT 2880-2882)

Function:

The jog ramp time is the acceleration/deceleration time from 0 Hz to the rated motor frequency f rameter 104 Motor frequency, f

). It is assumed that

M,N

(pa-

the output current will not reach the current limit (set in parameter 221 Current limit I

LIM

The jog ramp time starts if a jog-signal is given via the LCP control panel, one of the digital inputs or the serial communication port.

Description of choice:

Set the required ramp time.

213 Jog frequency

(Jog frequency)

Value:

0.0 - Par. 202 Output frequency high limit, f

MAX

10.0 Hz

Function:

Jog frequency f

means a fixed output frequency

JOG

that the variable frequency drive supplies to the motor when the Jog function is activated. Jog can be activated via the digital inputs, serial communication or via the LCP control panel, on the condition that this is active in parameter 015 Local jog.

Description of choice:

Set the required frequency.

214 Reference function

(Ref function)

Value:

Sum (sum) [0]

Relative (relative) [1]

External/preset (external/preset) [2]

Programming

212 Quick-stop ramp-down time

(Q STOP RAMP TIME)

Value:

0.02 - 3600.00 sec.

3.00 sec (VLT 2803-2875)

10.00 sec (VLT 2880-2882)

Function:

The quick-stop ramp-down time is the deceleration time from the rated motor frequency to 0 Hz, provided no overvoltage arises in the inverter because of generating operation of the motor, or if the generated current exceeds the current limit in parameter 221

Current limit I

. Quick-stop is activated via one of the

LIM

digital inputs or the serial communication.

Description of choice:

Set the required ramp-down time.

Function:

It is possible to define how preset references are to be added to the other references; for this purpose, use

Sum or Relative. It is also possible by using the External/preset to select whether a shift between external

references and preset references is required. External reference is the sum of the analog references, pulse references and any references from serial communication.

Description of choice:

If Sum [0] is selected, one of the adjusted preset references (parameters 215-218 Preset reference) is summarized as a percentage of the reference range (Ref

MIN

- Ref

), added to the other external referen-

MAX

ces. If Relative [1] is selected, one of the added preset references (parameters 215-218 Preset reference) is summarized as a percentage of the sum of present external references. If External/preset [2] is selected, it is possible via a digital input to shift between external references or preset

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MG.27.A2.22 - VLT® is a registered Danfoss trademark 55

VLT® 2800 Series

references. Preset references will be a percentage value of the reference range.

NOTE

If Sum or Relative is selected, one of the preset references will always be active. If the preset references are to be without influence, they must be set to 0% (factory setting).

215 Preset reference 1 (PRESET REF. 1) 216 Preset reference 2 (PRESET REF. 2) 217 Preset reference 3 (PRESET REF. 3)

218 Preset reference 4 (PRESET REF. 4)

Value:

-100.00% - +100.00%

0.00%

of the reference range/external reference

Function:

Four different preset references can be programmed in parameters 215-218 Preset reference. The preset reference is stated as a percentage of the reference range (Ref

MIN

- Ref

) or as a percentage

MAX

of the other external references, depending on the choice made in parameter 214 Reference function. The choice between preset references can be made via the digital inputs or via serial communication.

Preset ref., msb Preset ref. lsb

0 0 Preset ref. 1 0 1 Preset ref. 2 1 0 Preset ref. 3 1 1 Preset ref. 4

Description of choice:

Set the preset reference(s) that is/are to be the options.

219 Catch up/Slow down reference

(Catch up/Slw dwn)

Value:

0.00 - 100% of the given reference

0.00%

Function:

In this parameter, the percentage value can be set which will either be added to or deducted from the remote-controlled references.

The remote-controlled reference is the sum of preset references, analog references, pulse reference and any references from serial communication.

Description of choice:

If Catch up is active via a digital input, the percentage value in parameter 219 Catch up/Slow down refer- ence will be added to the remote-controlled reference. If Slow down is active via a digital input, the percentage value in parameter 219 Catch up/Slow down refer- ence will be deducted from the remote-controlled reference.

221

Current limit, I

LIM

(current limit)

Value:

0 - XXX.X % of par. 105

160 %

Function:

In this parameter, the maximum output current I

LIM

is set. The factory-set value corresponds to the maximum output current I

. If the current limit is to be

MAX

used as motor protection, set the rated motor current. f the current limit is set above 100% (the rated output current of the variable frequency drive, I

), the vari-

INV.

able frequency drive can only handle a load intermittently, i.e. for short periods at a time. After the load has been higher than I period the load is lower than I the current limit is set at a lower value than I

, it must be ensured that for a

INV.

. Please note that if

INV

INV.

, the

acceleration torque will be reduced to the same extent.

Description of choice:

Set the required maximum output current I

223

Warning: Low current, I

LOW

LIM

(warn. current lo)

Value:

0.0 - par. 224 Warning: High current, I

HIGH

0.0 A

Function:

If the output current falls below the preset limit I

LOW

warning is given.

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56 MG.27.A2.22 - VLT® is a registered Danfoss trademark

VLT® 2800 Series

Parameters 223-228 Warning functions are out of function during ramp-up after a start command and after a stop command or during stop. The warning functions are activated when the output frequency reaches the resulting reference. The signal outputs can be programmed to give a warning signal via terminal 46 and via the relay output.

Description of choice:

The lower signal limit of the output current I

LOW

must be programmed within the normal working range of the unit.

225

Warning: Low frequency, f

LOW

(warn.freq. low)

Value:

0.0 - par. 226

Warn.: High frequency, f

HIGH

0.0 Hz

Function:

If the output frequency falls below the preset limit f

, a warning is given.

LOW

Parameters 223-228 Warning functions are out of function during ramp-up after a start command and after stop command or during stop. The warning functions are activated when the output frequency has reached the resulting reference. The signal outputs can be programmed to give a warning signal via terminal 46 and via the relay output.

Description of choice:

The lower signal limit of the output frequency f

LOW

must be programmed within the normal operating range of the variable frequency drive. See drawing at parameter 223 Warning: Low current, I

LOW

224

Warning: High current, I

HIGH

(warn. current hi)

Value:

0 - I

MAX

Function:

If the output current exceeds the preset limit I

HIGH

a warning is given. Parameters 223-228 Warning functions do not work during ramp-up after a start command and after stop command or during stop. The warning functions are activated when the output frequency has reached the resulting reference. The signal outputs can be programmed to give a warning signal via terminal 46 and via the relay output.

Description of choice:

The output current's upper signal limit I

HIGH

must be programmed within the variable frequency drive's normal operating range. See drawing at parameter 223

Warning: Low current, I

LOW

226

Warning: High frequency f

HIGH

(warn.freq.high)

Value:

Par. 200 Frequency range = 0-132 Hz [0]/[1].par. 225 f

- 132 Hz

LOW

132.0 Hz

Par. 200 Frequency range = 0-1000 Hz [2]/[3].par. 225 f

- 1000 Hz

LOW

132.0 Hz

Function:

If the output frequency exceeds the preset limit f

HIGH

warning is given. Parameters 223-228 Warning functions do not work during ramp-up after a start command and after stop command or during stop. The warning functions are activated when the output frequency has reached the resulting reference. The signal outputs can be programmed to give a warning signal via terminal 46 and via the relay output.

Description of choice:

The output frequency's upper signal limit f

HIGH

must be programmed within the variable frequency drive's normal operating range. See drawing at parameter 223

Warning: Low current, I

LOW

Programming

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VLT® 2800 Series

227

Warning: Low feedback, FB

LOW

(warn.feedb. low)

Value:

-100,000.000 - par. 228 Warn.: FB

HIGH

-4000.000

Function:

If the feedback signal falls below the preset limit

, a warning is given.

LOW

Parameters 223-228 Warning functions are out of function during ramp-up after a start command and after a stop command or during stop. The warning functions are activated when the output frequency has reached the resulting reference.The signal outputs can be programmed to give a warning signal via terminal 46 and via the relay output.The unit for feedback in Closed loop is programmed in parameter 416 Proc- ess units.

Description of choice:

Set the required value within the feedback range (parameter 414 Minimum feedback, FB

imum feedback, FB

228

Warning: High feedback, FB

MAX

and 415 Max-

MIN

HIGH

(warn.feedb high)

Value:

Par. 227 Warn.: FB

- 100,000.000

LOW

4000.000

Function:

If the feedback signal gets above the preset limit

, a warning is given.

HIGH

Parameters 223-228 Warning functions are out of function during ramp-up after a start command and after a stop command or during stop. The warning functions are activated when the output frequency has reached the resulting reference. The signal outputs can be programmed to give a warning signal via terminal 46 and via the relay output. The unit for feedback in Closed loop is programmed in parameter 416 Proc- ess units.

229 Frequency bypass, bandwidth

(FREQ BYPASS B.W.)

Value:

0 (OFF) - 100 Hz

0 Hz

Function:

Some systems call for some output frequencies to be avoided because of mechanical resonance problems in the system. In parameters 230-231 Frequency by- pass, these output frequencies can be programmed. In this parameter, a bandwidth can be defined on either side of these frequencies.

Description of choice:

The frequency set in this parameter will be centered around parameters 230 Frequency bypass 1 and 231 Frequency bypass 2.

230 Frequency bypass 1 (FREQ. BYPASS 1) 231 Frequency bypass 2 (FREQ. BYPASS 2)

Value:

0 - 1000 Hz

0.0 Hz

Function:

Some systems call for some output frequencies to be avoided because of mechanical resonance problems in the system.

Description of choice:

Enter the frequencies to be avoided. See also parameter 229 Frequency bypass, bandwidth.

Description of choice:

Set the required value within the feedback range (parameter 414 Minimum feedback, FB

imum feedback, FB

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58 MG.27.A2.22 - VLT® is a registered Danfoss trademark

MAX

and 415 Max-

MIN

VLT® 2800 Series

Inputs and Outputs

Digital inputs Term. no.

par. no. 302 303 304 305 307 Value: No function (NO OPERATION) [0] [0] [0] [0]

Reset (RESET) [1] [1] [1] [1] [1] Coasting stop inverse (MOTOR COAST INVERSE) [2] [2] [2] [2] [2] Reset and coasting inverse (RESET AND COAST INV.) [3] [3]

Quick-stop inverse (QUICK-STOP INVERSE) [4] [4] [4] [4] [4] DC braking inverse (DC BRAKE INVERSE) [5] [5] [5] [5] [5] Stop inverse (STOP INVERSE) [6] [6] [6] [6] [6] Start (START)

[7] Pulse start (LATCHED START) [8] [8] [8] [8] [8] Reversing (REVERSING) [9]

Reversing and start (START REVERSING) [10] [10] [10] [10] [10] Start clockwise (ENABLE FORWARD) [11] [11] [11] [11] [11] Start counter-clockwise (ENABLE REVERSE) [12] [12] [12] [12] [12] Jog (JOGGING) [13] [13] [13]

Freeze reference (FREEZE REFERENCE) [14] [14] [14] [14] [14] Freeze output frequency (FREEZE OUTPUT) [15] [15] [15] [15] [15] Speed up (SPEED UP) [16] [16] [16] [16] [16] Slow (SLOW) [17] [17] [17] [17] [17] Catch-up (CATCH-UP) [19] [19] [19] [19] [19] Slow-down (SLOW-DOWN) [20] [20] [20] [20] [20] Ramp 2 (RAMP 2) [21] [21] [21] [21] [21] Preset ref, LSB (PRESET REF, LSB) [22] [22] [22] [22] [22] Preset ref, MSB (PRESET REF, MSB) [23] [23] [23] [23] [23] Preset reference on (PRESET REFERENCE ON) [24] [24] [24] [24] [24] Thermistor (THERMISTOR) [25] [25] [25] [25] Precise stop, inverse (PRECISE STOP INV.) [26] [26] Precise start/stop (PRECISE START/STOP) [27] [27] Pulse reference (PULSE REFERENCE) [28] Pulse feedback (PULSE FEEDBACK) [29] Pulse input (PULSE INPUT) [30] Selection of Set-up, lsb (SET-UP SELECT LSB) [31] [31] [31] [31] [31] Selection of Set-up, msb (SET-UP SELECT MSB) [32] [32] [32] [32] [32] Reset and start (RESET AND START) [33] [33] [33] [33] [33] Pulse counter start (PULSE COUNTER START) [34] [34]

27 29 33

[3] [3]

[3]

[7] [7] [7] [7]

[9] [9] [9]

[9]

[13]

[0]

Programming

1. All functions on terminals 18 and 19 are controlled by an interrupter, which means that the repetitive accuracy of the response time is constant. Can be used for start/stop, set-up switch, and especially for chang-

Function:

In these parameters, 302-307 Digital inputs, it is possible to choose between the different enabled functions related to the digital inputs (terminals 18-33).

ing digital preset, i.e., to obtain a reproducible stop point when using creep speed. For further information, see VLT 2800 Precise Stop Instruction, MI.28.CX.02.

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MG.27.A2.22 - VLT® is a registered Danfoss trademark 59

Description of choice:

No operation is selected if the adjustable frequency drive is not to react to signals transmitted to the terminal.

Reset resets the adjustable frequency drive after an alarm; however, a few alarms cannot be reset (trip locked) without first disconnecting the line supply and reconnecting it. See table under List of warnings and alarms. Reset is activated on the leading edge of the signal.

Coasting stop inverse is used for making the adjustable frequency drive "let go" of the motor immediately (output transistors are "turned off"), which means that the motor runs freely to a stop. Logic '0' leads to coasting to stop.

Reset and coasting inverse are used to activate motor coast simultaneously with reset. Logical '0' means motor coast stop and reset. Reset is activated on the falling edge.

Quick stop inverse is used for activating the quick stop ramp-down set in parameter 212 Quick stop ramp-

down time. Logic '0' leads to quick stop.

DC braking inverse is used for stopping the motor by

energizing it with a DC voltage for a given time; see parameters 126, 127 and 132 DC brake. Please note that this function is only active if the value in parameter 126 DC braking time and 132 DC brake voltage is dif- ferent from 0. Logic '0' leads to DC braking.

