VLT® MICRO
Danfoss can accept no responsibility for possible errors in catalogs, brochures and other printed material. Danfoss reserves the right
to alter its products without notice. This also applies to products already on order provided that such alterations can be made
without subsequential changes being necessary in specifications already agreed.
Table of Contents
Chapter 1 Introduction
Getting Started .................................................................................1
Receiving, Inspection, and Storage ................................................... 2
Nameplate Information ..................................................................... 2
General Technical Data .....................................................................3
Specifications ................................................................................... 6
External Parts and Labels ................................................................. 7
Chapter 2 Installation and Wiring
Installation Requirements .................................................................. 8
Wiring ...............................................................................................9
Main Circuit Standard Wiring Chart ................................................. 10
Control Terminal Designations (Factory Settings) ............................. 11
Safety Precautions.......................................................................... 12
Chapter 3 Digital Keypad/Display Operation
Digital Keypad/Display Features...................................................... 14
Quick Set-up .................................................................................. 16
Operation ....................................................................................... 18
Chapter 4 Description of Parameters .............................................................. 20
Chapter 5 Summary of Parameters .................................................................62
Chapter 6 Troubleshooting and Fault Information ............................................ 69
Appendix A Dimensions ..................................................................................... 73
Appendix B Accessories .................................................................................... 75
Appendix C CE Labeling ....................................................................................77
Appendix D Serial Communication ..................................................................... 82
Document Version Number 3.10
Software Version 1.06
VLT is a registered Danfoss trade mark
VLT® MICRO
VLT® MICRO
Chapter 1
Introduction
Congratulations on your purchase of a VLT® Adjustable Frequency Drive. The VLT
®
MICRO is a high-performance / low noise general-purpose drive, manufactured using
the highest quality components and incorporating the latest micro-processor technology
and control algorithms.
The purpose of this chapter is to provide specific yet simple information to unpack,
install, and operate the drive. This chapter contains information on the following:
• Getting Started
• Unpacking, Inspection, and Storage
• Nameplate Information
• Identification of Parts
Getting Started
This manual will help in the installation, parameter setting, troubleshooting, and daily
maintenance of the AC drive. To guarantee safe operation of the equipment, read the
following safety guidelines before connecting the Adjustable Frequency Drive to AC
Power.
The VLT Adjustable Frequency Drive (AFD) contains dangerous voltages
when connected to line voltage. After disconnecting from the line wait at
least one minute before touching any electrical components. Also make
sure that other voltage inputs have been disconnected, such as external 24
VDC, load-sharing (linkage of DC intermediate circuit), as well as the motor
connection for kinetic back-up. Only a competent electrician should carry
out the electrical installation. Improper installation of the motor or the AFD
may cause equipment failure, serious injury or death. Follow this manual,
National Electrical Codes (NEC
®
) and local safety codes.
Electrostatic Precaution; Electrostatic discharge (ESD). Many electronic
components are sensitive to static electricity. Voltages so low that they
cannot be felt, seen or heard, can reduce the life, affect performance, or
completely destroy sensitive electronic components. When performing
service, proper ESD equipment should be used to prevent possible damage
from occurring.
It is the responsibility of the user or the person installing the AFD to provide
proper grounding, as well as motor overload and branch circuit protection
according to the National Electrical Code (NEC
®
) and local codes.
WARNING
WARNING
CAUTION
1
VLT® MICRO
Receiving, Transporting, Inspecting, and Storage
This VLT
®
MICRO Adjustable Frequency Drive has gone through rigorous quality control
tests at the factory before shipment. After receiving and before transporting the drive,
check for the following.
Receipt
After receiving the AC drive, inspect the unit to insure it was not damaged during
shipment.
Transportation
Climatic condition : Class 2K3
Inspection
• After unpacking the unit, make sure that the package includes a drive unit and the
Instruction Manual.
• Make sure that the part number indicated on the nameplate and packing carton
corresponds with the part number of your order.
Storage
The AFD should be kept in the shipping carton before installation. In order to retain the
warranty coverage, the drive should be stored properly. Some storage
recommendations are:
• Store in a clean, dry place
• Store within an ambient temperature range of -20°C to +65°C
• If possible, store in an air-conditioned evironment where the relative humidity is less
than 95%, non-condensing.
• Do not store the unit in places where it could be exposed to corrosive gases.
• Do not store the unit on an unstable surface where it could be damaged by falling to
the floor.
Nameplate Information
Example for 1HP 240V AC Adjustable Frequency Drives
Description of Serial Number
1234 01 H 260
Production date:
week, year
Place of production
Series number
Serial number
MODEL : 176F7304 S. N. 123401H260
INPUT : 3PH 200-240V 50/60 Hz 6.3A
OUTPUT : 3PH 0-240V 5.0A 1.9KVA 1HP
Freq. Range: 0.1-400Hz
Model, Serial Number
Input Spec.
