VLT Micro Drive FC 51 Contents
Contents
1. Safety
Safety Instructions 3
Approvals 3
General Warning 3
Avoid unintended Start 4
Before Commencing Repair Work 5
2. Introduction
Type Code 7
3. Programming
How to Programme 9
Programming with MCT-10 9
Programming with LCP 11 or LCP 12 9
Status Menu 11
Quick Menu 11
Main Menu 12
4. Parameter Descriptions
3
7
9
13
Parameter group 0: Operation/Display 13
Parameter Group 1: Load/Motor 18
Parameter Group 2: Brakes 27
Parameter Group 3: Reference/Ramps 30
Parameter Group 4: Limits/Warnings 36
Parameter Group 5: Digital In/Out 39
Parameter Group 6: Analogue In/Out 44
Parameter Group 7: Controllers 50
Parameter Group 8: Communication 52
Parameter Group 13: Smart Logic 57
Parameter Group 14: Special Functions 65
Parameter Group 15: Drive Information 68
Parameter Group 16: Data Readouts 71
5. Parameter Lists
6. Troubleshooting
Index
77
81
82
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1
1. Safety VLT Micro Drive FC 51
2
MG.02.C2.02 - VLT® is a registered Danfoss trademark
VLT Micro Drive FC 51 1. Safety
1. Safety
1.1.1. High Voltage Warning
The voltage of the frequency converter is dangerous whenever it is connected to
mains. Incorrect installation 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.
1.1.2. Safety Instructions
• Make sure the frequency converter is properly connected to earth.
• Do not remove mains connections, motor connections or other power connections while
the frequency converter is connected to power.
• Protect users against supply voltage.
• Protect the motor against overloading according to national and local regulations.
• The earth leakage current exceeds 3.5 mA.
• The [OFF] key is not a safety switch. It does not disconnect the frequency converter from
mains.
1
1.1.3. Approvals
1.1.4. General Warning
Warning:
Touching the electrical parts may be fatal - even after the equipment has been disconnected from mains.
Also make sure that other voltage inputs have been disconnected, (linkage of DC
intermediate circuit).
Be aware that there may be high voltage on the DC link even when the LEDs are
turned off.
Before touching any potentially live parts of the VLT Micro Drive, wait at least 4
minutes for all sizes.
Shorter time is allowed only if indicated on the nameplate for the specific unit.
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1
1. Safety VLT Micro Drive FC 51
Leakage Current
The earth leakage current from the VLT Micro Drive FC 51 exceeds 3.5 mA. According
to IEC 61800-5-1 a reinforced Protective Earth connection must be ensured by
means of a min. 10mm² Cu or an addtional PE wire - with the same cable cross
section as the Mains wiring - must be terminated separately.
Residual Current Device
This product can cause a D.C. current in the protective conductor. Where a residual
current device (RCD) is used for extra protection, only an RCD of Type B (time delayed) shall be used on the supply side of this product. See also Danfoss Application
Note on RCD, MN.90.GX.YY.
Protective earthing of the VLT Micro Drive and the use of RCDs must always follow
national and local regulations.
Motor overload protection is possible by setting Parameter 1-90 Motor thermal protection to the value ETR trip. For the North American market: ETR functions provide
class 20 motor overload protection, in accordance with NEC.
Installation in high altitudes:
By altitudes above 2km, please contact Danfoss Drives regarding PELV.
1.1.5. IT Mains
IT Mains
Installation on isolated mains source, i.e. IT mains.
Max. supply voltage allowed when connected to mains: 440 V.
As an option, Danfoss offers line filters for improved harmonics performance.
1.1.6. Avoid unintended Start
While the frequency converter is connected to mains, the motor can be started/stopped using
digital commands, bus commands, references or via the Local Control Panel.
• Disconnect the frequency converter from mains whenever personal safety considerations
make it necessary to avoid unintended start of any motors.
• To avoid unintended start, always activate the [OFF] key before changing parameters.
1.1.7. Disposal Instruction
Equipment containing electrical components must not be disposed of
together with domestic waste.