VLT® 2800 Series

Latched start - if a pulse is applied for at least 14 ms, the adjustable frequency drive will start the motor, provided no stop command has been given. The motor can be stopped by briefly activating Stop inverse.

Reversing is used for changing the direction of rotation of the motor shaft. Logic '0' will not lead to reversing. Logic '1' will lead to reversing. The reverse signal only changes the direction of rotation, it does not activate the start. Is not active at Process regulation, closed-

loop. See also parameter 200 Output frequency range/ direction.

Reversing and start is used for start/stop and for re-

versing with the same signal. No active start command is allowed at the same time. Acts as latch start reversing, provided latch start has been chosen for terminal

18. Is not active for Process regulation, closed-loop. See also parameter 200 Output frequency range/di-

rection.

Start clockwise is used if you want the motor shaft only

to be able to rotate clockwise when started. Should not be used for Process regulation, closed-loop.

Stop inverse, a logic '0' means that the motor speed is ramped down to stop via the selected ramp.

None of the stop commands mentioned above are to be used as repair switches. Note that the adjustable frequency drive has more voltage inputs than L1, L2 and L3 when the DC bus terminals are used. Make sure that all voltage inputs are disconnected and that the prescribed time (4 minutes.) has passed before repair work is commenced.

Start is selected if a start/stop command is required. Logic '1' = start, logic '0' = stop.

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60 MG.27.A2.22 - VLT® is a registered Danfoss trademark

Start counter-clockwise is used if you want the motor shaft only to be able to rotate counter-clockwise when started. Should not be used for Process regulation,

closed-loop. See also parameter 200 Output frequency range/direction.

Jog is used to override the output frequency to the jog frequency set in parameter 213 Jog frequency. Jog is active regardless of whether a start command has been given, yet not when Coast stop, Quick stop or DC

braking are active.

Freeze reference freezes the present reference. The reference can now only be changed via Speed up and Slow. If freeze reference is active, it will be saved after

a stop command and in the event of line failure.

Freeze output freezes the present output frequency (in Hz). The output frequency can now only be changed via Speed up and Slow.

VLT® 2800 Series

NOTE

If Freeze output is active, the adjustable frequency drive can only be stopped by selecting Motor coast, Quick stop, or DC

braking via a digital input.

Speed up and Slow are selected if digital control of the

up/down speed is required. This function is only active if Freeze reference or Freeze output frequency has been selected. If Speed up is active, the reference or output frequency will be increased; and if Slow is active, the reference or output frequency will be reduced. The output frequency is changed via the preset ramp times in parameters 209-210 Ramp 2. One pulse (logic '1' minimum high for 14 ms and a minimum break time of 14 ms) will lead to a speed change of 0.1% (reference) or 0.1 Hz (output frequency). Example:

Term.33Freeze ref/

Term

.29

0 0 1 No speed change 0 1 1

freeze outp.

1 1 Speed up 0 1Slow 1 1Slow

Function

Preset ref.

msb

0 0 Preset ref. 1 0 1 1

Preset reference on is used for shifting between a remote-controlled reference and a preset reference. It is assumed that External/preset [2] has been selected in parameter 214 Reference function. Logic '0' means that remote-controlled references are active, while logic '1' means that one of the four preset references is active, as can be seen from the table above.

Thermistor is to be selected if a possibly integrated thermistor in the motor is to be able to stop the adjustable frequency drive if the motor overheats. The cutout value is 3 k.

Preset ref.

lsb

1 Preset ref. 2 0 Preset ref. 3 1 Preset ref. 4

Function

Programming

Freeze reference can be changed even if the adjustable frequency drive has stopped. The reference will also be saved if line power is disconnected.

Catch-up/Slow-down is selected if the reference value is to be increased or reduced by a programmable percentage value set in parameter 219 Catch-up/Slow- down reference.

Slow-down

0 0 Unchanged speed 0 1 1

Ramp 2 is selected if a shift between ramp 1 (parameters 207-208) and ramp 2 (parameters 209-210) is required. Logic '0' leads to ramp 1 and logic '1' leads to ramp 2.

Preset reference, lsb and Preset reference, msb makes it possible to select one of the four preset references; see the table below:

Catch-up Function

1 Increase by % value 0 Reduce by % value 1 Reduce by % value

If a motor features a Klixon thermal switch instead, this can also be connected to the input. If motors operate in parallel, the thermistors/thermal switches can be connected in series (total resistance lower than 3 k). Parameter 128 Motor thermal protection must be programmed for Thermistor warning [1] or Thermistor trip [2], and the thermistor is to be connected between a digital input and terminal 50 (+10 V supply).

Precise stop, inverse is selected to obtain a high degree of accuracy when a stop command is repeated. A logic 0 means that the motor speed is ramped down to stop via the selected ramp.

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VLT® 2800 Series

Precise start/stop is selected to obtain a high degree of accuracy when a start and stop command is repeated.

Pulse reference is selected if the reference signal applied is a pulse train (frequency). 0 Hz corresponds to parameter 204 Minimum reference, Ref

. The fre-

MIN

quency, set in parameter 327 Pulse reference/feedback, corresponds to parameter 205 Maximum reference Ref

MAX

Pulse feedback is selected if the feedback signal used is a pulse train (frequency). In parameter 327 Pulse reference/feedback, the maximum pulse feedback fre-

quency is set.

Pulse input is selected if a specific number of pulses must lead to a Precise stop; see parameter 343 Precise

stop and parameter 344 Counter value.

Selection of Set-up, lsb and Selection of Set-up, msb

provides the option of selecting one of the four set-ups. It is, however, a condition that parameter 004 is set to

Multi-set-up.

Reset and start can be used as a start function. If 24 V

are connected to the digital input, this will cause the adjustable frequency drive to reset, and the motor will ramp up to the preset reference.

Pulse counter start is used to start a counter stop sequence with a pulse signal. The pulse width must be at least 14 ms and not longer than the count period. See also parameter 343 and the instruction, MI28CXYY.

308 Terminal 53, analogue input voltage

(AI [V]53FUNCT.)

Value:

No function (NO OPERATION) [0]

Reference (reference) [1]

Feedback (feedback) [2]

Wobble (WOBB.DELTA FREQ [%]) [10]

Function:

In this parameter, it is possible to select the function required to be connected to terminal 53. Scaling of the input signal is made in parameter 309 Terminal 53, min. scaling and parameter 310 Terminal 53, max. scaling.

Description of choice:

No function [0]. Is selected if the adjustable frequency drive is not to react to signals connected to the terminal. Reference [1]. If this function is selected, the reference can be changed by means of an analog reference signal. If reference signals are connected to more than one input, these reference signals must be added up.If a voltage feedback signal is connected, select Feedback [2] on terminal 53. Wobble [10] The delta frequency can be controlled by the analog input. If WOBB.DELTA FREQ is selected as analog input (par. 308 or par. 314) the value selected in par. 702 equals 100 % analog input. Example: Analog input = 4-20 mA, Delta freq. par. 702 = 5 Hz • 4 mA = 0 Hz and 20 mA = 5 Hz. If this function is chosen, see Wobble Instruction MI28JXYY for further information.

309 Terminal 53 Min. scaling

(AI 53 SCALE LOW)

Value:

0.0 - 10.0 Volt

0.0 Volt

Function:

This parameter is used for setting the signal value that is to correspond to the minimum reference or the minimum feedback, parameter 204 Minimum reference,

/ 414 Minimum feedback, FB

Ref

MIN

Description of choice:

Set the required voltage value. For reasons of accuracy, compensation should be made for voltage loss in long signal cables. If the Time out function is to be used (parameter 317 Time out and 318 Function after time out), the value set must be higher than 1 Volt.

310 Terminal 53 Max. scaling

(AI 53 SCALE HIGH)

Value:

0 - 10.0 Volt

10.0 Volt

Function:

This parameter is used for setting the signal value that is to correspond to the maximum reference value or

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VLT® 2800 Series

maximum feedback, parameter 205 Maximum reference, Ref

/ 414 Maximum feedback, FB

MAX

Description of choice:

Set the required voltage value. For reasons of accuracy, compensation should be made for voltage losses in long signal cables.

314 Terminal 60, analogue input current

(AI [mA] 60 FUNCT)

Value:

No function (no operation) [0]

Reference (reference) [1]

Feedback (feedback) [2]

Wobble (WOBB.DELTA FREQ [%]) [10]

Function:

This parameter allows a choice between the different functions available for the input, terminal 60. Scaling of the input signal is effected in parameter 315 Terminal

60, min. scaling and parameter 316 Terminal 60, max. scaling.

Description of choice:

Feedback [2] on terminal 60. Wobble [10]

The delta frequency can be controlled by the analog input. If WOBB.DELTA FREQ is selected as analog input (par. 308 or par. 314) the value selected in par. 702 equals 100 % analog input. Example: Analog input = 4-20 mA, Delta freq. par. 702 = 5 Hz • 4 mA = 0 Hz and 20 mA = 5 Hz. If this function is chosen, see Wobble Instruction MI28JXYY for further information.

315 Terminal 60 Min. scaling

(AI 60 SCALE LOW)

Value:

0.0 - 20.0 mA

4.0 mA

Function:

In this parameter, you can set the signal value that will correspond to the minimum reference or minimum feedback, parameter 204 Minimum reference, Ref 414 Minimum feedback, FB

MIN

Description of choice:

Set the required current value. If the Timeout function is to be used (parameter 317 Time out and 318 Func- tion after time out ), the value set must be higher than 2 mA.

316 Terminal 60 Max. scaling

(AI 60 SCALE HIGH)

Value:

0.0 - 20.0 mA

20.0 mA

Function:

This parameter is used for setting the signal value that is to correspond to the maximum reference value, parameter 205 Maximum reference value, Ref

MAX

Description of choice:

Set the required current value.

317 Time out

(LIVE ZERO TIME O)

Value:

1 - 99 sec.

10 sec.

Function:

If the signal value of the reference or feedback signal connected to one of the input terminals 53 or 60 falls below 50 % of the minimum scaling for a period longer than the time set, the function selected in parameter 318 Function after time out will be activated. This function is only active if in parameter 309 Terminal 53, min. scaling a value higher than 1 Volt has been selected, or if in parameter 315 Terminal 60, min. scaling a value higher than 2 mA has been selected.

Programming

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VLT® 2800 Series

Description of choice:

Set the required time.

318 Function after time out

(LIVE ZERO FUNCT.)

Value:

No operation (NO OPERATION) [0]

Freeze output frequency (FREEZE OUTPUT FREQ.) [1]

Stop (stop) [2]

Jog (jog) [3]

Max. speed (MAX SPEED) [4]

Stop and trip (STOP AND TRIP) [5]

Function:

This parameter allows a choice of the function to be activated after the expiry of the Time out (parameter 317 Time out ). If a time-out function occurs at the same time as a bus time-out function (parameter 513 Bus time interval function ), the time-out function in parameter 318 will be activated.

Description of choice:

The output frequency of the adjustable frequency drive can be:

frozen at the present frequency [1]

overruled to stop [2]

(fb min-max = 4-20 mA)

Output frequency 0-max 0-20 mA (0-fmax = 0-20 mA) [5]

Output frequency 0-max 4-20 mA (0-fmax = 4-20 mA) [6]

Output current 0-I

0-20 mA

INV

(0-iinv = 0-20 mA) [7]

Output current 0-I

4-20 mA

IINV

(0-iinv = 4-20 mA) [8]

Output power 0-P

0-20 mA

M,N

(0-Pnom = 0-20 mA) [9]

Output power 0-P

4-20 mA

M,N

(0-Pnom = 4-20 mA) [10]

Inverter temperature 68-212 °F [20-100 °C] 0-20 mA (TEMP 20-100 C=0-20 mA) [11]

Inverter temperature 68-212 °F [20-100 °C] 4-20 mA (TEMP 20-100 C=4-20 mA) [12]

Function:

The analog output can be used for stating a process value. It is possible to choose two types of output signals 0-20 mA or 4-20 mA. If used as a voltage output (0-10 V), a pull-down resistor of 500  must be fitted to common (terminal 55). If the output is used as a current output, the resulting resistance from the equipment connected may not exceed 500 .

overruled to jog frequency [3]

Description of choice:

overruled to max. output frequency [4]

overruled to stop with subsequent trip [5]

No function. Is selected if the analog output is not to be used.

External Ref

MIN

- Ref

0-20 mA/4-20 mA.

MAX

An output signal is obtained, which is proportional to

319 Analog output terminal 42

(AO 42 FUNCTION)

Value:

No function (NO OPERATION) [0]

External reference min.-max. 0-20 mA (ref min-max = 0-20 mA) [1]

External reference min.-max. 4-20 mA (ref min-max = 4-20 mA) [2]

Feedback min.-max. 0-20 mA

the resulting reference value in the interval Minimum reference, Ref

- Maximum reference, Ref

MIN

MAX

(pa-

rameters 204/205).

-FB

MIN

0-20 mA/ 4-20 mA.

MAX

An output signal is obtained, which is proportional to the feedback value in the interval Minimum feedback, FB

- Maximum feedback, FB

MIN

(parameter

MAX

414/415).

0-20 mA/4-20 mA.

0-f

MAX

(fb min-max = 0-20 mA) [3]

Feedback min.-max. 4-20 mA [4]

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VLT® 2800 Series

An output signal is obtained, which is proportional to the output frequency in the interval 0 - f 202 Output frequency, high limit, f

0-20 mA/4-20 mA.

0 - I

INV

MAX

(parameter

An output signal is obtained, which is proportional to the output current in the interval 0 - I

0 - P

0-20 mA/4-20 mA.

M,N

INV

An output signal is obtained, which is proportional to the present output power. 20 mA corresponds to the value set in parameter 102 Motor power, P

0 - Temp.

0-20 mA/4-20 mA.

MAX

M,N

An output signal is obtained, which is proportional to the present heatsink temperature. 0/4 mA corresponds to a heatsink temperature of less than 68 °F [20 °C], and 20 mA corresponds to 100 °C.

323 Relay output 1-3

(RELAY 1-3 FUNCT.)