Output Spec.
Freq. Range
Tracking number
Part Numbers:
1/2HP 230V single phase 176F7300
1HP 230V single phase 176F7301
2HP 230V single phase 176F7302
1/2HP 230V three phase 176F7303
1HP 230V three phase 176F7304
2HP 230V three phase 176F7305
1/2HP 230V single phase CE 176F7306
1HP 230V single phase CE 176F7307
2HP 230V single phase CE 176F7308
2
VLT® MICRO
General Technical Data
AC line supply (L1, L2, L3):
Supply voltage 200-240 V units ............................ 1 x 200/208/220/230/240 V ±10%
Supply voltage 200-240 V units ............................ 3 x 200/208/220/230/240 V ±10%
Supply frequency .......................................................................................... 50/60 Hz
Max. imbalance of supply voltage .................................... ±2% of rated supply voltage
Power factor/cos ϕ ............................................................................0.90/1.0 at rated load
Max short circuit rating ..................................................................................... 5000 A
VLT output data (U, V, W):
Output voltage ..................................................................... 0-100% of supply voltage
Output frequency..................................................................................... 0.1 - 400 Hz
Rated motor voltage, 200-240 V units ................................... 200/208/220/230/240 V
Rated motor frequency ................................................................................. 50/60 Hz
Switching on output...................................................................................... Protected
Ramp times ............................................................................................. 0.1-600 sec.
Torque characteristics:
Starting torque.................................................................................... 150% for 1 min.
Acceleration torque ............................................................................................ 100%
Overload torque, 200-240 V ............................................................... 150% for 1 min.
Control card, digital inputs:
Number of programmable digital inputs ..................................................................... 6
Terminal nos. ....................................................................... M0, M1, M2, M3, M4, M5
3
VLT® MICRO
Control card, analog inputs:
No. of programmable analog inputs (selectable voltage or current) ............................ 1
Terminal numbers ................................................................................................. AV 1
Voltage level .............................................................................................. 0 - 10 VDC
Input resistance, R
i
..........................................................................................................................................
approx. 47 kΩ
Current range ................................................................................................ 4-20 mA
Input resistance, R
i
..........................................................................................................................................
approx. 250 Ω
Resolution ................................................................................................ 10 bit + sign
Galvanic isolation: All analog inputs are galvanically isolated from the supply voltage.
Control card, 10 VDC supply:
Terminal numbers ................................................................................................ +10V
Max. load .......................................................................................................... 10 mA
Control card, analog outputs:
Number of programmable analog outputs ................................................................. 1
Terminal numbers ................................................................................................. AFM
Voltage range at analog output .................................................................. 0 - 10 VDC
Galvanic isolation: All analog outputs are galvanically isolated from the supply voltage.
PHC output
Number of programmable photocoupler outputs ....................................................... 1
Terminal numbers ...................................................................................... MO1-MCM
Max. output ...................................................................................... -48 VDC, 50 mA
Control card, RS485 serial communication:
Terminal numbers .............................................................................................. RJ-11
4
VLT® MICRO
5
Relay outputs:
No. of programmable relay outputs ........................................................................... 1
Terminal numbers .............................................. RA, RC (N.O.) RB, RC (N.C.) (Form C)
Max. terminal load rating ...........................................................120 VAC/28 VDC, 5 A
........................................................................................................... 240 VAC, 2.5 A
Brake resistor terminals:
Terminal numbers ............................................................................................. B1, B2
Cable lengths and cross-sections:
Use 75°C copper wire minimum
Max. motor cable length ...................................................................................... 50 m
Max. cable cross-section for line, motor and brake ......................... 14 AWG (2.0 mm
2
)