It must be separately collected with electrical and electronic waste
according to local and currently valid legislation.
4
MG.02.C2.02 - VLT® is a registered Danfoss trademark
VLT Micro Drive FC 51 1. Safety
1.1.8. Before Commencing Repair Work
1. Disconnect FC 51 from mains (and external DC supply, if present.)
2. Wait for 4 minutes for discharge of the DC-link.
3. Disconnect DC bus terminals and brake terminals (if present)
4. Remove motor cable
1
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2
2. Introduction VLT Micro Drive FC 51
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MG.02.C2.02 - VLT® is a registered Danfoss trademark
VLT Micro Drive FC 51 2. Introduction
2. Introduction
2.1.1. FC Identification
Below is an example of an identification sticker. This sticker is situated on the frequency converter
and shows the type and options fitted to the unit. See following tables for details, how to read the
Type code string.
Illustration 2.1: This example shows the identification sticker.
2
2.1.2. Type Code
Description Pos Possible choice
Product group 1-3 Adjustable Frequency Converters
Series and product type 4-6 Micro Drive
Power size 7-10 0.18 - 7.5 kW
Mains voltage 11-12 S2: Single phase 200 - 240 V AC
Enclosure 13-15 IP20/Chassis
RFI filter 16-17 HX: No RFI filter
Brake 18 B: Brake chopper included
Display 19 X: No Local Control Panel
Coating PCB 20 C: Coated PCB
Mains option 21 X: No mains option
Adaptation A 22 No adaptation
Adaptation B 23 No adaptation
Software release 24-27 Latest release - std. software
T 2: Three phase 200 - 240 V AC
T 4: Three phase 380 - 480 V AC
H1: RFI filter class A1/B
H3:RFI filter A1/B (reduced cable length)
X: No brake chopper included
N: Numerical Local Control Panel (LCP)
P: Numerical Local Control Panel (LCP) with potentiometer
X. No coated PCB
Table 2.1: Type code description
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2
2. Introduction VLT Micro Drive FC 51
2.1.3. Symbols
Symbols used in this Programming Guide.
NB!
Indicates something to be noted by the reader.
Indicates a general warning.
Indicates a high-voltage warning.
* Indicates default setting
2.1.4. Abbreviations and Standards
Terms: Abbreviations: SI-units: I-P units:
Acceleration m/s² ft/s²
American wire gauge AWG
Automatic Motor Tuning AMT
Current A Amp
Current limit
Energy J = N·m ft-lb, Btu
Fahrenheit ˚F
Frequency Converter FC
Frequency Hz Hz
Kilohertz kHz
Local Control Panel LCP
Milliampere mA
Millisecond ms
Minute min
Motion Control Tool MCT
Motor Type Dependent M-TYPE
Newton Metres Nm
Nominal motor current
Nominal motor frequency
Nominal motor power
Nominal motor voltage
Parameter par.
Protective Extra Low Voltage PELV
Power W Btu/hr, hp
Pressure Pa = N/m²
Rated Inverter Output Current
Revolutions Per Minute RPM
Size Related SR
Temperature ˚C ˚F
Time s s,hr
Torque limit
Voltage V V
I
LIM
I
M,N
f
M,N
P
M,N
U
M,N
I
INV
T
LIM
psi, psf, ft of
water
Table 2.2: Abbreviation and Standards table .
8
MG.02.C2.02 - VLT® is a registered Danfoss trademark
VLT Micro Drive FC 51 3. Programming
3. Programming
3.1. How to Programme
3.1.1. Programming with MCT-10
The frequency converter can be programmed from a PC via RS485 com-port by installing the
MCT-10 Set-up Software.
This software can either be ordered using code number 130B1000 or downloaded from the Danfoss Web site: www.danfoss.com, Business Area: Motion Controls.
Please refer to manual MG.10.RX.YY.
3.1.2. Programming with LCP 11 or LCP 12
The LCP is divided into four functional groups:
1. Numeric display.
2. Menu key.
3. Navigation keys.
4. Operation keys and indicator lights (LEDs).
3
Illustration 3.1: LCP 12 with potentiometer
The display:
A number of information can be read from the display.