Value:

No function (no operation) [0]

Unit ready (unit ready) [1]

Enable/no warning (enable/no warning) [2]

Running (RUNNING) [3]

Running in reference, no warning (run on ref/no warn) [4]

Running, no warnings (RUNNING/NO WARNING) [5]

Running in reference range, no warnings (RUN IN RANGE/ NO WARN) [6]

Ready - AC line voltage within range (RDY NO OVER/UNDERVOL) [7]

Alarm or warning (ALARM OR WARNING) [8]

Current higher than current limit, par. 221 (Current limit) [9]

Alarm (ALARM) [10]

Output frequency higher than f

par. 225

LOW

(above frequency low) [11]

Output frequency lower than f

HIGH

par. 226

(below frequency high) [12]

Output current higher than I

LOW

par. 223

(above current low) [13]

Output current lower than I

HIGH

par. 224

(below current high) [14]

Feedback higher than FB

LOW

par. 227

(above feedback low) [15]

Feedback lower than FB

HIGH

par. 228

(under feedback high) [16]

Relay 123 (RELAY 123) [17]

Reversing (REVERSE) [18]

Thermal warning (THERMAL WARNING) [19]

Local operation (LOCAL MODE) [20]

Out of frequency range par. 225/226 (out of freq. range) [22]

Out of current range (out of current range) [23]

Out of feedback range (out of fdbk. range) [24]

Mechanical brake control (Mech. brake control) [25]

Control word bit 11 (control word bit 11) [26]

Function:

The relay output can be used for giving the present status or warning. The output is activated (1-2 make) when a given condition is fulfilled.

Description of choice:

No function is selected if the adjustable frequency drive is not to react to signals.

Unit ready: there is a supply voltage on the control card of the adjustable frequency drive, and the adjustable frequency drive is ready for operation.

Enable, no warning: the adjustable frequency drive is ready for operation, but no start command has been given. No warning.

Running is active when there is a start command or the output frequency is above 0.1 Hz. Also active during ramp-down.

Running in reference, no warning: speed according to reference.

Running, no warning: a start command has been given. No warning.

Ready - line voltage within range: the adjustable frequency drive is ready for use, the control card is receiving supply voltage, and there are no active control signals on the inputs. The AC line voltage lies within the voltage limits.

Programming

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VLT® 2800 Series

Alarm or warning: the output is activated by an alarm or warning.

Current limit: the output current is higher than the value programmed in parameter 221 Current limit I

LIM

Alarm: the output is activated by an alarm.

Output frequency higher than f

: the output frequen-

LOW

cy is higher than the value set in parameter 225

Warning: Low frequency, f

Output frequency lower than f

LOW

: the output frequen-

HIGH

cy is lower than the value set in parameter 226 Warning: High frequency, f

Output current higher than I

HIGH

: the output current is

LOW

higher than the value set in parameter 223 Warning: Low current, I

Output current lower than I

LOW

: the output current is

HIGH

lower than the value set in parameter 224 Warning: High current, I

Feedback higher than FB

HIGH

: the feedback value is

LOW

higher than the value set in parameter 227 Warning: Low feedback, FB

Feedback lower than FB

LOW

: the feedback value is

HIGH

lower than the value set in parameter 228 Warning: High current, I

HIGH

Relay 123 is only used in connection with Profidrive.

Reversing: the relay output is activated when the di-

rection of motor rotation is counter-clockwise. When the direction of motor rotation is clockwise, the value is 0 V DC.

Thermal warning: above the temperature limit in either the motor or the adjustable frequency drive, or from a thermistor connected to a digital input.

Local operation: the output is active when in parameter 002 Local/remote operation, Local operation [1] has been selected.

Mechanical brake control: enables you to control an external mechanical brake (see section about control of mechanical brake in the VLT 2800 Design Guide).

327 Pulse/reference feedback

(PULSE REF/FB MAX)

Value:

150 - 67600 Hz

5000 Hz

Function:

This parameter is used for setting the signal value that corresponds to the maximum value set in parameter 205 Maximum reference, Ref

or to the maximum

MAX

feedback value set in parameter 415 Maximum feedback, FB

MAX

Description of choice:

Set the required pulse reference or pulse feedback to be connected to terminal 33.

328 Maximum Pulse 29

(MAX PULSE 29)

Value:

150 - 67600 Hz

5000 Hz

Function:

This parameter is used for setting the signal value that corresponds to the maximum value set in parameter 205 Maximum reference, Ref

or to the maximum

MAX

feedback value set in parameter 415 Maximum feedback, FB

MAX

NOTE

Only relevant for DeviceNet. See MG90BXYY for further information.

Out of the frequency range: the output frequency is out of the programmed frequency range in parameters 225 and 226.

Out of the current range: the motor current is out of the programmed range in parameters 223 and 224.

Out of the feedback range: the feedback signal is out of the programmed range in parameters 227 and 228.

341 Digital / pulse output terminal 46

(DO 46 FUNCTION)

Value:

Unit ready (Unit ready) [0]

Parameter [0] - [20] see parameter 323

Pulse reference (PULSE REFERENCE) [21]

Parameter [22] - [25] see parameter 323

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66 MG.27.A2.22 - VLT® is a registered Danfoss trademark

VLT® 2800 Series

Pulse feedback (PULSE FEEDBACK) [26]

Output frequency (PULSE OUTPUTFREQ) [27]

Pulse current (PULSE CURRENT) [28]

Pulse power (PULSE POWER) [29]

Pulse temperature (PULSE TEMP) [30]

Function:

The digital output can be used for giving the present status or warning. The digital output (terminal 46) gives a 24 V DC signal when a given condition is fulfilled. Terminal can also be used for frequency output. Parameter 342 sets the maximum pulse frequency.

Description of choice:

Pulse reference Ref

MIN

- Ref

MAX

An output signal is obtained, which is proportional to the resulting reference value in the interval Minimum reference, Ref

- Maximum reference, Ref

MIN

MAX

(pa-

rameters 204/205).

Pulse feedback FB

MIN

-FB

MAX

An output signal is obtained, which is proportional to the feedback value in the interval Minimum feedback, FB

- Maximum feedback, FB

MIN

(parameter

MAX

414/415).

Output frequency 0-f

MAX

An output signal is obtained, which is proportional to the output frequency in the interval 0 - f 202 Output frequency, high limit, f

Pulse current 0 - I

INV.

MAX

(parameter

MAX

An output signal is obtained, which is proportional to the output current in the interval 0 - I

Pulse power 0 - P

M,N

INV

An output signal is obtained, which is proportional to the present output power. Par. 342 corresponds to the value set in parameter 102 Motor power, P

Pulse temperature 0 - Temp.

MAX

M,N

An output signal is obtained, which is proportional to the present heatsink temperature. 0 Hz corresponds to a heatsink temperature of less than 68 °F (20° C), and 20 mA corresponds to 212 °F (100° C).

NOTE

Output terminal 46 is not available on DeviceNet. Minimum output frequency at frequency output = 16 Hz

342 Terminal 46, max. pulse scaling

(DO 46 MAX. PULS)

Value:

150 - 10000 Hz

5000 Hz

Function:

This parameter is used for setting the pulse output signal's maximum frequency.

Description of choice:

Set the required frequency.

343 Precise stop function

(Precise stop)

Value:

Precise ramp stop (normal) [0]

Counter stop with reset (Count stop reset) [1]

Counter stop without reset (Count stop no reset) [2]

Speed-compensated stop (Spd cmp stop) [3]

Speed-compensated counter stop with reset (Spd cmp cstop w. res) [4]

Speed-compensated counter stop without reset (Spd cmp cstop no res) [5]

Function:

In this parameter you select which stop function is performed in response to a stop command. All six data selections contain a precise stop routine, thus ensuring a high level of repeat accuracy. The selections are a combination of the functions described below.

NOTE

Pulse start [8] may

not be used together

with the precise stop function.

Description of choice:

Precise ramp stop [0] is selected to achieve high repetitive precision at the stopping point. Counter stop. Once it has received a pulse start signal the adjustable frequency drive runs until the number of pulses programmed by the user have been received at input terminal 33. In this way an internal stop signal

Programming

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VLT® 2800 Series

will activate the normal ramp down time (parameter

208). The counter function is activated (starts timing) at the flank of the start signal (when it changes from stop to start). Speed compensated stop. To stop at precisely the same point, regardless of the present speed, a stop signal received is delayed internally when the present speed is lower than the maximum speed (set in parameter 202). Reset. Counter stop and Speed-compensated stop can be combined with or without reset. Counter stop with reset [1]. After each precise stop the number of pulses counted during ramp down 0 Hz is reset. Counter stop without reset [2]. The number of pulses counted during ramp down to 0 Hz is deducted from the counter value in parameter 344.

344 Counter value

(Pulse count pre.)

Value:

0 - 999999

Function:

In this parameter, you can select the counter value to be used in the integrated precise stop function (parameter 343).

100,000 pulses

Description of choice:

The factory setting is 10 ms. This means that it is assumed that the total delay from the Sensor, PLC and other hardware corresponds to this setting.

NOTE

Only active for speed-compensated stop.

Description of choice:

The factory setting is 100,000 pulses. The highest frequency (max. resolution) that can be registered at terminal 33 is 67.6 kHz.

349 Speed comp delay

(SPEED COMP DELAY)

Value:

0 ms - 100 ms

Function:

In this parameter the user can set the system's delay time (Sensor, PLC, etc.). If you are running speedcompensated stop, the delay time at different frequencies has a major influence on the way in which you stop.

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68 MG.27.A2.22 - VLT® is a registered Danfoss trademark

10 ms

VLT® 2800 Series

Special functions

400 Brake function

(Brake function)

Value:

Off (off) [0]

Resistor brake (Resistor) [1]

AC brake (AC Brake) [4]

Load sharing (load sharing) [5]

Factory setting depends on unit type.

Function:

Resistor brake [1] is selected if the adjustable frequency drive has an integral brake transistor and brake resistor is connected to terminals 81, 82. A higher intermediate circuit voltage is permitted during braking (generated operation) when a brake resistor is connected. AC brake [4] can be selected to improve braking without using brake resistors. Please note that AC brake [4] is not as effective as Resistor brake [1].

Description of choice:

Select Resistor brake [1] if a brake resistor is connected. Select AC brake [4] if short-term generated loads occur. See parameter 144 Gain AC brake to set the brake.

Select Load sharing [5] if this is used.

NOTE

A change of selection will not become active until the mains voltage has been disconnected and reconnected.

405 Reset function

(reset mode)

Value:

Manual reset (manual reset) [0]

Automatic reset x 1 (AUTOMATIC x 1) [1]

Automatic reset x 3 (AUTOMATIC x 3) [3]

Automatic reset x 10 [10]

(AUTOMATIC x 10)

Reset at power-up (RESET AT POWER UP) [11]

Function:

This parameter makes it possible to select whether reset and restart after a trip are to be manual or whether the adjustable frequency drive is to be reset and restarted automatically. Furthermore, it is possible to select the number of times a restart is to be attempted. The time between each attempt is set in parameter 406 Automatic restart time.

Description of choice:

If Manual reset [0] is selected, reset is to be carried out via the [STOP/RESET] key, a digital input or serial communication. If the adjustable frequency drive is to carry out an automatic reset and restart after a trip, select data value [1], [3] or [10]. If Reset at power-up [11] is selected, the adjustable frequency drive will carry out a reset if there has been a fault in connection with the mains failure.

The motor may start without warning.

406 Automatic restart time

(autorestart time)

Value:

0 - 10 sec.

5 sec.

Function:

This parameter allows setting of the time from tripping until the automatic reset function begins. It is assumed that automatic reset has been selected in parameter 405 Reset function.

Description of choice:

Set the required time.

409

Trip delay overcurrent, I

LIM

(trip delay cur.)

Value:

0 - 60 sec. (61=OFF)

OFF

Programming

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MG.27.A2.22 - VLT® is a registered Danfoss trademark 69

Function:

When the adjustable frequency drive registers that the output current has reached the current limit I

LIM

(parameter 221 Current limit) and remains there for the preset time, it is disconnected. Can be used to protect the application, like the ETR will protect the motor if selected.

Description of choice:

Select how long the adjustable frequency drive should maintain the output current at the current limit I

LIM

be-

fore it disconnects. At OFF parameter 409 Trip delay

overcurrent, I

is not working, i.e. disconnection will

LIM

not take place.

411 Switching frequency

(Switch freq.)

Value:

3000 - 14000 Hz (VLT 2803 - 2875)

3000 - 10000 Hz (VLT 2880 - 2882)

4500 Hz

Function:

The set value determines the switching frequency of the inverter. If the switching frequency is changed, this may help to minimise possible acoustic noise from the motor.

NOTE

The output frequency of the adjustable frequency drive can never assume a value higher than 1/10 of the switching frequency.

Description of choice:

When the motor is running, the switching frequency is adjusted in parameter 411 Switching frequency until the frequency has been obtained at which the motor is as low-noise as possible.

NOTE

The switching frequency is reduced automatically as a function of the load. See

Temperature-Dependent Switching Frequency under Special Conditions .

When LC-filter connected is selected in parameter 412, the minimum switching frequency is 4.5 kHz.

VLT® 2800 Series

412 Variable switching frequency

(Var carrier freq.)

Value:

Without LC-filter (WITHOUT LC-FILTER) [2]

LC-filter connected (LC-filter connected) [3]

Function:

The parameter must be set to LC-filter connected if an LC-filter is connected between the adjustable frequency drive and the motor.

Description of choice:

The LC-filter connected [3] must be used if an LC-filter is connected between the adjustable frequency drive and the motor, as otherwise the adjustable frequency drive cannot protect the LC-filter.

NOTE

When the LC filter is selected the switching frequency is changed to 4.5 kHz.

413 Overmodulation function

(OVERMODULATION)

Value:

Off (off) [0]

On (on) [1]

Function:

This parameter allows connection of the overmodulation function for the output voltage.