Max. cable cross-section for control terminals ................................ 14 AWG (2.0 mm
2
)
Control characteristics:
Frequency range ..................................................................................... 0.1 - 400 Hz
Resolution on output frequency .......................................................................±0.1 Hz
Speed, control range (open loop) ............................................. 1:20 of synchro. speed
Speed, accuracy (open loop) .............................................< 1800 rpm: max. error 2%
......................................................... > 1800 rpm: max. error of 0.5% of actual speed
Environment:
Enclosure .............................................................................. Protected chassis (IP20)
Vibration test ...................................................... 1.0 g less than 20Hz, 0.6 g 20-50Hz
Max. relative humidity ................................................ less than 90% (non-condensing)
Ambient temperature ............................................................................ –10°C - +50°C
Temperature during storage/transport ....................................................... –20 - +60°C
Max. altitude above sea level ............................................................ 3300 ft. (1000 m)
VLT® MICRO
6
AC Line 1Ø and 3Ø, 200 - 240 Volt
VLVL
VLVL
VL
T OrT Or
T OrT Or
T Or
der Number 1Øder Number 1Ø
der Number 1Øder Number 1Ø
der Number 1Ø
176F7300176F7300
176F7300176F7300
176F7300
176F7301176F7301
176F7301176F7301
176F7301
176F7302176F7302
176F7302176F7302
176F7302
3Ø3Ø
3Ø3Ø
3Ø
176F7303176F7303
176F7303176F7303
176F7303
176F7304176F7304
176F7304176F7304
176F7304
176F7305176F7305
176F7305176F7305
176F7305
1Ø CE1Ø CE
1Ø CE1Ø CE
1Ø CE
176F7306176F7306
176F7306176F7306
176F7306
176F7307176F7307
176F7307176F7307
176F7307
176F7308176F7308
176F7308176F7308
176F7308
Output current
continuous (200-240) [A] 2.5 5.0 7.0
intermittent (200-240) [A] 3.7 7.5 10.5
Output
continuous (200-240) [KVA] 1.0 1.9 2.7
Typical shaft output [HP] 0.5 1.0 2.0
[kW] 0.4 0.75 1.5
Max. motor cable size [AWG] 14 14 14
[mm
2
]222
Max. input current 1Ø, 200-240 [A] 6.3 11.5 15.7
3Ø, 200-240 [A] 2.9 6.3 8.8
Max. power cable size [AWG] 14 14 14
[mm
2
]222
Max. pre-fuses
1)
1Ø [A] 10 20 25
3Ø [A] 10 20 25
Enclosure Chassis (IP20)
Weight 1Ø [lbs.] 1.75 2.0 2.25
3Ø [lbs.] 1.75 1.75 2.0
1)
200-240 VAC; Bussmann type JJN or exact equivalent
Specifications
VLT® MICRO
1: Mounting screw holes
2: Nameplate label
3: Bottom cover
4: Digital keypad
5: Upper cover
6: Ventilation hole
7: Input terminals
8: External input/output
terminals
9: B1, B2 External brake
resistor terminals
10: U, V, W Output terminals
7
7
8
9
10
U V W B1 B2
R S T
5
4
3
6
1
2
VLT® MICRO
Air
Flow
5 in.
(120mm)
min.
5 in.
(120mm)
min.
2 in.
(50mm)
min.
2 in.
(50mm)
min.
Chapter 2
Installation and Wiring
Chapter 2 provides the information needed to properly install and wire the AC motor
drive. Make sure that the AC drive is wired according to the instructions contained in
this chapter. The instructions should be read and understood before the actual
installation begins. This chapter contains the following information:
• Installation Requirements
• Wiring
Installation Requirements
Install the drive vertically to provide proper ventilation. Adequate space is required
between the drive and a wall or other equipment. The figure below shows the minimum
space needed.
The AC motor drive should be installed in an environment that is:
• protected from rain or moisture
• protected from direct sunlight
• protected from corrosive gases or liquids
• free from airborne dust or metallic particles
• free from vibration
• free from magnetic noise
• Climate condition : Class 3K3 (temperature between -10°C to 50°C, Operation
above 40°C requires good ventilation to avoid over-heating.)
6 in
(150mm)
min.
6 in
(150mm)
min.
8
VLT® MICRO
Wiring
There are two wiring systems in an AFD: Main Circuit and Control Circuit. The Main
Circuit terminals are located at the top of the drive. Control Circuit terminals are located
bottom of drive, Both terminal blocks are covered by the plastic housing. Lift the
hinged portion of the housing to gain access to the terminals. Make sure power is
removed before making any connections. Connect wires to the terminals according to
the diagram below. When no connections are made to the control terminals, the drive is
operated by the Digital Keypad/Display.
9
Braking Resistor (Option)
Select 80 ohm 120V
/200 ohm 120V
R
S
T
VAC Input
(Select two
terminals as
input for 230V
single phase
models)
Factory set as
multi-function input terminals
Forward/Stop
Reverse/Stop
Reset
Multi-Step 1
Multi-Step 2
Multi-Step 3
Signal Common
M0
M1
M2
M3
M4
M5
GND
M
Grounding
Trim (1K ohm)
Analog +
output
DC 0-10V –
Factory set as,
Indication of output frequency
Multi-function indication output
contacts 120VAC/28VDC 5A
240VAC 2.5A
Factory set as,
Indication of fault
RA
RB
RC
Multi-function PHC output
48V 50mA below
Factory set as,
Indication of "At work"
MO1
MCM
Power for
speed setting
+10V 10mA (max)
AV1
GND
Output Freq. determined
Analog voltage
0-10VDC
VR: 3K-5K ohm
Analog current
4-20mA
Factory set as, output frequency
determined by the potentiometer on
the control panel
R
S
T
E
U
V
W
F
AFm
GND
Ground
Control Circuit Terminals
Main Circuit (power) Terminals
RJ-11 communication port with
RS-485 serial interface
2: GND
3: SG–
4: SG+
5: +5V
6
* NOTE: Do not plug a modem or telephone in to the RS485 port. Do not use terminals
2 or 5 when using the port.