Set-up number shows the active set-up and
the edit set-up. If the same set-up acts as
both active and edit set-up, only that set-up
number is shown (factory setting).
When active and edit set-up differ, both numbers are shown in the display (Setup 12). The
number flashing, indicates the edit set-up.
MG.02.C2.02 - VLT® is a registered Danfoss trademark
Illustration 3.2: LCP 11 without potentiometer
Illustration 3.3: Indicating Set-up
9
3. Programming VLT Micro Drive FC 51
The small digits to the left are the selected
parameter number .
3
Illustration 3.4: Indicating selected par. no.
The large digits in the middle of the display
show the value of the selected parameter.
Illustration 3.5: Indicating value of selected par.
The right side of the display shows the unit
of the selected parameter. This can be either
Hz, A, V, kW, HP, %, s or RPM.
Illustration 3.6: Indicating unit of selected par.
Motor direction is shown to the bottom left
of the display - indicated by a small arrow
pointing either clockwise or counterclockwise.
Illustration 3.7: Indicating motor direction
Use the [MENU] key to select one of the following menus:
Status Menu:
The Status Menu is either in
currently selected readout parameter is shown in the display.
Hand on Mode
In
Quick Menu:
Displays Quick Menu parameters and their settings. Parameters in the Quick Menu can be accessed
and edited from here. Most applications can be run by setting the parameters in the Quick Menus.
Main Menu:
Displays Main Menu parameters and their settings. All parameters can be accessed and edited
here. A parameter overview is found later in this chapter.
the local LCP reference is displayed.
Readout Mode
or
Hand on Mode
. In
Readout Mode
the value of the
10
MG.02.C2.02 - VLT® is a registered Danfoss trademark
VLT Micro Drive FC 51 3. Programming
Indicator lights:
• Green LED: Power is on the frequency converter.
• Yellow LED: Indicates a warning.
• Flashing red LED: Indicates an alarm.
Navigation Keys:
[Back]: For moving to the previous step or layer in the navigation structure.
Arrows [▲] [▼]: For manoeuvring between parameter groups, parameters and within parame-
ters.
[OK]: For selecting a parameter and for accepting changes to parameter settings.
Operation Keys:
A yellow light above the operation keys indicates the active key.
[Hand on]: Starts the motor and enables control of the frequency converter via the LCP.
[Off/Reset]: The motor stops except in alarm mode. In that case the motor will be reset.
[Auto on]: The frequency converter is controlled either via control terminals or serial communi-
cation.
[Potentiometer] (LCP12): The potentiometer works in two ways depending on the mode in
which the frequency converter is running.
Auto Mode
In
Hand on Mode
In
the potentiometer acts as an extra programmable analog input.
the potentiometer controls local reference.
3
3.2. Status Menu
After power up the Status Menu is active. Use
the [MENU] key to toggle between Status,
Quick Menu and Main Menu.
Arrows [▲] and [▼] toggles between the
choices in each menu.
The display indicates the status mode with a
small arrow above “Status”.
3.3. Quick Menu
The Quick Menu gives easy access to the most frequently used parameters.
1. To enter the Quick Menu, press
[MENU] key until indicator in display
is placed above
press [OK].
2. Use [▲] [▼] to browse through the
parameters in the Quick Menu.
3. Press [OK] to select a parameter.
4.
Use [▲] [▼] to change the value of a
parameter setting.
5. Press [OK] to accept the change.
6. To exit, press either [Back] twice to
enter
Status
to enter
Main Menu
Quick Menu
, or press [Menu] once
.
, then
Illustration 3.8: Indicating Status mode
Illustration 3.9: Indicating Quick Menu mode
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3
3. Programming VLT Micro Drive FC 51
3.4. Main Menu
The Main Menu gives access to all parameters.
1. To enter the Main Menu, press
[MENU] key until indicator in display
is placed above
2. Use [▲] [▼] to browse through the
parameter groups.
3. Press [OK] to select a parameter
group.