Description of choice:

Off [0] means that there is no overmodulation of the output voltage, which means that torque ripple on the motor shaft is avoided. This can be a good feature, e.g. on grinding machines. On [1] means that an output voltage can be obtained which is greater than the mains voltage (up to 5 %).

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VLT® 2800 Series

414

Minimum feedback, FB

MIN

(Min. feedback)

Value:

-100,000.000 - par. 415 FB

MAX

0.000

Function:

Parameter 414 Minimum feedback, FB Maximum feedback, FB

are used to scale the dis-

MAX

and 415

MIN

play text to make it show the feedback signal in a process unit proportionally to the signal on the input.

Description of choice:

Set the value to be shown on the display as the minimum feedback signal value on the selected feedback input (parameters 308/314 Analog inputs).

415

Maximum feedback, FB

MAX

(Max. feedback)

Value:

- 100,000.000

MIN

1500.000

Function:

See description of parameter 414 Minimum feedback,

MIN

Description of choice:

Set the value to be shown on the display when the maximum feedback has been obtained on the selected feedback input (parameter 308/314 Analog inputs).

416 Process units

(REF/FEEDB. UNIT)

Value:

No unit (No unit) [0]

% (%) [1]

ppm (ppm) [2]

rpm (rpm) [3]

bar (bar) [4]

Cycles/min. (CYCLE/MIN.) [5]

Pulses/sec. (PULSE/SEC.) [6]

Units/sec. (UNITS/SEC.) [7]

Units/min. (UNITS/MIN.) [8]

Units/h (Units/h) [9]

°C (°C) [10]

Pa (pa) [11]

l/s (l/s) [12]

/s (m3/s) [13]

l/min. (l/min.) [14]

/min. (m3/min) [15]

l/h (l/h) [16]

/h (m3/h) [17]

kg/sec. (kg/sec.) [18]

kg/min. (kg/min.) [19]

kg/hour (kg/h) [20]

tons/min. (T/min) [21]

tons/hour (T/h) [22]

Meters (m) [23]

Nm (nm) [24]

m/sec. (m/sec.) [25]

m/min. (m/min) [26]

°F (°F) [27]

In wg (in wg) [28]

gal/sec. (gal/sec.) [29]

/sec. (ft3/sec.) [30]

gal/min. (gal/min) [31]

/min. (ft3/min) [32]

gal/h (gal/h) [33]

/h (ft3/h) [34]

lb/sec. (lb/sec.) [35]

lb/min. (lb/min.) [36]

lb/hour (lb/h) [37]

lb ft (lb ft) [38]

ft/s (ft/s) [39]

ft/min. (ft/min.) [40]

psi (psi) [41]

Function:

Select which of the different units are to be shown on the display. The unit is read out if an LCP control unit can be connected, and if Reference [unit] [2] or Feed- back [unit] [3] has been selected in one of parameters 009-012 Display readout, and in display mode. The unit is used in Closed-loop also as a unit for minimum/ maximum reference and minimum/maximum feedback.

Programming

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VLT® 2800 Series

Description of choice:

Select the required unit for the reference/feedback signal.

NOTE

Parameters 417-421 are only used, if in parameter 100 Configuration the selection made is Speed regulation, closed loop [1].

417 Speed PID proportional gain

(SPEED PROP GAIN)

Value:

0.000 (OFF) - 1.000

Function:

Proportional gain indicates how many times the fault (deviation between the feedback signal and the setpoint) is to be amplified.

Description of choice:

Quick regulation is obtained at high amplification, but if the amplification is too high, the process may become unstable in the case of overshooting.

418 Speed PID integral time

(SPEED int. time)

Value:

20.00 - 999.99 ms (1000 = OFF)

Function:

The integral time determines how long the PID regulator takes to correct the error. The greater the error, the quicker the integrator frequency contribution will increase. The integral time is the time the integrator needs to achieve the same change as the proportional amplification.

Description of choice:

Quick regulation is obtained through a short integral time. However, if this time is too short, it can make the process unstable. If the integral time is long, major deviations from the required reference may occur, since the process regulator will take long to regulate if an error has occurred.

0.010

100 ms

419 Speed PID differential time

(SPEED diff. time)

Value:

0.00 (OFF) - 200.00 ms

Function:

The differentiator does not react to a constant error. It only makes a contribution when the error changes. The quicker the error changes, the stronger the gain from the differentiator will be. The contribution is proportional to the speed at which errors change.

Description of choice:

Quick control is obtained by a long differential time. However, if this time is too long, it can make the process unstable. When the differential time is 0 ms, the Dfunction is not active.

420 Speed PID D- gain limit

(SPEED D-GAIN LIM)

Value:

5.0 - 50.0

Function:

It is possible to set a limit for the gain provided by the differentiator. Since the D-gain increases at higher frequencies, limiting the gain may be useful. This enables obtaining a pure D-gain at low frequencies and a constant D-gain at higher frequencies.

Description of choice:

Select the required gain limit.

421 Speed PID lowpass filter time

(speed filt. time)

Value:

20 - 500 ms

Function:

Noise in the feedback signal is dampened by a first order lowpass filter to reduce the noise's impact on the regulation. This might be an advantage, e.g. if there is a great amount of noise on the signal. See drawing.

20.00 ms

5.0

100 ms

= factory setting, () = display text, [] = value for use in communication via serial communication port

72 MG.27.A2.22 - VLT® is a registered Danfoss trademark

Description of choice:

If a time constant (t) of 100 ms is programmed, the cutoff frequency for the lowpass filter will be 1/0.1 = 10 RAD/sec., corresponding to (10 / 2 x ) = 1.6 Hz. The PID regulator will then only regulate a feedback signal that varies with a frequency of less than 1.6 Hz. If the feedback signal varies by a higher frequency than 1.6 Hz, it will be dampened by the lowpass filter.

VLT® 2800 Series

Description of choice:

Set the output voltage (U1) that is to match the first output frequency (F1), parameter 424 F1 frequency.

424 F1 frequency

(F1 frequency)

Value:

0.0 - par. 426 F2 frequency

Function:

See parameter 423 U1 voltage .

Description of choice:

Set the output frequency (F1) that is to match the first output voltage (U1), parameter 423 U1 voltage .

Par. 104 Motor fre-

quency

Programming

425 U2 voltage

423 U1 voltage

(U1 voltage)

Value:

0.0 - 999.0 V

Function:

Parameters 423-428 are used when in parameter 101Torque characteristic a selection has been made of Special motor characteristic [8]. It is possible to determine a U/f characteristic on the basis of four definable voltages and three frequencies. The voltage at 0 Hz is set in parameter 133 Start voltage.

= factory setting, () = display text, [] = value for use in communication via serial communication port

MG.27.A2.22 - VLT® is a registered Danfoss trademark 73

par. 103

Value:

0.0 - 999.0 V

Function:

See parameter 423 U1 voltage.

Description of choice:

Set the output voltage (U2) that is to match the second output frequency (F2), parameter 426 F2 frequency.

426 F2 frequency

Value:

Par. 424 F1 frequency - par. 428 F3 frequency

(U2 voltage)

par. 103

(F2 frequency)

Par. 104 Mo-

tor frequency

VLT® 2800 Series

Function:

See parameter 423 U1 voltage.

Description of choice:

Set the output frequency (F2) that is to match the second output voltage (U2), parameter 425 U2 voltage.

427 U3 voltage

(U3 voltage)

Value:

0.0-999.0 V

Function:

See parameter 423 U1 voltage.

Description of choice:

Set the output voltage (U3) that is to match the third output frequency (F3), parameter 428 F3 frequency .

428 F3 frequency

(F3 frequency)

Value:

Par. 426 F2 frequency - 1000 Hz

Function:

See parameter 423 U1 voltage.

Description of choice:

Set the output frequency (F3) that is to match the third output voltage (U3), parameter 427 U3 voltage .

NOTE

Parameters 437-444 are only used if in parameter 100 Configuration a selection has been made of Process regulation, closed loop. [3].

437 Process PID normal/inverse control

(proc no/inv ctrl)

Value:

Normal (normal) [0]

Inverse (inverse) [1]

par. 103

Par. 104 Motor

frequency

Function:

It is possible to choose whether the process regulator is to increase/reduce the output frequency if there is a deviation between the reference/setpoint and the actual process mode.

Description of choice:

If the adjustable frequency drive is to reduce the output frequency in case the feedback signal increases, select Normal [0].If the adjustable frequency drive is to increase the output frequency in case the feedback signal increases, select Inverse [1].

438 Proces PID anti windup

(proc anti windup)

Value:

Not active (DISABLE) [0]

Active (ENABLE) [1]

Function:

It is possible to select whether the process regulator is to continue regulating on a deviation even if it is not possible to increase/reduce the output frequency.

Description of choice:

The factory setting is Enable [1], which means that the integration link is initialised in relation to the actual output frequency if either the current limit, the voltage limit or the max./min. frequency has been reached. The process regulator will not engage again until either the error is zero or its sign has changed. Select Disable [0] if the integrator is to continue integrating on the deviation, even if it is not possible to remove the fault by such control.

NOTE

If Disable [0] is selected, it will mean that when the deviation changes its sign, the integrator will first have to integrate down from the level obtained as a result of the former error, before any change in output frequency occurs.

= factory setting, () = display text, [] = value for use in communication via serial communication port

74 MG.27.A2.22 - VLT® is a registered Danfoss trademark

VLT® 2800 Series

439 Process PID start frequency

(PROC START VALUE)

Value:

- f

MAX

(pa-

Par. 201 Output frequency, low

limit, f

MIN

rameter 201/202)

Function:

When the start signal comes, the adjustable frequency drive will react in the form of Open loop and will not change to Closed loop until the programmed start frequency is reached. This makes it possible to set a frequency that corresponds to the speed at which the process normally runs, which will enable the required process conditions to be reached sooner.

Description of choice:

Set the required start frequency.

NOTE

If the adjustable frequency drive is running a the current limit before the required start frequency is obtained, the process regulator will not be activated. For the regulator to be activated anyway, the start frequency must be lower to the required output frequency. This can be done during operation.

440 Proces PID proportioanl gain

(PROC. PROP. GAIN)

Value:

0.0 - 10.00

0.01

Function:

The proportional gain indicates the number of times the deviation between the setpoint and the feedback signal is to be applied.

441 Process PID integration time

(PROC. INTEGR. T.)

Value:

0.01 - 9999.99 (OFF)

OFF

Function:

The integrator provides an increasing gain at a constant error between the reference/setpoint and the feedback signal. The greater the error, the quicker the integrator frequency contribution will increase.The integral time is the time needed by the integrator to make the same change as the proportional gain.

Description of choice:

Quick regulation is obtained at a short integral time. However, this time may become too short, which can make the process unstable due to overswing. If the integral time is long, major deviations from the required setpoint may occur, since the process regulator will take a long time to regulate in relation to a given error.

442 Process PID differentiation time

(PROC. DIFF. time)

Value:

0.00 (OFF) - 10.00 sec.

0.00 sec.

Function:

The differentiator does not react to a constant error. It only makes a gain when an error changes. The quicker the deviation changes, the stronger the gain from the differentiator. The gain is proportional to the speed at which the deviation changes.

Description of choice:

Quick regulation is obtained with a long differentiation time. However, this time may become too long, which can make the process unstable due to overswing.

Programming

Description of choice:

Quick regulation is obtained by a high gain, but if the gain is too high, the process may become unstable due to overshoot.

= factory setting, () = display text, [] = value for use in communication via serial communication port

MG.27.A2.22 - VLT® is a registered Danfoss trademark 75

443 Process PID diff. gain limit

(PROC. DIFF.GAIN)

Value:

5.0 - 50.0

5.0

VLT® 2800 Series

Function:

It is possible to set a limit for the differentiator gain. The differentiator gain will increase if there are fast changes, which is why it can be beneficial to limit this gain. Thereby a pure differentiator gain is obtained at slow changes and a constant differentiator gain where quick changes to the deviation occur.

Description of choice:

Select a differentiator gain limit as required.

444 Process PID lowpass filter time

(proc filter time)

Value:

0.02 - 10.00

0.02

Function:

Noise in the feedback signal is dampened by a first order lowpass filter to reduce the noise's impact on the process regulation. This can be an advantage e.g. if there is a lot of noise on the signal.

Description of choice:

Select the required time constant (t). If a time constant (t) of 0.1 s is programmed, the cut-off frequency for the lowpass filter will be 1/0.1 = 10 RAD/sec., corresponding to (10 / 2 x ) = 1.6 Hz. The process regulator will thus only regulate a feedback signal that varies by a frequency lower than 1.6 Hz. If the feedback signal varies by a higher frequency than 1.6 Hz, it will be dampened by the lowpass filter.

Function:

This function makes it possible to 'catch' a rotating motor shaft, which is no longer controlled by the adjustable frequency drive, e.g. because of a mains dropout. The function is activated each time a start command is enabled. For the adjustable frequency drive to be able to 'catch' the rotating motor shaft, the motor speed must be lower than the frequency that corresponds to the frequency in parameter 202 Output

frequency, high limit, f

MAX

Description of choice:

Select Disable [0] if this function is not required.

Select OK - same direction [1] if the motor shaft is only able to rotate in the same direction when cutting in. OK

- same direction [1] should be selected if in parameter 200 Output frequency range a selection has been of Clockwise only .

Select OK - both directions [2] if the motor is able to rotate in both directions when cutting in.

Select DC brake and start [3] if the adjustable frequency drive is to be able to brake the motor using the DC brake first, followed by start. It is assumed that parameters 126-127/132 DC brake are enabled. In the case of higher 'Windmilling' (rotating motor) effects, the adjustable frequency drive is not able to 'catch' a rotating motor without selecting DC brake and start .

Limitations:

Too low inertia will lead to load acceleration,

which can be dangerous or prevent correct catching of a rotating motor. Use the DC brake instead.

If the load is driven, e.g. by 'Windmilling' (ro-

445 Flying start

(flyingstart)

Value:

Off (DISABLE) [0]

tating motor) effects, the unit may cut out because of overvoltage.