VLT® MICRO
Recommended Input Fuses
BUSSMAN Type JJN
Fuse
VLT MICRO model176F7300 JJN-10
VLT MICRO model176F7301 JJN-20
VLT MICRO model176F7302 JJN-25
VLT MICRO model176F7303 JJN-10
VLT MICRO model176F7304 JJN-20
VLT MICRO model176F7305 JJN-25
VLT MICRO model176F7306 JJN-10
VLT MICRO model176F7307 JJN-20
VLT MICRO model176F7308 JJN-25
10
NOTE:
1. Main-circuit terminals spec. is M3.
2. Main-circuit wiring is 600V 14AWG max.
3. Wiring between drive and motor should
not exceed 330 ft. (100m)
(1) 100 ft. (30m) below, the PWM carrier
frequency should be 15kHz below.
(2) 165 ft. (50m) below, the PWM carrier
frequency should be 10kHz below.
(3) 300 ft. (100m) below, the PWM carrier
frequency should be 5kHz below.
4. Voltage drop (V) = √3 • line resistance
(Ω.Km) • line lengfh (m) • Current (A) • 10
-3
Connection for optional brake resistor.
Refer to Appendix for model numbers.
R S T
U
V
W
B1 B2
200-240 V200-240 V
200-240 V200-240 V
200-240 V
AC unitsAC units
AC unitsAC units
AC units
VLT® MICRO
RA
M01MCM+10VAVIAFMGND
M5M4M3M2M1M0RCRB
Relay contactor output
Factory setting:
Forward / Stop
Reverse / Stop
Reset
Multi-step speed 1
Multi-step speed 2
Multi-step speed 3
Photo coupler output
Factory set: Operation
Speed: 3K-5K
Trim potentiometer
VR:1K-5K
Freq. meter
0-10VDC
Full scale voltmeter
Control Terminal Designations
AWG 12-14
Torque 4 kg-cm
Terminal symbol Terminal name Remarks
RA - RC Multi-function output contact Refer to P46,
RB - RC Multi-function output contact Relay Output Contact
M0 - GND Multi-function input 1 Refer to P38, 39, 40, 41, 42
M1 - GND Multi-function input 2
M2 - GND Multi-function input 3
M3 - GND Multi-function input 4
M4 - GND Multi-function input 5
M5 - GND Multi-function input 6
MO1 - MCM Multi-function PHC output 1 Refer to P45
+10V - GND Power supply for speed control Command for power supply
(+10 V)
AVI - GND Analog voltage freq. command 0 - 10V or 4 - 20mA
inputs (10V and 20mA = max. freq.)
AFM - GND Analog frequency/current meter 0 - 10 V output ( 10 V = max. freq.)
Note : Use twisted-shielded or twisted-pair shielded wires for the control signals. It is
recommended to run all signal wiring in a separate steel conduit. The shield wire should
only be connected to ground at the drive end of the cable.
11
VLT® MICRO
Installation Notes:
• Make sure that the appropriate input fusing with specified current ratings are
connected between the AC Power Line and the AC drive. A MCC (contactor with
magnetic trip) is recommended between the drive and circuit breaker to provide a
means to disconnect the drive from the power line in the event of a fault.
• Make sure that the leads are connected correctly and the drive is properly grounded.
(Ground leads should be at least as the same size as input terminals R, S and T.)
• Use ground leads that comply with AWG standards. Make the length of these ground
leads as short as possible.
• Should several units be installed side by side, all the units should be grounded directly
to the ground terminal. Do not form a loop with the ground leads.
Forward
running
• When the drive output terminals U, V, and W are connected to the motor terminals U,
V, and W, respectively, the motor will rotate counter-clockwise (viewed from the shaft
of the motor as shown above) when a forward operation command is received ( FWD
lamp is ON).
• Make sure that the power source supplies the correct voltage and is capable of
supplying the required current to the drive.
• When power is applied to the drive, the internal DC bus charge indicator LED will be
on.
• Do not attach or remove wiring or connectors when power is applied to the drive. Do
not attempt to probe signals on the circuit board while the drive is operating.
• For single phase applications, the AC input line can be connected to any two of the
three input terminals R, S, T. Note: The drive is not intended for use with single-phase
motors.