4.
Use [▲] [▼] to browse through the
parameters in the specific group.
5. Press [OK] to select the parameter.
6. Use [▲] [▼] to set/change the parameter value.
7. Press [OK] to accept the value.
8. To exit, press either [Back] twice to
Quick Menu
enter
once to enter
Main Menu
, or press [Menu]
Status
.
Illustration 3.10: Indicating Main Menu mode
.
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MG.02.C2.02 - VLT® is a registered Danfoss trademark
VLT Micro Drive FC 51 4. Parameter Descriptions
4. Parameter Descriptions
4.1. Parameter group 0: Operation/Display
0-03 Regional Settings
Option: Function:
In order to meet the needs for different default settings in different parts of the world, par. 0-03,
mented in the frequency converter. The selected setting
influences the default setting of the motor nominal frequency.
Regional Settings
, is imple-
4
International Sets default of par. 1-23,
*
[0 ]
[1] US Sets default of par. 1-23,
NB!
This parameter cannot be adjusted while motor
runs.
0-04 Operating State at Power-up (Hand Mode)
Option: Function:
This parameter controls whether or not the frequency converter
should start running the motor when powering up after a power
down in Hand mode.
NB!
If LCP with potmeter is mounted, reference is set
according to actual potmeter value.
[0] Resume Frequency converter starts in same Hand or Off State as when
powered off.
Local reference is stored and used after power-up.
Motor Frequency
Motor Frequency
, to 50 Hz.
, to 60 Hz.
[1]
[2] Forced Stop, Ref=0 Frequency converter powers up in Off State meaning that motor
Forced Stop, Ref=Old Frequency converter powers up in Off State meaning that motor
*
4.1.1. 0-1* Set-up Handling
User defined parameters and miscellaneous external inputs (eg. bus, LCP, analog/digital inputs,
feedback, etc.) controls the functionality of the frequency converter.
A complete set of all parameters controlling the frequency converter is called a set-up. The Micro
Drive FC 51 contains 2 set-ups,
MG.02.C2.02 - VLT® is a registered Danfoss trademark
is stopped after power up.
Local reference is stored and used after power-up.
is stopped after power up.
Local reference is set to 0. Thus motor will not start running
before local reference has been increased.
Set-up1
and
Set-up 2
.
13
4
4. Parameter Descriptions VLT Micro Drive FC 51
Furthermore, a fixed set of factory settings can be copied into one or more set-ups.
Some of the advantages of having more than one set-up in the frequency converter are
• Run motor in one set-up (Active Set-up) while updating parameters in another set-up
(Edit Set-up)
• Connect various motors (one at a time) to frequency converter. Motor data for various
motors can be placed in different set-ups.
• Rapidly change settings of frequency converter and/or motor while motor is running (eg.
ramp time or preset references) via bus or digital inputs.
Active Set-up
The
digital input terminal and/or via the bus control word.
0-10 Active Set-up
Option: Function:
can be set as
NB!
FactorySet-up
Multi Set-up
cannot be used as
Active Set-up
Shifts between set-ups can only happen when
•the motor is coasted
OR
• the set-ups between which the shift happens are linked
If changing between set-ups that are not linked, the change will
not happen before motor is coasted.
where the active set-up is selected via input on a
Active Set-up
controls the motor.
to each other (see par. 0-12,
.
Linked Set-ups
).
NB!
The motor is only considered stopped when it is
coasted.
[1 ]
[2] Set-up 2
[9] Multi Set-up Select the active set-up via digital input and/or bus, see par.
0-11 Edit Set-up
Option: Function:
[1 ]
[2] Set-up 2 Update parameters in
Set-up 1
*
Set-up 1 Update parameters in
*
Set-up 1
Set-up 2
5-1* choice [23].
The
converter from either LCP or bus. It can be identical or different
from the
All set-ups can be edited during operation, independently of the
active set-up.
is active.
is active.
Edit Set-up
Active Set-up
is for updating parameters in the frequency
.
Set-up 1
Set-up 2
.
.