Flying start does not work at lower values

than 250 rpm. OK - same direction (OK-same direction) [1]

OK - both directions (OK-both directions) [2]

DC brake and start (DC-BRAKE BEF. START) [3]

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76 MG.27.A2.22 - VLT® is a registered Danfoss trademark

451 Speed PID feedforward factor

(feedforward fact)

Value:

0 - 500 %

100 %

VLT® 2800 Series

Function:

This parameter is only active if in parameter 100 Configuration the selection made is Speed regulation, closed loop. The FF function sends a larger or smaller

part of the reference signal outside the PID controller in such a way that the PID controller only has an influence on part of the control signal. Any change to the set point will thus have a direct effect on the motor speed. The FF factor provides high dynamism when changing the set point and less overswing.

Description of choice:

The required % value can be selected in the interval f

- f

MIN

. Values over 100 % are used if the set point

MAX

variations are only small.

452 Controller range

(pid contr. range)

Value:

0 - 200 %

10 %

Function:

This parameter is only active if Speed regulation, closed-loop is made in parameter 100 Configuration.

The controller range (bandwidth) limits the output from the PID controller as a % of motor frequency f

M,N

Description of choice:

The required % value can be selected for motor frequency f

. If the controller range is reduced, the

M,N

speed variations will be less during initial tuning.

Description of choice:

Select Enable [1] to enable the readout in the display if warning 33 Out of frequency range occurs. Select Disable [0] to disable the readout in the display if warning 33 Out of frequency range occurs.

456 Brake Voltage Reduce

(BRAKE VOL REDUCE)

Value:

0 - 25 V if 200 V device

0 - 50 V if 400 V device

Function:

The user sets the voltage by which the level for resistor braking is reduced. It is only active when resistor in parameter 400 is selected.

Description of choice:

The greater the reduction value, the faster the reaction to a generator overload. Should only be used if there are problems with overvoltage in the intermediate circuit.

457 Phase loss function

(PHASE LOSS FUNCT)

Value:

Trip (TRIP) [0]

Autoderate & warning (AUTODERATE & WARNING) [1]

Warning (WARNING) [2]

Programming

455 Frequency range monitor

(MON. FREQ. RANGE)

Function:

Select the function which is to be activated if the mains imbalance becomes too high or if a phase is missing.

Value:

Disable [0]

Enable [1]

Description of choice:

At Trip [0] the adjustable frequency drive will stop the motor within a few seconds (depending on drive size).

Function:

This parameter is used if warning 33 Out of frequency range must be turned off in the display in process con-

trol closed-loop. This parameter does not affect the extended status word.

If Autoderate & warning [1] is selected, the drive will export a warning and reduce the output current to 50 % of I

to maintain operation.

VLT,N

At Warning [2] only a warning will be exported when a mains failure occurs, but in severe cases, other extreme conditions might result in a trip.

= factory setting, () = display text, [] = value for use in communication via serial communication port

MG.27.A2.22 - VLT® is a registered Danfoss trademark 77

NOTE

If Warning has been selected, the life expectancy of the drive will be reduced when the mains failure persists.

461 Feedback conversion

(FEEDBACK CONV.)

Value:

Linear (LINEAR) [0]

Square root (SQUARE ROOT) [1]

Function:

In this parameter, a function is selected which converts a connected feedback signal from the process to a feedback value that equals the square root of the connected signal. For example, this is used when flow (volume) regulation is required on the basis of pressure as feedback signal (flow = constant x

pressure

the reference in such a way that there is a linear connection between the reference and the flow required.

). This conversion makes it possible to set

VLT® 2800 Series

Description of choice:

If Linear [0] is selected, the feedback signal and the feedback value will be proportional. If Square root [1] is selected, the adjustable frequency drive translates the feedback signal to a squared feedback value.

78 MG.27.A2.22 - VLT® is a registered Danfoss trademark

VLT® 2800 Series

Enhanced Sleep Mode

The enhanced sleep mode has been developed to work under all conditions and to overcome problems when using pumps with flat pump curves, or when suction pressure varies. Enhanced sleep mode provides excellent control for shutting down the pump at low-flow, thus saving energy.

If operating with constant pressure control in the SYSTEM, for instance a drop in the suction pressure will lead to an increase in frequency to maintain pressure. Consequently there is a situation, where the frequency will vary independent of the flow. This can lead to inappropriate activation of sleep mode or wake-up of the adjustable frequency drive.

Flat pump curves leads to a situation where there will be little or no change in frequency in response to flow variation. Consequently, the adjustable frequency drive might not reach the sleep frequency when setting it at a low value.

Enhanced sleep mode is based on power/frequency monitoring and works in closed loop only. Stop due to the enhanced sleep mode function is initiated under the following conditions:

• Power consumption is below the no/low flow power curve and stays there for a certain time (parameter 462 Enhanced sleep mode timer)

• The pressure feedback is above the reference when running at minimum speed and stays there for a certain time (parameter 462 Enhanced sleep mode timer).

If the feedback pressure falls below the wakeup pressure (Parameter 464 Wakeup pressure), the adjustable frequency drive restarts the motor.

Dry Run Detection

For most pumps, especially submersible bore-hole pumps, it must be assured that the pump is stopped in case of dry run. This is assured by the Dry run detection feature.

How Does It Work?

Dry run detection is based on power/frequency monitoring and works in both closed and open loop.

Stop (trip) due to dry run is initiated under following conditions: Closed loop:

• The adjustable frequency drive is running at maximum frequency (parameter 202 Output frequency high limit, f

MAX

) and

• Feedback is below minimum reference (parameter 204 Minimum reference, Ref,

MIN

) and

• Power consumption is below the no/low flow power curve for a certain time (parameter 470 Dry run time out)

Open loop:

• Whenever the power consumption is below the no/low flow power curve for a certain time (parameter 470 Dry run time out) the adjustable frequency drive will trip.

The adjustable frequency drive can be set up for either manual or automatic restart after stop (parameters 405 Reset function and 406 Automatic restart time).

• Enhanced Sleep Mode and Dry Run Detection can be enabled and disabled independently. This is done in parameter 462 Enhanced sleep mode timer and parameter 470 Dry run timeout.

Centrifugal pumps with radial impellers show a clear one-to-one relation between power consumption and flow, which is utilized to detect a no or low flow situation. It is only necessary to enter two sets of values for power and frequency (min and max) at no or low flow. The adjustable frequency drive then automatically calculates all data in-between those two sets of values and generates the no/low flow power curve. If the power consumption falls below the power curve, the adjustable frequency drive enters Sleep-mode or trips due to dry run, depending on the configuration.

Programming

MG.27.A2.22 - VLT® is a registered Danfoss trademark 79

• Dry run protection. Shuts down at no or lowflow and protects the motor and pump from overheating.

• Improved energy savings with enhanced sleep mode.

• Minimized risk of bacterial growth in drinking water because of insufficient motor cooling.

• Easy commissioning.

Only centrifugal pumps with radial impellers show a clear one-to-one relationship between flow and power. Consequently, proper functionality of the Enhanced Sleep Mode and Dry Run Detection is only given for this type of pump.

462 Enhanced Sleep Mode Timer

(ESL timer)

Value:

Value 0 – 9999 sec.

Function:

The timer prevents cycling between Sleep mode and normal operation. If for instance the power consumption falls below the no/low flow power curve the adjustable frequency drive will change mode when the timer expires.

0 = OFF

VLT® 2800 Series

463 Boost setpoint

(BOOST SETPOINT)

Value:

1 - 200 %

Function:

This function can only be used if Closed loop has been selected in parameter 100. In systems with constant pressure regulation, it is advantageous to increase the pressure in the system before the adjustable frequency drive stops the motor. This extends the time during which the adjustable frequency drive stops the motor and helps to avoid frequent starting and stopping of the motor, e.g. in the case of leaks in the water supply system.

There is a fixed boost time-out on 30 sec. in case the boost setpoint cannot be reached.

Description of choice:

Set the required Boost setpoint as a percentage of the resulting reference under normal operation. 100% corresponds to the reference without boost (supplement).

100 % of setpoint

Description of choice:

In case of cycling, set the timer to an appropriate value that limits the number of cycles. The value 0 disables Enhanced sleep mode. Note: In parameter 463 Boost set point it is possible to set up the adjustable frequency drive to provide a pressure boost before the pump is stopped.

= factory setting, () = display text, [] = value for use in communication via serial communication port

80 MG.27.A2.22 - VLT® is a registered Danfoss trademark

VLT® 2800 Series

464 Wakeup Pressure

(Wakeup Pressure)

Value:

Par. 204 Ref

– par. 215 - 218 Setpoint

MIN

Function:

When in Sleep mode the adjustable frequency drive will wake up when the pressure is below the Wakeup pressure for the time set in parameter 462 Enhanced sleep mode timer.

Description of choice:

Set an appropriate value for the system. The unit is set in parameter 416.

465 Minimum pump frequency

(Pump min. freq.)

Value:

Value par. 201 f

– par. 202 f

MIN

MAX

(Hz)

Function:

This parameter is linked to parameter 467 Minimum Power and is used for no/low-flow power curve.

467 Minimum Pump Power

(Min. pump power)

Value:

0–500.000 W

Function:

The associated power consumption at the frequency entered in parameter 465 Minimum pump frequency.

Description of choice:

Enter the no/low-flow power reading at minimum pump frequency entered in parameter 465.

Depending on pump size or curve, select W or kW in par. 009 index [32] and [8] for fine tuning.

468 Maximum Pump Power

(Max. pump power)

Value:

0–500.000 W

Function:

The associated power consumption at the frequency entered in parameter 466 Minimum pump frequency.

Programming

Description of choice:

Enter a value equal or close to the desired minimum frequency set in parameter 201 Output frequency low

limit, f

. Please note that the extension of the no/low-

MIN

flow power curve is limited by parameters 201 and 202, and not by parameters 465 and 466.

466 Maximum Pump Frequency

(Pump max. freq)

Value:

Value par. 201 f

- par. 202 f

MIN

MAX

(Hz)

Function:

This parameter is linked to parameter 468 Maximum pump power and is used for the no/low-flow power

curve.

Description of choice:

Enter a value equal or close to the desired maximum frequency set in parameter 202 Output frequency high

limit, f

MAX

Description of choice:

Enter the no/low-flow power reading at maximum pump frequency entered in parameter 466.

Depending on pump size or curve, select W or kW in par. 009 index [32] and [8] for fine tuning.

469 No Flow Power Compensation

(NF power comp)

Value:

0.01 - 2

1.2

Function:

This function is used for an off-set of the no/low-flow power curve, which can be used as a safety factor or for fine tuning the system.

Description of choice:

Description The factor is multiplied to the power values. E.g., 1.2 will increase the power value with 1.2 over the whole frequency range.

= factory setting, () = display text, [] = value for use in communication via serial communication port

MG.27.A2.22 - VLT® is a registered Danfoss trademark 81

VLT® 2800 Series

470 Dry Run Time Out

(DRY RUN TIME OUT)

Value:

5-30 sec.

Function:

If the power is below the no/low flow power curve, running at max speed for the time set in this parameter, the adjustable frequency drive will trip on Alarm 75: Dry run. In open loop operation the maximum speed does not necessarily need to be reached before tripping.

Description of choice:

Set the value to obtain the desired delay before tripping. Manual or automatic restart can be programmed in parameter 405 Reset function and 406 automatic re- start time. The value 30 disables Dry run detection.

471 Dry Run Interlock Timer

(Dry run int time)

Value:

0.5-60 min.

Function:

This timer determines when a trip due to dry run can be automatically reset. When the timer expires, the automatic reset of the trip can automatically restart the adjustable frequency drive again.

31 = OFF

30 min.

484 Initial ramp

(INITIAL RAMP)

Value:

OFF/000.1s - 360.0 s

Function:

Allows the motor/equipment to be brought up to minimum speed (frequency) at a rate different than the normal ramp-up rate (param. 207).

Description of choice:

For example, vertical pumps and other equipment often have a requirement to not operate below a minimum speed any longer than necessary. Damage and excessive wear can occur when operating below minimum speed (frequency) for too long. The initial ramp is used to quickly accelerate the motor/equipment to minimum speed at which point, the normal ramp-up rate (parameter 207) is made active. The range of adjustment of the initial ramp is from 000.1 second to

360.0 seconds; it can be adjusted in 0.1 second increments. OFF is displayed in this parameter if it is set to

000.0, and the initial ramp is not active and the normal ramp-up is active.

OFF

Description of choice:

Parameter 406 Automatic restart time still determines how frequent an attempt to reset a trip will be performed. If for instance parameter 406 Automatic restart

time is set to 10 sec. and parameter 405 Reset function is set to Automatic Reset x10 the adjustable fre-

quency drive will attempt to reset the trip 10 times within 100 seconds. If parameter 471 is set to 30 min. the adjustable frequency drive will consequently not be able to perform automatic reset of dry run trip and will need a manual reset.

= factory setting, () = display text, [] = value for use in communication via serial communication port

82 MG.27.A2.22 - VLT® is a registered Danfoss trademark

Fill Mode

Fill Mode eliminates the occurrence of water hammer associated with the rapid exhausting of air from piping systems (such as Irrigation systems).

The adjustable frequency drive, set for Closed Loop operation uses an adjustable Fill Rate, a "Filled Pressure" setpoint, an operating pressure setpoint, and a pressure feedback.

Fill Mode is available when:

•

The VLT 2800 drive is in Closed Loop mode (parameter 100).

•

Parameter 485 is not 0

•

Parameter 437 is set to NORMAL

After a start command, Fill Mode operation begins when the adjustable frequency drive reaches minimum frequency - set in parameter 201.

The "Filled" Setpoint - parameter 486- is actually a setpoint limit. When minimum speed is reached, the pressure feedback is looked at, and the adjustable frequency drive begins to ramp to the "Filled" pressure setpoint at the rate established by Fill Rate parameter

485.

The Fill Rate - parameter 485- is dimensioned in Units/ Second. The Units will be the units selected in parameter 416.

When the pressure feedback equals the "Filled" Setpoint, the control transitions to the operating setpoint (Setpoint 1-4, param. 215-218) and continues operation in standard (normal) "closed loop" mode.