• To reverse the direction of rotation, interchange the connection of any of the two
motor leads.
• Do not connect the AC input to any of the U, V, W terminals, as this will damage the
drive.
12
VLT® MICRO
• Avoid loose wiring and possible shorts. Tighten all screws on AC circuit terminals
securely.
• It is a good practice to maintain a 90° angle between wires connected to the AC
circuit terminals and wires connected to the control terminals.
• Use shielded cables for Control Circuit wiring,
• Use conduit for the AC power line. The conduit on both the input and output of the
power line should be grounded.
• If an EMI filter is required, it should be located close to the drive. Reducing carrier
frequency can also be a way to reduce EMI noise, however audible noise from the
motor will increase.
• An L-Filter can be added to the U.V.W. side of AC Motor Drives if needed. Do not use
a Capacitor, or L-C Filter (Inductance-Capacitance), or R-C Filter (ResistanceCapacitance).
• A “Ground Fault Interrupt Circuit” can be used. To avoid malfunctioning of the motor
and drive, sensitivity of the current sensor should not be less than 200 mA with a
response time not less than 0.1 second.
13
VLT® MICRO
Chapter 3
Digital Keypad/Display Operation
Chapter 3 describes the various controls and indicators found on the Digital Keypad/
Display. The information in this chapter should be read and understood before
performing the start-up procedures described in Chapter 4.
• Description of the Digital Keypad/Display
• Description of Display
• Digital Keypad Operating Modes & Programming Steps
Description of the Digital Keypad/Display
Operating Modes and Functions
When delivered from the factory, the Digital Keypad/Display module is mounted on the
front panel of the AC drive. This module has two functions: display and control. The
Display shows the current status of the drive. The control function provides the
programming interface.
RUN
STOP
FWD
REV
MODE
RUN
ENTER
STOP
RESET
FREQ SET
50
100
0
LED Display
Indicates frequency, motor
parameter setting value and
alarm contents.
Program / Function Data Key
Selects normal mode / program mode.
Displays the motor drive status, such
as output freq., selects the parameters,
FWD/REV or output current, etc.
ENTER Key
Sets the different parameters
LED Indication
Lamp lights during RUN,
STOP, FWD & REV operation.
RUN Key
Starts inverter drive operation.
STOP/RESET Key
Stops and resets the parameter
after faults occur.
UP and DOWN Key
Sets the parameter number or
changes the numerical data
such as the freq. reference.
VR for Setting Freq.
Could be the main-freq. input by
setting parameter Pr.00.
14
VLT® MICRO
Function / Program
Pressing the “mode” key repetitively displays the AFD status such as the
reference frequency, output frequency, direction or output current and
selects the parameter setting mode.
Enter
Pressing the “ENTER” key to enter the data change mode and again to
store the value in memory.
Run
Used to start the AC drive operation. This key has no effect when the
drive is controlled by the External Control Terminals.
Stop / Reset
Used to stop AC drive operation. If the drive has stopped due to a fault,
clear the fault first, then press this key to reset the drive. This key has no
effect when the drive is controlled exclusively by the External Control
Terminals.
Up / Down
Press the “Up” or “Down” keys momentarily to change parameter
settings. These keys may also be used to scroll through different operating
values or parameters. Pressing the “Up” or “Down” key momentarily, will
changes the parameter settings in single-unit increments. To quickly run
through the range of settings, press down
and hold the key.
Press the "Up" or "Down" key momentarily to select Forward or Reverse
directions when in Direction Mode and the drive is controlled by the digital
control panel.
MODE
ENTER
RUN
STOP
RESET
RUN
STOP
FWD
REV
Green lamp lights during REV operation.
Green lamp lights during FWD operation.
Red lamp lights by pressing STOP.
Green lamp light by pressing RUN.
Explanation of the LED Indicators
15
VLT® MICRO
Quick Set-up
Refer to the relevant chapters of this manual for detailed instructions to configure the
VLT MICRO for your specific requirements.
Before you start, please read the safety instructions in Chapter 1 of this
manual. The adjustable frequency drive contains dangerous voltages when
connected to the AC line. Improper connection of the motor or the VLT
MICRO may cause equipment failure, serious injury or death.
Follow the directions in this Quick Set-up, as well as all local and national safety codes.
Electrical Installation, Power
Connect the AC line and motor cables as shown in Chapter 2 of this manual.
Programming
The VLT adjustable frequency drive is programmed by
means of the Digital Keypad. Refer to Chapter 3 for the
keypad functions.
In order to operate in Quick set-up the Pin Header/Jumpers
(located next to the input terminals) should be as shown.