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MG.02.C2.02 - VLT® is a registered Danfoss trademark
VLT Micro Drive FC 51 4. Parameter Descriptions
[9] Active Set-up Update parameters in set-up selected as
0-10).
0-12 Link Set-ups
Option: Function:
The link ensures synchronizing of the “not changeable during
operation” parameter values enabling shift from one set-up to
another during operation.
If the set-ups are not linked, a change between them is not
possible while the motor is running. Thus the set-up change
does not occur until the motor is coasted.
[0] Not linked Leaves parameters unchanged in both set-ups and cannot be
changed while motor runs.
[1 ]
Linked Copy parameters “not changeable during operation” parameter
*
values into presently selected
NB!
This parameter cannot be changed while motor
runs.
Edit Set-up
Active Set-up
.
(see par.
4
4.1.2. 0-4* LCP Keypad
The frequency converter can operate in the following three modes:
Hand:
The frequency converter is locally operated and does not allow any remote control. By
activating Hand a start signal is given.
OFF:
The frequency converter stops with a normal stop ramp. When Off is chosen the frequency
converter can only be started by pressing either Hand or Auto on the LCP.
Auto:
In Auto-mode the frequency converter can be remote controlled (bus/digital).
0-40 [Hand on] Key on LCP
Option: Function:
[0] Disabled Hand-on key has no function.
Enabled Hand-on key is functional.
*
[1 ]
0-41 [Off/Reset] Key on LCP
Option: Function:
[0] Disable Off/Reset Off/reset key has no function.
Enable Off/Reset Stop signal and reset of any faults.
*
[1 ]
[2] Enable Reset Only Reset only. Stop (Off) function is disabled.
Hand, Off
and
Auto
.
0-42 [Auto on] Key on LCP
Option: Function:
[0] Disabled Auto-on key has no function.
[1 ]
Enabled Auto-on key is functional.
*
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4
4. Parameter Descriptions VLT Micro Drive FC 51
4.1.3. 0-5* Copy/Save
0-50 LCP Copy
Option: Function:
The detachable LCP of the frequency converter can be used for
storing setups, and thus for transferring data when moving parameter settings from one frequency converter to another.
NB!
LCP Copy
ONLY when the motor is coasted.
[1] All to LCP Copy all setups from the frequency converter into the LCP.
[2] All from LCP Copy all setups from LCP to frequency converter.
[3] Size indep. from LCP Copy non motor size dependent data from LCP to frequency
converter
can only be activated from the LCP and
0-51 Set-up Copy
Option: Function:
Use this function to copy a set-up content into the
In order to be able to make a set-up copy ensure that
•the motor is coasted
• par. 0-10,
[0 ]
[1] Copy from Set-up 1 Copy from
[2] Copy from Set-up 2 Copy from
[9] Copy from Factory
No Copy Copy function is inactive
*
.
up
.
up
Copy from Factory Settings to edit set-up chosen in par. 0-11,
Set-up
Edit set-up
Edit Set-up
Active Set-up
or
Set-up 2
Set-up 1
Set-up 2
.
[2]
NB!
The keyboard/parameter database are blocked
while Set-up Copy is running.
to edit set-up chosen in par. 0-11,
to edit set-up chosen in par. 0-11,
, is set to either
Set-up 1
.
[1]
Edit Set-
Edit Set-
4.1.4. 0-6* Password
0-60 (Main) Menu Password
Range: Function:
Use password for protection against unintended change of sensitive parameters, eg. motor parameters.
Password protected parameters can always be read, but cannot
be edited without entering the password.
16
MG.02.C2.02 - VLT® is a registered Danfoss trademark
VLT Micro Drive FC 51 4. Parameter Descriptions
0
[0 - 999] Enter the password for access to Main Menu via the [Main Menu]
*
key. Select the number that should allow for changing other
parameter values.
NB!
A password only has affect on the LCP - not on the bus communication.
0
means there is no password.
4
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4
4. Parameter Descriptions VLT Micro Drive FC 51
4.2. Parameter Group 1: Load/Motor
1-00 Configuration Mode
Option: Function:
Use this parameter for selecting the application control principle
to be used when a Remote Reference is active.