The value to use for the "Filled" Setpoint parameter 486, can be determined by:

1. Use the DISPLAY MODE key on the LCP to display FEEDBACK 1. IMPORTANT! Be sure that you have selected the UNITS in parameter 416 before this step.

Operate the VLT 2800 in HAND mode and slowly advance the speed to fill the pipe while being careful not to create a water hammer.

3. An observer at the end of the pipe must be able to report when the pipe is filled.

4. At that instant, stop the motor, and observe the value of pressure feedback (have the LCP display set to observe the feedback before starting).

VLT® 2800 Series

485 Fill Rate

(FILL RATE)

Value:

OFF/000000.001 - 999999.999 (units/s) -

Function:

Establishes the rate at which the pipe is filled.

Description of choice:

The dimension of this parameter is units/second. The units will be the value selected in parameter 416. For example, the units could be bar, MPa, PSI, etc. If bar is the selected unit in parameter 416, then the number set in this parameter (485) would be dimensioned as bar/second. Changes to this parameter can be made in steps of .001 units.

486 Filled Setpoint

(FILLED SETPOINT)

Value:

Param. 414 - Param. 205 -

Param. 414

Function:

The value set in this parameter corresponds to the pressure that exists at the pressure sensor when the pipe is filled.

OFF

Programming

5. The value of feedback in step 4) is the value to use in parameter 486 - "Filled" Setpoint.

The value to set in parameter 485- Fill Rate can be supplied by the system engineer from proper calculation or from experience, or it can be determined experimentally by performing numerous fill mode se-

Description of choice:

The units of this parameter correspond to the units selected in Parameter 416. The minimum value of this parameter is Fb for this parameter is Ref

(param. 414). The maximum value

min

(param. 205). The setpoint

max

can be changed in .01 steps.

quences and either increasing or decreasing the value of this parameter to obtain the fastest fill without causing a water hammer.

The Fill Mode is also beneficial when bringing the motor to a stop as it prevents sudden changes in pressure and flow which could also cause a water hammer.

= factory setting, () = display text, [] = value for use in communication via serial communication port

MG.27.A2.22 - VLT® is a registered Danfoss trademark 83

VLT® 2800 Series

Serial communication

500 Address

(BUS ADDRESS)

Value:

Parameter 500 Protocol = FC protolkol [0] 0 - 247

Parameter 500 Protocol = Metasys N2 [1] 1 - 255

Parameter 500 Protocol = MODBUS RTU [3] 1 - 247

Function:

This parameter allows the allocation of an address to each variable frequency drive in a serial communication network.

Description of choice:

The individual variable frequency drive must be allocated a unique address. If the number of units connected (variable frequency drives + master) is higher than 31, a repeater must be used. Parameter 500 Address cannot be selected via the serial communication, but must be preset via the control unit.

501 Baudrate

(BAUDRATE)

Value:

300 Baud (300 BAUD) [0]

600 Baud (600 BAUD) [1]

1200 Baud (1200 BAUD) [2]

2400 Baud (2400 BAUD) [3]

4800 Baud (4800 BAUD) [4]

9600 Baud (9600 BAUD) [5]

Function:

This parameter is for programming the speed at which data is transmitted via the serial port. Baud rate is defined as the number of bits transmitted per second.

Description of choice:

The variable frequency drive's transmission speed must be set at a value corresponding to the transmission speed of the master.

Parameter 501 Baudrate cannot be selected via the serial port, but must be preset via the operating unit.

502 Coasting Stop

(COASTING SELECT)

Value:

Digital input (DIGITAL INPUT) [0]

Serial port (SERIAL PORT) [1]

Logic and (LOGIC AND) [2]

Logic or (LOGIC OR) [3]

Function:

Parameters 502-508 allow a choice between controlling the adjustable frequency drive via the digital inputs and/or via the serial port. If Serial port [1] is selected, the relevant command can only be activated if a command is given via the serial port. In the case of Logic and [2] the function must also be activated via a digital input.

Description of choice:

The table below shows when the motor is running and when it is coasting, when each of the following is selected: Digital input [0], Serial port [1], Logic and [2] or Logic or [3].

NOTE

Note that Coasting stop and Bit 03 in the control word are active at logic '0'.

Digital input [0]

Dig. input

0 0 Coasting 0 1 Coasting 1 0 Motor running 1 1 Motor running

Serial port [1]

Dig. input

0 0 Coasting 0 1 Motor running 1 0 Coasting 1 1 Motor running

Logic and [2]

Dig. input

0 0 Coasting 0 1 Motor running 1 0 Motor running 1 1 Motor running

Ser. port Function

= factory setting, () = display text, [] = value for use in communication via serial communication port

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VLT® 2800 Series

Logic or [3]

Dig. input

0 0 Coasting 0 1 Coasting 1 0 Coasting 1 1 Motor running

Ser. port Function

503 Quick-stop

(Q STOP SELECT)

Value:

Digital input (DIGITAL INPUT) [0]

Serial port (SERIAL PORT) [1]

Logic and (LOGIC AND) [2]

Logic or (LOGIC OR) [3]

Function:

See function description for parameter 502 Coasting stop.

Description of choice:

The table below shows when the motor is running and when it is in Quick stop mode, when each of the following is selected: Digital input [0], Serial port [1], Logic and [2] or Logic or [3].

NOTE

Note that Quick stop inverse and Bit 04 in the control word are active at logic '0'.

Digital input [0]

Dig. input

Serial port Function 0 0 Quick stop 0 1 Quick stop 1 0 Motor running 1 1 Motor running

Serial port [1]

Dig. input

Serial port Function 0 0 Quick stop 0 1 Motor running 1 0 Quick stop 1 1 Motor running

Logic and [2]

Dig. input

Serial port Function 0 0 Quick stop 0 1 Motor running 1 0 Motor running 1 1 Motor running

Logic or [3]

Dig. input

Serial port Function 0 0 Quick stop 0 1 Quick stop 1 0 Quick stop 1 1 Motor running

504 DC brake

(DC BRAKE SELECT)

Value:

Digital input (DIGITAL INPUT) [0]

Serial port (SERIAL PORT) [1]

Logic and (LOGIC AND) [2]

Logic or (LOGIC OR) [3]

Function:

See function description for parameter 502 Coasting stop.

Description of choice:

The table below shows when the motor is running and the DC braking when each of the following is selected

Digital input [0], Serial port [1], Logic and [2] or Logic or [3].

NOTE

Note that DC braking inverse and Bit 02 in the control word are active at logic '0'.

Digital input [0]

Dig. input

Ser. port Function 0 0 DC braking 0 1 DC braking 1 0 Motor running 1 1 Motor running

Serial port [1]

Dig. input

Ser. port Function 0 0 DC braking 0 1 Motor running 1 0 DC braking 1 1 Motor running

Programming

= factory setting, () = display text, [] = value for use in communication via serial communication port

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VLT® 2800 Series

Logic and [2]

Dig. input

0 0 DC braking 0 1 Motor running 1 0 Motor running 1 1 Motor running

Logic or [3]

Dig. input

0 0 DC braking 0 1 DC braking 1 0 DC braking 1 1 Motor running

505 Start

(START SELECT)

Value:

Digital input (DIGITAL INPUT) [0]

Serial port (SERIAL PORT) [1]

Logic and (LOGIC AND) [2]

Logic or (LOGIC OR) [3]

Ser. port Function

Logic and [2]

Dig. input

0 0 Stop 0 1 Stop 1 0 Stop 1 1 Start

Logic or [3]

Dig. input

0 0 Stop 0 1 Start 1 0 Start 1 1 Start

506 Reverse

(REVERSE SELECT)

Value:

Digital input (DIGITAL INPUT) [0]

Serial port (SERIAL PORT) [1]

Logic and (LOGIC AND) [2]

Logic or (LOGIC OR) [3]

Ser. port Function

Function:

See function description for parameter 502 Coasting stop.

Description of choice:

The table below shows when the motor has stopped and when the variable frequency drive has a start command when each of the following is selected: Digital

input [0], Serial port [1], Logic and [2] or Logic or [3].

Digital input [0]

Dig. input

0 0 Stop 0 1 Stop 1 0 Start 1 1 Start

Serial port [1]

Dig. input

0 0 Stop 0 1 Start 1 0 Stop 1 1 Start

Ser. port Function

Function:

See function description for parameter 502 Coasting stop.

Description of choice:

The table below shows when the motor is running clockwise and counter-clockwise when each of the following is selected: Digital input [0], Serial port [1], Logic

and [2] or Logic or [3].

Digital input [0]

Dig. input

0 0 Clockwise 0 1 Clockwise 1 0 Counter-clockwise 1 1 Counter-clockwise

Serial port [1]

Dig. input

0 0 Clockwise 0 1 Counter-clockwise 1 0 Clockwise 1 1 Counter-clockwise

Ser. port Function

= factory setting, () = display text, [] = value for use in communication via serial communication port

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VLT® 2800 Series

Logic and [2]

Dig. input

0 0 Clockwise 0 1 Clockwise 1 0 Clockwise 1 1 Counter-clockwise

Logic or [3]

Dig. input

0 0 Clockwise 0 1 Counter-clockwise 1 0 Counter-clockwise 1 1 Counter-clockwise

507 Selection of Setup

(SETUP SELECT)

Value:

Digital input (DIGITAL INPUT) [0]

Serial communication (SERIAL PORT) [1]

Logic and (LOGIC AND) [2]

Logic or (LOGIC OR) [3]

Function:

See function description of parameter 502 Coasting stop.

Description of choice:

The table below shows which Setup (parameter 004

Active Setup) is selected for each of the following: Digital input [0], Serial communication [1], Logic and [2] or Logic or [3].

Digital input [0]

Setup msb

0 0 Setup 1 0 1 Setup 2 1 0 Setup 3 1 1 Setup 4

Serial communication [1]

Setup msb

0 0 Setup 1 0 1 Setup 2 1 0 Setup 3 1 1 Setup 4

Ser. port Function

Setup lsb Function

Logic and [2]

Bus Set-

msb

Logic or [3]

Bus Set-

msb

Bus Set-

lsb 0 0 0 0 1 0 0 0 0 1 0 0 1 0 0 0 1 0 0 0 1 1 1 1 1 1 0 0 1 1 1 1

Bus Set-

lsb 0 0 0 0 1 0 0 0 0 1 0 0 2 0 0 0 1 0 0 0 3 1 1 1 1 1 0 0 4 1 1 1

Dig. Set-

msb

0 0 1 1 0 1 0 1 0 1 1 1

1 0 1 2 1 1 0 1 1 1 1 2

0 0 1 1 0 1 0 3 0 1 1 3

1 0 1 2 1 1 0 3 1 1 1 4

Dig. Set-

msb

0 0 1 2 0 1 0 3 0 1 1 4

1 0 1 2 1 1 0 4 1 1 1 4

0 0 1 4 0 1 0 3 0 1 1 4

1 0 1 4 1 1 0 4 1 1 1 4

Dig. Set-

lsb

Dig. Set-

lsb

Setup no.

Programming

= factory setting, () = display text, [] = value for use in communication via serial communication port

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VLT® 2800 Series

508 Selection of preset ref.

(PRES.REF. SELECT)

Value:

Digital input (DIGITAL INPUT) [0]

Serial comunication (SERIAL PORT) [1]

Logic and (LOGIC AND) [2]

Logic or (LOGIC OR) [3]

Function:

See function description of parameter 502 Coasting stop.

Description of choice:

Preset references via serial communication are active when parameter 512 Telegram profile is set to FC pro- tocol [1].

509 Bus jog 1 (BUS JOG 1 FREQ.) 510 Bus jog 2 (BUS JOG 2 FREQ.)

Value:

0.0 - par. 202 Output frequency high limit

10,0 Hz

Function:

If parameter 512 Telegram Profile shows the selection Profidrive [0], two fixed speeds (Jog 1 or Jog 2) can be

selected via the serial port. The function is the same as in parameter 213 Jog fre- quency .

Description of choice:

Jog frequency f

MAX

can be selected between 0 Hz and

JOG

512 Telegram Profile

(Telegram Profile)

Value:

Profidrive (Profidrive) [0]

FC protocol (FC protocol) [1]

Function:

It is possible to choose between two different control word profiles.

Description of choice:

Select the desired control word profile. See Serial port for VLT 2800 for further details of control word profiles.

513 Bus time interval

(BUS TIMEOUT TIME)

Value:

1 - 99 sec.

1 sec.

Function:

In this parameter it is possible to preset the maximum time expected to elapse between receipt of two consecutive telegrams. If this time is exceeded, the serial communication is assumed to have stopped and the desired reaction is preset in parameter 514 Bus time interval function.

Description of choice:

Preset the required time.

514 Bus time interval function

(BUS TIMEOUT FUNC)

Value:

Off (off) [0]

Freeze output frequency (FREEZE OUTPUT) [1]

Stop (STOP) [2]

Jogging (JOGGING) [3]

Max. speed (MAX SPEED) [4]

Stop and trip (STOP AND TRIP) [5]

Function:

In this parameter you can select the required reaction for the variable frequency drive when the preset time in parameter 513 Bus time interval has been exceeded. If choices [1] to [5] are activated the output relay will be deactivated.

Description of choice:

The output frequency of the variable frequency drive can be frozen at the present value, stop the motor, be frozen at parameter 213 Jogging frequency, be frozen at parameter 202 Output frequency, high limit f

MAX

stop and activate a cut out.