NOTE:
Speed reference is controlled by the "Arrow" keys. If the
potentiometer is to be used as the speed reference
parameter Pr.00 will need to be programmed to d01.
Set the following parameters according to the motor
nameplate:
Max motor frequency Parameter Pr.04
Max motor voltage Parameter Pr.05
Motor rated current Parameter Pr.52
Motor Full Load Amps
Drive's Max. Cont. Amps
Set the ramp times:
Accel time Parameter Pr.10
Decel time Parameter Pr.11
Motor Start
Press the "RUN" key to start the motor. Adjust desired speed using the "Arrow" keys.
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
Pr.52 = x 100
Drive's Max Continuous Amps
Model Amps
176F7300 & 176F7303 2.5
176F7301 & 176F7304 5.0
176F7302 & 176F7305 7.0
J5
J6
J7
16
VLT® MICRO
Explanation of Displayed Messages
Displays the AC drives output frequency. The frequency may be
determined by any one of the frequency sources that is selected by
the [Master frequency setting] or [Jog Frequency] command. It may
also be set using the [Multi-step speed setting 1 - 7] as determined by
the inputs to Multi-function Input terminals 1, 2 and 3.
If the frequency source originates from the control panel, the user
can use either the "up" or "down" key to select the frequency.
Displays the output frequency present at terminals U, V, and W.
Displays the custom unit (v), where v = H x Pr.-65.
Displays the internal counter value (C).
Note : Refer to Chapter 5, Pr.-45, 46, 64 - 66 for detailed description.
Displays the custom unit (v), where v = H x Pr.-65.
Displays the custom unit (r), where r = H x Pr.-65.
Displays the custom unit (L), where L = H x Pr.-65.
Displays the custom unit (%), where % = H x Pr.-65.
Displays the counter value (c).
Displays the output current present at terminals U, V, and W
Displays the internal PLC process step currently being performed.
Displays the specified parameter.
Displays the actual value stored within the specified parameter.
AC drive forward run status.
AC drive reverse run status.
The display will read “end” (as shown in the display to the left) for
approximately 1 second if an input has been accepted. After a
parameter value has been set, the new value is automatically stored in
memory. To modify an entry, use the "up" and "down" keys.
The display will read “Err”, if as input is not accepted, or a parameter
value is selected outside the limit of the parameter.
17
VLT® MICRO
Press keys
to select the
parameter value.
Press keys
to select the
parameter number.
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
• Operating The Digital Control Panel
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
Press to set
the motor running
frequency
Note: Set parameter Pr.00 to d00 to enable setting the frequency by the keypad.
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
Press the freq.
will decrease
3.5Hz/sec.
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
Press the freq.
will increase 3.5Hz/
sec.
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
• Operate the parameter value setting.
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
Displays the
parameter
number
automatically.
Press
Key
MODE
MODE
Press
Key
MODE
Press
Key
MODE
Press
Key
MODE
Press
Key
ENTER
Press
Key
Press
Key
ENTER
Press
Key
Press
Key
Press
Key
and
hold
Press
Key
and
hold
Release
Key
• Indicate the operation mode.
Indication after
power on.
Parameter value
setting motor.
Output frequency
monitor.
Output current
monitor.
Fwd./Rev.
monitor.
Displays the frequency
setting monitor.
Parameter value
setting motor.
The setting
value monitor
Modified the Pr.
value to d01.
The setting
value is right.
Parameter
setting monitor.
"End" The new value has
been automatically
stored in the
internal
memory.
"Err" The value entered
is not correct.
Frequency value
setting monitor.
Setting the freq.
to 59.9Hz.
Decrease the freq.
to 0Hz approx 17
sec. later.
Increase the freq.
to 60Hz approx
17 sec. later.
The freq. value can
be entered in stop
or operating mode.
18
VLT® MICRO
• Change the different indication mode as follows:
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
• Reset the fault messages.
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
RUN
STOP
FWD
REV
MODE
ENTER
RUN
STOP
RESET
FREQ SET
50
100
0
Press
Key
or
MODE
Press
Key
STOP
RESET
Press
Key
Press
Key
RUN
MODE
Press
Key
MODE
Press
Key
MODE
Press
Key
After
10 sec.
twice
After
10 sec.
STOP
RESET
Press
Key
Fault message
O.H. is displayed.
Frequency setting
will be displayed
after the fault is
removed.
Change to Reverse
oprtation.
Change the Fwd.
or Rev. operation.
Setting the
frequency.
Decrease motor
speed to stop. Stop mode.
"STOP" "REV"
will light up.
"STOP" "REV" will
light "RUN" will
flash.
"STOP" "FWD"
will light up.
"RUN" "FWD"
will light up.
Indication after
power on.
Operate at
60.0Hz.