NB!
Changing this parameter will reset parameters
3-00, 3-02 and 3-03 to their default values.
NB!
This parameter cannot be adjusted while motor
runs.
[0 ]
[3] Process Closed Loop Enables process closed loop control. See par. group 7-3* for
1-01 Motor Control Principle
Option: Function:
[0] U/f Is used for parallel connected motors and/or special motor ap-
[1]
1-03 Torque Characteristics
Option: Function:
Speed Open Loop For normal speed control (References).
*
further information on PI-controller.
When running in process closed loop, par. 4-10
Direction
plications. The U/f settings are set in parameters 1-55 and 1-56.
VVC+ Normal running mode, including slip- and load compensations.
*
With more torque characteristics it is possible to run low energy
consuming, as well as high torque applications.
must be set to
NB!
When running U/f control slip- and load compensations are not included.
Clockwise
[0]
Motor Speed
Constant Torque Motor shaft output provides constant torque under variable
*
[0 ]
speed control.
[2] Automatic Energy Op-
tim.
18
MG.02.C2.02 - VLT® is a registered Danfoss trademark
This function automatically optimizes energy consumption in
centrifugal pump and fan applications. See par. 14-41
imum Magnetisation
.
AEO Min-
VLT Micro Drive FC 51 4. Parameter Descriptions
1-05 Hand Mode Configuration
Option: Function:
This parameter is only relevant when parameter 1-00
ration Mode
used for determining the reference or setpoint handling when
changing from Auto Mode to Hand Mode on the LCP.
[0] Speed Open Loop In Hand Mode the drive always ru ns i n Open Loop conf iguration
regardless of setting in par. 1-00
tentiometer (if present) or Arrow up/down determines output
frequency limited by Motor Speed High/Low Limit (parameters
4-14 and 4-12).
is set to
Process Closed Loop
Configuration Mode
[3]. The parameter is
Configu-
. Local po-
4
[2]
As configuration in
*
par. 1-00
4.2.1. 1-2* Motor Data
Enter the correct motor nameplate data (power, voltage, frequency, current and speed).
Run AMT, see par. 1-29.
Factory settings for advanced motor data, par. 1-3*, are automatically calculated.
NB!
Parameters in parameter group 1.2* cannot be adjusted while motor runs.
1-20 Motor Power [kW]/[HP] (P
Range: Function:
[0.09 kW/0.12 HP 11 kW/15 HP]
If par. 1-00
is as described above.
If par. 1-00 is set to
mode to Hand mode results in a setpoint change via local potentiometer or Arrow up/down. The change is limited by Reference Max/Min (parameters 3-02 and 3-03).
Enter motor power from nameplate data.
Two sizes down, one size up from nominal VLT rating.
Configuration Mode
Process Closed Loop
)
m.n
NB!
Changing this parameter affects par. 1-22 to 1-25,
1-30, 1-33 and 1-35.
is set to
Open Loop
[3] c han g ing f rom A uto
[1] function
1-22 Motor Voltage (U
Range: Function:
230/400V[50 - 999 V] Enter motor voltage from nameplate data.
1-23 Motor Frequency (f
Range: Function:
50 Hz
[20-400 Hz] Enter motor frequency from nameplate data.
*
MG.02.C2.02 - VLT® is a registered Danfoss trademark
m.n
)
m.n
)
19
4. Parameter Descriptions VLT Micro Drive FC 51
4
1-24 Motor Current (I
Range: Function:
M-type
dependent
1-25 Motor Nominal Speed (n
Range: Function:
M-type
Dependent
1-29 Automatic Motor Tuning (AMT)
Option: Function:
[0.01 - 26.00 A] Enter motor current from nameplate data.
*
[100 - 9999 RPM] Enter motor nominal speed from nameplate data.
*
)
m.n
)
m.n
Use AMT to optimize motor performance.
1. Stop VLT – make sure motor is at standstill
2. Choose [2] Enable AMT
3. Apply start signal
NB!