= factory setting, () = display text, [] = value for use in communication via serial communication port

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VLT® 2800 Series

515-544 Data readout Value: Par. no. 515 Res. reference (REFERENCE %) % 516 Res. reference [Unit] (REFERENCE [UNIT]) Hz, rpm 517 Feedback [Unit] (FEEDBACK [UNIT]) Par. 416 518 Frequency (FREQUENCY) Hz 519 Frequency x scale (FREQUENCY X SCALE) Hz 520 Motor current (MOTOR CURRENT) Amp 521 Torque (TORQUE) % 522 Power[kW] (POWER (KW)) kW 523 Power[HP] (POWER (HP)) HP 524 Motor voltage (MOTOR VOLTAGE) V 525 DC-link voltage (DC LINK VOLTAGE) V 526 Thermal load motor (MOTOR THERMAL) % 527 Thermal load inverter (INV. THERMAL) % 528 Digital input (DIGITAL INPUT) Bin 529 Term.53, analogue input (ANALOG INPUT 53) V 531 Term.60, analogue input (ANALOG INPUT 60) mA 532 Pulse reference (PULSE REFERENCE) Hz 533 External ref. (EXT. REF.%) % 534 Status word, Hex (STATUS WORD) Hex 535 Bus feedback 1 (BUS FEEDBACK1) Hex 537 Inverter temperature (INVERTER TEMP.) °C 538 Alarm word (ALARM WORD) Hex 539 Control word (CONTROL WORD) Hex 540 Warning word (WARN. WORD) Hex 541 Extended status word (STATUS WORD) Hex 544 Pulse count (PULSE COUNT)

Description Display text Unit Update

interval

Programming

Function:

These parameters can be read out via the serial communication port and the LCP display. See also parameters 009-012 Display readout.

Resulting reference [unit], parameter 516:

Gives the resulting reference in Hz in Open loop (parameter 100). In a closed loop the reference unit is selected in parameter 416 Process units.

Feedback [unit], parameter 517:

NOTE

Parameters 515-541 can only be read out via an LCP control unit.

Gives the resulting feedback value with the unit/scaling selected in parameters 414, 415 and 416. See also dealing with feedback.

Frequency [Hz], parameter 518:

Description of choice:

Resulting reference %, parameter 515:

Gives the resulting reference as a percentage in the range from Minimum reference, Ref reference, Ref

. See also Dealing with references.

MAX

to Maximum

MIN

Gives the output frequency from the adjustable frequency drive.

Frequency x scaling [-], parameter 519:

corresponds to the present output frequency f

multi-

plied by the factor preset in parameter 008 Display scaling of output frequency .

= factory setting, () = display text, [] = value for use in communication via serial communication port

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VLT® 2800 Series

Motor current [A], parameter 520:

Gives the motor's phase current measured as an effective value.

Torque [Nm], parameter 521:

Gives the motor's present load in relation to the motor's rated torque.

Power [kW], parameter 522:

Gives the present power absorbed by the motor in kW.

Power [HP], parameter 523:

Gives the present power absorbed by the motor in HP.

Motor voltage, parameter 524:

Gives the voltage being supplied to the motor.

DC link voltage, parameter 525:

Gives the intermediate circuit voltage in the adjustable frequency drive.

Thermal load, motor [%], parameter 526:

Gives the calculated/estimated thermal load on the motor. 100% is the cut-out limit. See also parameter 128 Thermal motor protection.

Thermal load INV [%], parameter 527:

Gives the calculated/estimated thermal load on the adjustable frequency drive. 100% is the cut-out limit.

Digital input, parameter 528:

Gives the signal status from the 5 digital inputs (18, 19, 27, 29 and 33). Input 18 corresponds to the bit on the extreme left. '0' = no signal, '1' = connected signal.

Terminal 53 analogue input [V], parameter 529:

Gives the voltage value for the signal on terminal 53.

Terminal 60 analogue input [mA], parameter 531:

Gives the present value for the signal on terminal 60.

Allows writing of a bus feedback value which will then form part of the feedback handling.

Inverter temperature, parameter 537:

Gives the present inverter temperature on the adjustable frequency drive. The cut-out limit is 90-100 °C, with cut back in at 70 ± 5 °C.

Alarm word, parameter 538:

Gives in Hex code which alarm is on the adjustable frequency drive. See Warning word, extended status

word and alarm word.

Control word, parameter 539:

Gives the present control word on the adjustable frequency drive in Hex. See Serial communication for the

VLT 2800.

Warning word, parameter 540:

States whether there is a warning on the adjustable frequency drive in Hex. See Warning word, extended

status word and alarm word.

Extended status word, parameter 541:

States whether there is a warning on the adjustable frequency drive in Hex code. See Warning word, ex-

tended status word and alarm word.

Pulse count, parameter 544:

This parameter can be read out via the LCP display (009-012). When you run with counter stop, this parameter enables you, either with or without reset, to read the number of pulses registered by the device. The highest frequency is 67.6 kHz, while the lowest is 5 Hz. The counter is reset when counter stop is restarted.

Pulse reference [Hz], parameter 532:

Gives a pulse frequency in Hz connected to terminal

33.

560 N2 Override release time

(N2 OVER.REL.TIME)

Value:

External reference, parameter 533:

Gives the sum of external references as a percentage (sum of analogue/pulse/serial communication) in the range from Minimum reference, Ref reference, Ref

MAX

to Maximum

MIN

Status word, parameter 534:

Gives the present status word for the adjustable frequency drive in Hex. See Serial communication for the

1 - 65534 (OFF) sec.

OFF

Function:

In this parameter, the maximum time that is expected to pass between the reception of two consecutive N2 telegrams is set. If this time is exceeded, the serial communication is assumed to have stopped, and all points in the N2 point-map that are overridden will be released in the order below:

VLT 2800.

Bus feedback 1, parameter 535:

= factory setting, () = display text, [] = value for use in communication via serial communication port

90 MG.27.A2.22 - VLT® is a registered Danfoss trademark

VLT® 2800 Series

1. Release Analog Outputs from point address (NPA) 0 to 255.

2. Release Binary Outputs from point address (NPA) 0 to 255.

3. Release Internal Floating Points from point address (NPA) 0 to 255.

4. Release Internal Integer Points from point address (NPA) 0 to 255.

5. Release Internal Byte points from point address (NPA) 0 to 255.

Description of choice:

Set the required time.

561 Protocol

(PROTOCOL)

Value:

FC protocol (FC PROTOKOL) [0]

Metasys N2 (METASYS N2) [1]

Modbus RTU [2]

Function:

There is a choice of three different protocols.

Description of choice:

Select the required control word protocol.

For further information about using the Metasys N2 Protocol, see MG91CX; for Modbus RTU, see MG10SX.

570 Modbus parity and message framing

(M.BUS PAR./FRAME)

Value:

(EVEN/1 STOPBIT) [0]

(ODD/1 STOPBIT) [1]

(NO PARITY/1 STOPBIT) [2]

(NO PARITY/2 STOPBIT) [3]

Function:

This parameter sets up the drive’s Modbus RTU interface to communicate properly with the master control-

ler. The parity (EVEN, ODD, or NO PARITY) must be set to match the setting of the master controller.

Description of choice:

Select the parity that matches the setting for the Modbus master controller. Even or odd parity is sometimes used to allow a transmitted word to be checked for errors. Because Modbus RTU uses the more efficient CRC (Cyclic Redundancy Check) method of checking for errors, parity checking is seldom used in Modbus RTU networks.

571 Modbus communications timeout

(M.BUS COM.TIME.)

Value:

10 ms - 2000 ms

Function:

This parameter determines the maximum amount of time that the drive’s Modbus RTU will wait between characters that are sent by the master controller. When this amount of time expires, the drive’s Modbus RTU interface will assume that it has received the entire message.

Description of choice:

Generally, the value of 100 ms is sufficient for Modbus RTU networks, although some Modbus RTU networks may operate on a timeout value as short as 35 ms. If this value is set too short, the drive’s Modbus RTU interface may miss a part of the message. Since the CRC check will not be valid, the drive will ignore the message. The resulting retransmissions of messages will slow communications on the network. If this value is set too long, the drive will wait longer than necessary to determine that the message is completed. This will delay the drive’s response to the message and possibly cause the master controller to time out. The resulting retransmissions of messages will slow communications on the network.

580-582 Defined parameters

(defined pnu's)

Value:

Read only

100 ms

Programming

= factory setting, () = display text, [] = value for use in communication via serial communication port

MG.27.A2.22 - VLT® is a registered Danfoss trademark 91

Function:

The three parameters hold a list of all the parameters that are defined in the VLT 2800. It is possible to read single elements of the list by using the corresponding subindex. The subindexes start at 1 and follow the order of the parameter numbers.

Each parameter holds up to 116 elements (parameter numbers).

When a 0 is returned as parameter number the list ends.

VLT® 2800 Series

92 MG.27.A2.22 - VLT® is a registered Danfoss trademark

VLT® 2800 Series

Technical functions

600-605 Operating Data Value: Par. no. Description Display text Unit Range 600 Operating hours (OPERATING HOURS) Hours 0-130,000.0 601 Hours run (RUNNING HOURS) Hours 0-130,000.0 602 kWh counter (KWH COUNTER) kWh Depends on unit 603 Number of power-ups (POWER-UPS) Number of times 0-9999 604 Number of overtemperatures (OVERTEMPS) Number of times 0-9999 605 Number of overvoltages (OVERVOLTS) Number of times 0-9999

Function:

These parameters can be read out via the serial communication port and the LCP control unit.

Description of choice:

Parameter 600, Operating hours:

Gives the number of hours the adjustable frequency drive has been operating. The value is saved every hour and when there is a line failure. This value cannot be reset.

Parameter 601, Hours run:

Gives the number of hours the motor has been operating since the reset in parameter 619 Reset of hours run counter. The value is saved every hour and when there is a line failure.

Parameter 602, kWh counter:

Gives the adjustable frequency drive's output energy in kWh. The calculation is based on the mean kW value over one hour. This value can be reset using parameter 618 Reset of kWh counter. Range: 0 - depends on unit.

615 Fault log: Error code

(F.LOG: ERROR COD)

Value:

[Index 1 - 10] Error code: 0 - 99

Function:

In this parameter it is possible to see the reason for a trip (cut-out of the variable frequency drive) occurring. 10 [1-10] log values are defined. The lowest log number [1] contains the latest/most recently saved data value. The highest log number [10] contains the oldest data value saved. If a trip occurs, it is possible to see the cause, time and a possible value of the output current or output voltage.

Description of choice:

Given as a fault code, in which the number refers to a table. See the table in Warnings/alarm messages.

Programming

Parameter 603, Number of power-ups:

Gives the number of power-ups of the supply voltage undertaken on the adjustable frequency drive.

Parameter 604, Number of overtemperatures:

gives the number of overtemperature faults that have been registered on the adjustable frequency drive's heatsink.

Parameter 605, Number of overvoltages:

gives the number of overvoltages of the intermediate circuit voltage in the adjustable frequency drive. This is only counted when Alarm 7 Overvoltage is active.

616 Fault log: Time

(F. LOG: TIME)

Value:

[Index 1 - 10] Hours: 0 - 130,000.0

Function:

In this parameter, it is possible to see the total number of operating hours in connection with the last 10 trips. 10 [1-10] log values are denoted. The lowest log number [1] contains the latest/most recently saved data value, and the highest log number [10] contains the oldest data value.

Description of choice:

NOTE

Read out as one value. Parameters 615-617 Fault log cannot be read out via the integral control unit.

= factory setting, () = display text, [] = value for use in communication via serial communication port

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VLT® 2800 Series

617 Fault log: Value

(F.LOG: VALUE)

Value:

[Index 1 - 10] Value: 0 - 9999

Function:

In this parameter it is possible to see at which value a trip occurred. The unit of the value depends on which alarm is active in parameter 615 Fault log: Fault code .

Description of choice:

Read out as one value.

618 Reset of kWh counter

(RESET KWH COUNT)

Value:

No reset (DO NOT RESET) [0]

Reset (RESET COUNTER) [1]

Function:

Resetting parameter 602 kWh counter to zero.

Description of choice:

If Reset [1]is selected and you press the [OK] key, the variable frequency drive's kWh counter is reset to zero. This parameter cannot be selected via serial communication.

NOTE

When the [OK] key is activated, the counter is reset to zero.

619 RESET RUNNING HOURS COUNTER

(RESET RUN. HOUR)

Value:

No reset (DO NOT RESET) [0]

Reset (RESET COUNTER) [1]

Function:

Resetting of parameter 601 Hours run to zero.

Description of choice:

If Reset [1] is selected and you press the [OK] key, the

variable frequency drive's parameter 601 is reset to

zero Hours run. This parameter cannot be selected via

serial communication.

NOTE

When the [OK] key is activated the parameter is reset to zero.

620 Operation Mode

(OPERATION MODE)

Value:

Normal operation (NORMAL OPERATION) [0]

Control card test (CONTROL CARD TEST) [2]

Initialize (INITIALIZE) [3]

Function:

In addition to its normal function, this parameter can

be used to test the control card.

There is also the opportunity to perform an initialization

at the factory setting for all parameters in all Setups,

with the exception of parameters 500 Address, 501

Baudrate, 600-605 Operating data and 615-617 Fault

log.

Description of choice:

Normal function [0] is used for normal operation of the

motor.

Control card test [2] is selected if you wish to check the

control card's analog/digital inputs, analog/digital out-

puts, relay outputs and 10 V and 24 V voltages.

The test is performed as follows:

27 - 29 - 33 - 46 are connected.

50 - 53 are connected.

42 - 60 are connected.

12 - relay terminal 01 is connected.

18 - relay terminal 02 is connected.

19 - relay terminal 03 is connected.

See also the DeviceNet manual MG.90.BX.YY for fur-

ther details.

= factory setting, () = display text, [] = value for use in communication via serial communication port

94 MG.27.A2.22 - VLT® is a registered Danfoss trademark

Use the following procedure for the control card test:

1. Select control card test.

2. Disconnect the AC line voltage and wait until the light in the display has disappeared.

3. Mount according to drawing and description.

4. Connect the AC line voltage.

5. The adjustable frequency drive automatically undertakes a test of the control card.

VLT® 2800 Series

If the adjustable frequency drive displays a fault code from 37-45, the control card test has failed. Change the control card to start up the adjustable frequency drive. If the adjustable frequency drive comes into Display mode, the test is OK. Remove the test connector and the adjustable frequency drive is ready for operation. Parameter 620 Operating mode is automatically set to

Normal operation [0].