Output frequency
monitor.
Output current
monitor.
Forward
operation
monitor.
"RUN" "REV" will light
"FWD" will flash.
19
VLT® MICRO
Chapter 4
Description of Parameters
Pr.00 Master Frequency Source Select
Factory Setting d00
Units None
Settings d00 Master frequency determined by keypad digital control.
d01 Master frequency determined by analog signal of DC 0V - +10V,
a. Performed by keypad potentiometer. The pin header and jumper
combined as 1 and 3 in the diagram below.
b. Performed by external terminal AVI. The pin header and jumper
combined as 2 and 3 in the diagram below.
d02 Master frequency determined by analog signal of DC 4mA - 20mA.
Performed by external terminal AVI. The pin header and jumper
combined as 2 and 4 in the diagram below.
Pin Header/Jumper Diagrams:
The pin headers and jumpers are located on the upper right corner of the control board
and can be accessed by opening the input terminal cover.
J5: Selects the source of the potentiometer input from
the External Control Terminal (AVI) or from the
Digital Keypad/Display (LC-03P) potentiometer.
J6, J7: This jumper is used to select the DC voltage signal
or DC current signal for master frequency control.
J5 J6 J7
1
2
3
12
34
J5
J5
J6 J7
J6 J7
1
2
3
1
2
3
1
2
3
1
2
3
External terminal
AV1 effective
Analog current
signal selection
Keypad
VR effective
Analog voltage
signal selection
20
VLT® MICRO
Pr.01 Operation Command Source Select
Factory Setting d00
Units None
Settings d00 Operating instructions determined by the Digital Keypad/Display.
d01 Operating instructions determined by the External Control Terminals.
Keypad STOP key is effective.
d02 Operating instructions determined by the External Control Terminals.
Keypad STOP key is not effective.
(Refer to parameters 38, 39, 40, 41 and 42 for more details.)
Pr.02 Motor Stop Method Select
Factory Setting d00
Units None
Settings d00 Ramp stop
d01 Coast to stop
This parameter determines how the motor is stopped when the AC drive receives a valid
stop command.
Ramp: The AC drive output frequency decelerates down to the minimum output
frequency (Pr.08) in the time specified by Pr.11 or Pr.13, then the output is turned off.
Coast: The AC drive output is turned off immediately and the motor free runs until it
comes to a stop.
Ramp Coast
To determine the best method to stop the motor, the type of load needs to be
considered.
1. In many applications operator safety and material processing can be improved when
"Ramp Stop" is selected. The accel./decel. time required will depend on the specific
parameters of your application.
2. The advantage of using "Coast-to-stop" is the motor will heat less during
frequent starting and stopping. Applications where "Coast-to-stop" is commonly
used are fans, pumps, blowers, mixing and agitating.
Frequency command
sec. sec.
Speed
Stop command Setting value Stop command ?
Speed (Free running to stop)
Frequency command
Hz
Hz
21
VLT® MICRO
Pr.03, Pr.04, Pr.05, Pr.06, Pr.07, Pr.08, Pr.09 – V / F Curve
Pr.03 Maximum Output Frequency
Factory Setting d60.0 Hz
Units 0.1 Hz
Parameter value d50.0 - d400.0 Hz
This parameter determines the maximum AC drive output frequency. Analog inputs (0 10 V, 4 - 20 mA) are scaled to correspond to the output frequency range.
Pr.04 Motor Frequency
Factory Setting d60.0 Hz
Units 0.1 Hz
Parameter value d10.0 - d400.0 Hz
This value should be set according to rated frequency of the motor as indicated on the
motor nameplate.
Pr.05 Motor Voltage
Factory Setting d220.0
Units 0.1 V
Parameter value d2.0 - d255.0
This parameter determines the Maximum Output Voltage of the AC drive. The maximum
output voltage setting must be smaller than or equal to the rated voltage of the motor as
indicated on the motor nameplate.
Pr.06 Mid-point Frequency
Factory Setting d1.50 Hz
Units 0.1 Hz
Parameter value d0.1 - d400.0 Hz
This parameter sets the Midpoint Frequency of the V/F curve. It may be used to
determine the V/F ratio between the Minimum Frequency and the Mid-point Frequency.
Pr.07 Mid-point Voltage
Factory Setting d12.0 V
Units 0.1 V
Parameter value d2.0 - d255.0
This parameter sets the Midpoint Voltage of the V/F curve. It may be used to determine
the V/F ratio between the Minimum Voltage and the Mid-point Voltage.
22
VLT® MICRO
Pr.08 Minimum Output Frequency
Factory Setting d1.50 Hz
Units 0.1 Hz
Parameter value d0.1 - d20.0 Hz
This parameter programs the Minimum Output Frequency of the AC drive.