This parameter cannot be changed while motor
runs.
– Via LCP: Press Hand On
- Or in Remote On mode: Apply start signal on terminal
18
[0]
[2] Enable AMT AMT function starts running.
Off AMT function is disabled.
*
4.2.2. 1-3* Adv. Motor Data
Adjust advanced motor data using one of these methods:
1. Run AMT on cold motor. Frequency converter measures value from motor.
2. Enter X
3. Use X
plate data.
value manually. Obtain value from motor supplier.
1
default setting. Frequency converter establishes setting based on motor name-
1
NB!
This parameter cannot be changed while motor runs.
NB!
To gain optimum tuning of frequency converter,
run AMT on a cold motor.
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MG.02.C2.02 - VLT® is a registered Danfoss trademark
VLT Micro Drive FC 51 4. Parameter Descriptions
1-30 Stator Resistance (Rs)
Range: Function:
Depending
on motor
data
[Ohm] Set stator resistance value.
*
4
1-33 Stator Leakage React an ce (X1)
Range: Function:
Depending on
motor
data
1-35 Main Reactance (X2)
Range: Function:
Depending on
motor
data
[Ohm] Set stator leakage reactance of motor.
*
[Ohm] Set motor main reactance.
*
4.2.3. 1-5* Load Independent Setting
This parameter group is for setting the load independent motor settings.
1-50 Motor Magnetization at Zero Speed
Range: Function:
This parameter enables different thermal load on motor when
running at low speed.
[ 0 - 300%] Enter a percentage of rated magnetizing current. If setting is
*
100 %
too low, motor shaft torque may be reduced.
1-52 Min. Speed Normal Magnetizing [Hz]
Range: Function:
Use this parameter along with par. 1-50,
Zero Speed
MG.02.C2.02 - VLT® is a registered Danfoss trademark
.
Motor Magnetizing at
21
4. Parameter Descriptions VLT Micro Drive FC 51
4
0.0 Hz
[0.0 - 10.0 Hz] Set frequency required for normal magnetizing current. If fre-
*
quency is set lower than motor slip frequency, par. 1-50,
Magnetizing at Zero Speed
1-55 U/f Characteristic - U
Range: Function:
This parameter is an array parameter [0-5] and is only functional when par. 1-01,
0.0 V
1-56 U/f Characteristic - F
Range: Function:
[0.0 - 999.9 V] Enter voltage at each frequency point to manually form a U/f
*
characteristic matching motor. Frequency points are defined in
par. 1-56,
This parameter is an array parameter [0-5] and is only functional when par. 1-01,
is inactive.
Motor Control Principle
U/f characteristics - F
Motor Control Principle
Motor
is set to
.
is set to
U/f
U/f
[0].
[0].
0.0 Hz
[0.0 - 1000.0 Hz] Enter frequency points to manually form a U/f characteristic
*
matching motor. Voltage at each point is defined in par. 1-55,
U/f Characteristic - U
Make a U/f characteristic based on 6 definable voltages and frequencies, see below figure.
Simplify U/f characteristics by merging 2 or more points (voltages and frequencies), respectively, are set equal.
Illustration 4.1: Fig. 1 U/f characteristics
NB!
For par. 1-56 the following applies
[0] ≦ [1] ≦ [2] ≦ [3] ≦ [4] ≦ [5]
.
22
MG.02.C2.02 - VLT® is a registered Danfoss trademark
VLT Micro Drive FC 51 4. Parameter Descriptions
4.2.4. 1-6* Load Dependent setting
Parameters for adjusting the load dependent motor settings.
1-60 Low Speed Load Compensation
Range: Function:
Use this parameter to gain optimum U/f characteristic when
running at low speed.
[0-199 %] Enter percentage in relation to load when motor runs at low
*
100 %
speed.
Change-over point is automatically calculated based on motor
size.
4
1-61 High Speed Load Compensation
Range: Function:
Use this parameter to obtain optimum load compensation when
running at high speed.