Initialization [3] is selected if you wish to use the unit's

factory setting. Procedure for initialization:

Select Initialization [3].

2. Disconnect the AC line voltage and wait until the light in the display has disappeared.

3. Connect the AC line voltage.

4. An initialization is performed in all parameters in all Setups, with the exception of parameters 500 Address, 501 Baudrate, 600-605 Operating data and 615-617 Fault log.

Programming

= factory setting, () = display text, [] = value for use in communication via serial communication port

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VLT® 2800 Series

621-642 Nameplate Value: Par. no 621 Unit type (DRIVE TYPE) 624 Software version (SOFTWARE VERSION) 625 LCP identification no. (LCP VERSION) 626 Database identification no. (DATABASE VER.) 627 Power parts version (POWER UNIT DB ID) 628 Application option type (APP. OPTION) 630 Communication option type (COM. OPTION) 632 BMC software identification (BMC SOFTWARE ID) 634 Unit identification for communication (UNIT ID) 635 Software parts no. (SW. PART NO.) 640 Software version (SOFTWARE VERSION) 641 BMC software identification (BMC2 SW) 642 Power card identification (POWER ID)

Description Nameplate

Display text

Function:

The unit's main data can be read out from parameters 621 to 635 Nameplate using the LCP 2 control unit or serial communication. Parameters 640-642 can also be seen on the unit's integral display.

Description of choice:

Parameter 621 Nameplate: Unit type:

Gives unit size and line voltage. Example: VLT 2811 380 - 480 V.

Parameter 624 Nameplate: Software version no.

The unit's present software version number appears here. Example: V 1.00

Parameter 625 Nameplate: LCP 2 ID number:

The ID number of the unit's LCP 2 appears here. Example: ID 1.42 2 kB

Parameter 626 Nameplate: Database ID number:

The ID number of the software's database appears here. Example: ID 1.14.

Parameter 627 Nameplate: Power section version:

The ID number of the unit's power section appears here. Example: ID 1.15.

Parameter 628 Nameplate: Application option type:

Here you can see which types of application options are installed in the adjustable frequency drive.

Parameter 630 Nameplate: Communication option type:

Here you can see which types of communication options are installed in the adjustable frequency drive.

Parameter 632 Nameplate: BMC software identification:

The ID number of the BMC software appears here.

Parameter 634 Nameplate: Unit identification for communication:

The ID number for communication appears here.

Parameter 635 Nameplate: Software section no.:

The software section number appears here.

Parameter 640 Nameplate: Software version:

The unit's present software version number appears here. Example: 1.00

Parameter 641 Nameplate: BMC software identification:

The ID number of the BMC software appears here.

Parameter 642 Nameplate: Power card identification:

The ID number of the unit's power part appears here. Example: 1.15

Parameter 700 -

Only for wobble functions: To use this function or for further information, please see MI29J2xx.

= factory setting, () = display text, [] = value for use in communication via serial communication port

96 MG.27.A2.22 - VLT® is a registered Danfoss trademark

678 Configure Control Card

(CONFIG CONTROL CARD)

Value:

Standard version (STANDARD VERSION) [1]

Profibus 3 Mbaud Version (PROFIBUS 3 MB Ver.) [2]

Profibus 12 Mbaud Version (PROFIBUS 12 MB Ver.) [3]

Function:

This parameter enables a configuration of a Profibus control card. The default value depends on the produced unit, which is also the maximum obtainable value. This means that a control card can only be downgraded to a lower performance version.

VLT® 2800 Series

Programming

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VLT® 2800 Series

Warnings/alarm messages

A warning or an alarm will appear in the display as a numerical code Err. xx. A warning will be shown on the display until the fault has been corrected, while an alarm will continue to flash until the [STOP/RESET] key is activated.The table shows the various warnings and alarms, and whether the fault locks the adjustable frequency drive. After a Trip-locked the line supply is cut off and the fault is corrected. The line supply is reconnected and the adjustable frequency drive is reset. The adjustable frequency drive is now ready. A Trip can be reset manually in three ways:

1. Via the operating key [STOP/RESET].

2. Via a digital input.

No Description Warning Alarm Trip

2 Live zero error (LIVE ZERO ERROR) X X X 4 Line phase loss (LINE PHASE LOSS) X X X 5 Voltage warning high (DC LINK VOLTAGE HIGH) X 6 Voltage warning low (DC LINK VOLTAGE LOW) X 7 Overvoltage (DC LINK OVERVOLT) X X X 8 Undervoltage (DC LINK UNDERVOLT) X X X 9 Inverter overload (INVERTER TIME) X X 10 Motor overloaded (MOTOR, TIME) X X 11 Motor thermistor (MOTOR THERMISTOR) X X 12 Current limit (CURRENT LIMIT) X X 13 Overcurrent (OVERCURRENT) X X X 14 Ground fault (GROUND FAULT) X X 15 Switch mode fault (SWITCH MODE FAULT) X X 16 Short-circuit (CURR. SHORT CIRCUIT) X X 17 Serial communication timeout (STD BUS TIMEOUT) X X 18 HPFB bus timeout (HPFB TIMEOUT) X X 33 Out of frequency range (OUT FREQ RNG/ROT LIM) X 34 HPFB communication fault (PROFIBUS OPT. FAULT) X X 35 Soft-charge fault (SOFT-CHARGE FAULT) X X 36 Overtemperature (OVERTEMPERATURE) X X 37-45 Internal fault (INTERNAL FAULT) X X 50 AMT not possible X 51 AMT fault re. nameplate data (AMT TYPE.DATA FAULT) X 54 AMT wrong motor (AMT WRONG MOTOR) X 55 AMT timeout (AMT TIMEOUT) X 56 AMT warning during AMT (AMT WARN. DURING AMT) X 99 Locked (LOCKED) X

3. Via serial communication.

It is also possible to choose an automatic reset in parameter 405 Reset function. When a cross appears in both warning and alarm, this can mean that a warning comes before an alarm. It can also mean that it is possible for the user to program whether a warning or an alarm will appear for a given fault. For example, this is possible in parameter 128 Motor thermal protection. After a trip, the motor will coast, and alarm and warning will blink on the adjustable frequency drive; but if the fault disappears, only the alarm will blink. After a reset, the adjustable frequency drive will be ready to start operation again.

locked

LED indication

Warning

Alarm red

Trip-locked yellow and red

98 MG.27.A2.22 - VLT® is a registered Danfoss trademark

yellow

WARNING/ALARM 2: Live zero fault

The voltage or current signal on terminal 53 or 60 is below 50% of the preset value in parameter 309 or 315 Terminal, min. scaling.

VLT® 2800 Series

WARNING/ALARM 4: Mains phase fault

No phase on mains supply side. Check the supply voltage to the adjustable frequency drive. This fault is only active in 3-phase mains supply. The alarm can also occur when the load is pulsing. In this instance the pulses must be dampened, e.g. using an inertia disc.

WARNING 5: Voltage warning high

If the intermediate circuit voltage (UDC) is higher than Voltage warning high the adjustable frequency drive will give a warning and the motor will continue to run unchanged. If the UDC remains above the voltage warning limit, the inverter will trip after a set time. The time depends on the device, and is set at 5 - 10 sec. Note: The adjustable frequency drive will trip with an alarm 7 (overvoltage). A voltage warning can occur when the connected mains voltage is too high. Check whether the supply voltage is suitable for the adjustable frequency drive, see Technical data. A voltage warning can also occur if the motor frequency is reduced too quickly due to ramp down time being too short.

WARNING 6: Voltage warning low

If the intermediate circuit voltage (UDC) is lower than Voltage warning low the adjustable frequency drive will give a warning and the motor will continue to run unchanged. A voltage warning can occur when the connected mains voltage is too low. Check whether the supply voltage is suitable for the adjustable frequency drive, see Technical data. When the adjustable frequency drive is switched off a brief warning 6 (and warning 8) appears.

WARNING/ALARM 7: Overvoltage

If the intermediate voltage (UDC) goes over the inverter's Overvoltage limit the inverter will be switched off until the UDC has once more fallen below the overvoltage limit. If the UDC remains above the overvoltag limit the inverter will trip after a set time. The time depends on the device, and is set at 5 - 10 sec. An overvoltage in the UDC can occur when the motor frequency is reduced too quickly due to ramp down time being too short. When the inverter is switched off a trip reset is generated. Note: Voltage warning high (warning 5) will thus also be able to generate an alarm 7.

dervoltage limit, the inverter will trip after a set time. The time depends on the device, and is set at 2 - 15 sec. An undervoltage can occur when the connected mains voltage is too low. Check whether the supply voltage is suitable for the adjustable frequency drive, see Technical data. When the adjustable frequency drive is switched off a alarm 8 (and alarm 6) is displayed briefly and a trip reset is generated. Note: Voltage warning low (warning 6) will thus also be able to generate an alarm 8.

WARNING/ALARM 9: Inverter overload

Electronic thermal inverter protection indicates that the adjustable frequency drive is close to tripping due to overloading (output current too high for too long). The counter for electronic thermal inverter protection gives a warning at 98% and trips at 100% accompanied by an alarm. The adjustable frequency drive cannot be reset until the counter drops below 90%. This fault arises because the adjustable frequency drive has been overloaded for too long.

WARNING/ALARM 10: Motor overloaded

According to the electronic thermal inverter protection the motor is too hot. In parameter 128 the user can select whether the adjustable frequency drive should emit a warning or an alarm when the counter reaches 100%. This fault is due to the motor being overloaded by more than 100% for too long. Check that motor parameters 102-106 are set correctly.

WARNING/ALARM 11: Motor thermistor

The motor is too hot or the thermistor/thermistor connection has been disconnected. In parameter 128 Thermal motor protection the user can select whether the frequency transformer emits a warning or an alarm. Check that the PTC thermistor is correctly connected between terminals 18, 19, 27 or 29 (digital input) and terminal 50 (+ 10 V supply).

WARNING/ALARM 12: Current limit

The output current is greater than the value in parameter 221 Current Limit

, and the adjustable frequen-

LIM

cy drive will trip after a set time, selected in parameter 409 Trip delay overcurrent.

All about VLT 2800

WARNING/ALARM 8: Undervoltage

If the intermediate circuit voltage (UDC) is lower than the inverter's Undervoltage limit the inverter will be switched off until the UDC once more goes above the undervoltage limit. If the UDC remains under the un-

MG.27.A2.22 - VLT® is a registered Danfoss trademark 99

VLT® 2800 Series

WARNING/ALARM 13: Overcurrent

The inverter's peak current limit (approx. 200% of rated output current) has been exceeded. The warning will last approx. 1-2 sec, and the adjustable frequency drive will then trip and emit an alarm. Switch off the adjustable frequency drive and check whether the motor shaft can be turned, and whether the size of the motor is suitable for the adjustable frequency drive.

ALARM 14: Earth fault

There is a discharge from the output phases to earth, either in the cable between the adjustable frequency drive and the motor, or in the motor. Turn off the adjustable frequency drive and remove the earth fault.

ALARM 15: Switch mode fault

Fault in switch mode power supply (internal supply). Contact your Danfoss supplier.

ALARM: 16: Short-circuit

There is a short-circuit on the motor terminals or in the motor. Disconnect the mains supply to the adjustable frequency drive and remove the short-circuit.

WARNING/ALARM 17: Serial communication timeout

There is no serial communication to the adjustable frequency drive. The warning will only be active when 514 Bus timeout function is set to a value other than OFF. If parameter 514 Bus timeout function is set to Stop and trip [5], it will first give a warning and then ramp down and trip out accompanied by an alarm. Parameter 513 Bus timeout can if required be increased.

WARNING/ALARM 18: HPFB bus timeout

There is no serial communication to the adjustable frequency drive's communication option card. This warning will only be active when parameter 804 Bus timeout function is set to a value other than OFF. If parameter 804 Bus timeout function is set to Stop and trip, it will first give a warning and then ramp down and trip out accompanied by an alarm. Parameter 803 Bus time- out can if required be increased.

WARNING 33: Out of frequency range

This warning is active if the output frequency has reached Output frequency low limit (parameter 201) or Output frequency high limit (parameter 202). If the adjustable frequency drive is in Process regulation, closed loop (parameter 100) the warning will be active in the display. If the adjustable frequency drive is in another mode than Process regulation, closed loop, bit 008000

Out of frequency range in extended status word will be active, but there will not be a warning in the display.

WARNING/ALARM 34: HPFB communication fault

Communication fault only occurs in Fieldbus versions. Regarding alarmtype, please see parameter 953 in fieldbus literature.

ALARM 35: Inrush fault

This alarm occurs when the adjustable frequency drive has been connected to the mains supply too many times within 1 minute.

WARNING/ALARM 36: Overtemperature

If the temperature inside the power module rises above 75 - 85 °C (depending on the device) the adjustable frequency drive will emit a warning, and the motor will continue to run unchanged. If the temperature continues to rise, the switch frequency is reduced automatically. See Temperature-dependent switching frequency. If the temperature inside the power module rises above 92 - 100 °C (depending on the unit) the adjustable frequency drive will cut out. The temperature fault cannot be reset until the temperature has dropped to below 70 °C. The tolerance is ± 5 °C. The temperature can be caused by the following:

The ambient temperature too high.

Motor cable too long.

Too high mains voltage.

ALARM 37-45: Internal fault

If one of these failures occurs, please contact Danfoss.

Alarm 37, internal fault number 0: Communication fault between control card and BMC.

Alarm 38, internal fault number 1: Flash EEPROM fault on control card.

Alarm 39, internal fault number 2: RAM fault on control card.

Alarm 40, internal fault number 3: Calibration constant in EEPROM.

Alarm 41, internal fault number 4: Data values in EEPROM.

Alarm 42, internal fault number 5: Fault in motor parameter database.

Alarm 43, internal fault number 6: General power card fault.

100 MG.27.A2.22 - VLT® is a registered Danfoss trademark

Danfoss VLT 2800 Series, VLT 2822, VLT 2805-2815, VLT 2803-2815, VLT 2840 General Information Manual

Specifications and Main Features

Frequently Asked Questions

User Manual