Pr.09 Minimum Output Voltage
Factory Setting d12.0 V
Units 0.1 V
Parameter value d2.0 - d50.0 V
This parameter programs the Minimum Output Voltage of the AC drive.
Voltage
Pr.05
Pr.07
Pr.09
Pr.08 Pr.06
Pr.04
Pr.03
Frequency
Fan/Pump V/F Curve
Custom V/F Curve
Frequency
Pr.03Pr.04
Pr.06
Pr.08
Pr.05
Pr.07
Pr.09
Voltage
Voltage
Pr.05
Pr.07
Pr.09
Pr.06
Pr.08
Pr.03
Pr.04
Frequency
Standard V/F Curve
0
23
VLT® MICRO
Pr.10, Pr.11, Pr.12, Pr.13 Acceleration / Deceleration Time
Pr.10 Acceleration Time 1 (Can be programmed while the drive is running.)
Factory Setting d10.0 Sec
Units 0.1 Sec
Parameter value d0.1 - d600.0 Sec
Commonly Used V/F Pattern Settings
(1) General Purpose
(2) Fans and Pumps
(3) High Starting Torque
Motor Spec 50Hz
Motor Spec 50Hz
Motor Spec 50Hz
Motor Spec 60Hz
Motor Spec 60Hz
Motor Spec 60Hz
No. Set value
Pr.03 50.0
Pr.04 50.0
Pr.05 220.0
Pr.06 1.3
Pr.07 12.0
Pr.08 1.3
Pr.09 12.0
No. Set value
Pr.03 60.0
Pr.04 60.0
Pr.05 220.0
Pr.06 3.0
Pr.07 23
Pr.08 1.5
Pr.09 18.0
No. Set value
Pr.03 50.0
Pr.04 50.0
Pr.05 220.0
Pr.06 25
Pr.07 50.0
Pr.08 1.3
Pr.09 10.0
No. Set value
Pr.03 50.0
Pr.04 50.0
Pr.05 220.0
Pr.06 2.2
Pr.07 23.0
Pr.08 1.3
Pr.09 14
Factory Settings
No. Set value
Pr.03 60.0
Pr.04 60.0
Pr.05 220.0
Pr.06 1.5
Pr.07 10.0
Pr.08 1.5
Pr.09 10.0
No. Set value
Pr.03 60.0
Pr.04 60.0
Pr.05 220.0
Pr.06 30
Pr.07 50.0
Pr.08 1.5
Pr.09 10.0
V
220
23
14
1.3 2.2 60.0
f
1.3 25 50.0
f
1.5 30 60.0
f
1.5 50.0
f
1.5 60.0
f
1.5 3 60.0
f
V
220
50
10
V
220
10
V
220
10
V
220
23
10
V
220
50
10
24
VLT® MICRO
This parameter is used to determine the time required for the AC drive to ramp from 0
Hz to its Maximum Output Frequency (Pr.03). The rate is linear unless S Curve is
"enabled". This rate of acceleration applies to any incremental increase in command
frequency unless selected using the Multi-Function Inputs, MI1 - 3. See Parameters 39,
40 and 41. Acceleration time 1 is the default when a Multi-Function Input Terminal has
not been programmed to select between Acceleration time 1 and Acceleration time 2.
Pr.11 Deceleration Time 1 (Can be programmed while the drive is running.)
Factory Setting d10.0 Sec
Units 0.1 Sec
Parameter value d0.1 - d600.0 Sec
This parameter is used to determine the time required for the AC drive to decelerate
from the Maximum Output Frequency (Pr.03) down to 0 Hz. The rate is linear unless S
Curve is "enabled". Deceleration time 1 is the default when a Multi-Function Input
Terminal has not been programmed to select between Deceleration time 1 and
Deceleration time 2.
Note: See Pr.101; Automatic Accel and Decel times are default. Change to "Linear
Acceleration/Deceleration" to enable manual adjustment.
Pr.12 Acceleration Time 2 (Can be programmed while the drive is running.)
Factory Setting d10.0 Sec
Units 0.1 Sec
Parameter value d0.1 - d600.0 Sec
This parameter determines the time required for the AC drive to ramp from 0 Hz to the
Maximum Operating Frequency (Pr.03). The rate is linear unless S Curve is "enabled".
The rate of acceleration applies to any incremental increase in command frequency
unless Acceleration Time 1 (Pr.10) is selected. Acceleration Time 1 and 2 may be
selected using the Multi-Function Inputs M1 - 3. (See Parameters 39, 40 and 41.)
Speed
Time
Decel
Time
Accel
Time
Frequency command
Pr.10 or Pr.12
Pr.11 or Pr.13
25
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