100 %
1-62 Slip Compensation
Range: Function:
100 %
[0 - 199 %] Enter percentage to compensate in relation to load when motor
*
runs at high speed.
Change-over point is automatically calculated based on motor
size.
[-400 - 399 %] Compensation for load dependent motor slip.
*
Slip compensation is calculated automatically based on rated
motor speed, n
.
M,N
NB!
This function is only active when par. 1-00,
figuration Mode
and when par. 1-01,
VVC+
to
, is set to
[1].
Speed Open Loop
Motor Control Principle
Con-
[0],
, is set
MG.02.C2.02 - VLT® is a registered Danfoss trademark
23
4. Parameter Descriptions VLT Micro Drive FC 51
1-63 Slip Compensation Time
Range: Function:
0.10 s [0.05 - 5.00 s] Enter slip compensation reaction speed. A high value results in
slow reaction whereas a low value results in quick reaction.
If low-frequency resonance problems arise, use longer time setting.
4.2.5. 1-7* Start Adjustments
4
Considering the need for various start functions in different applications, it is possible to select a
number of functions in this parameter group.
1-71 Start Delay
Range: Function:
The start delay defines the time to pass from a start command
is given until the motor starts accelerating.
Setting start delay to 0.0 sec. disables
when start command is given.
0.0 s
1-72 Start Function
Option: Function:
[0] DC Hold/Delay Time Motor is energized with DC holding current (par. 2-00) during
[1] DC Brake/Delay Time Motor is energized with DC braking current (par. 2-01) during
[2]
[0.0 - 10.0 s] Enter the time delay required before commencing acceleration.
*
Par. 1-72
start delay time.
start delay time.
Coast/Delay Time Inverter is coasted during start delay time (inverter off).
*
Start Function
is active during
Start Function
Start delay time
, [1-72],
.
1-73 Flying Start
Option: Function:
Use flying start to catch a spinning motor after eg. mains dropout.
This function is not suitable for hoisting applications.
[0]
[1] Enabled Frequency converter enabled to catch spinning motor.
Disabled Flying start is not required.
*
NB!
When flying start is enabled par. 1-71,
lay
tion.
, and par. 1-72,
Start Function
, have no func-
Start De-
24
MG.02.C2.02 - VLT® is a registered Danfoss trademark
VLT Micro Drive FC 51 4. Parameter Descriptions
4.2.6. 1-8* Stop Adjustments
To meet the need for various stop functions in different application these parameters offer some
special stop features for the motor.
1-80 Function at Stop
Option: Function:
The selected function at stop is active in following situations:
• Stop command is given and output speed is ramped
down to
• Start command is removed (standby), and output
speed is ramped down to
Functions at Stop
• DC-brake command is given, and DC-brake time has
passed
• While running and calculated output speed is below
Min. Speed for Activating Functions at Stop
Min. Speed for Activating Functions at Stop
Min. Speed for Activating
.
.
.
4
[0]
[1] DC hold The motor is energized with a DC current. See par. 2-00
Coast The inverter is coasted.
*
Current
1-82 Min. Speed For Function at Stop [Hz]
Range: Function:
0.0 Hz
[0.0 - 20.0 Hz] Set the speed at which to activate par. 1-80
*
4.2.7. 1-9* Motor Temperature
With an estimated motor temperature monitor the frequency converter is able to estimate motor
temperature without having a thermistor mounted. It is thus possible to receive a warning or an
alarm, if motor temperature exceeds upper operational limit.
1-90 Motor Thermal Protection
Option: Function:
Using ETR (Electronic Terminal Relay) the motor temperature is
calculated based on frequency, speed and time. Danfoss recommends using The ETR function, if a thermistor is not present.
for more information.
Function at Stop
NB!
ETR calculation is based on motor data from group
1-2*.
DC Hold
.
[0]
[1] Thermistor Warning A thermistor connected to either digital or analog input gives a
No Protection Disables temperature monitoring.
*
warning if upper limit of motor temperature range is exceeded,
(see par. 1-93,
MG.02.C2.02 - VLT® is a registered Danfoss trademark
Thermistor Resource)
.
25
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