Hitachi WJ200 Series Software User manual

Page 1
HITACHI WJ BASIC INSTRUCTION MANUAL
DH PROGRAM #27
Detroit Hoist & Crane LLC, Co.
6650 Sterling Drive North, Sterling Height Michigan 48312
[phone]

Page 2
Stop Read First!
Important! – This manual is for program number #27 from Detroit Hoist. Please verify the program number before using this manual
by navigating to VFD parameter d024. To navigate to d024 and check your VFD’s program number follow the steps chart below.
Step
Instruction
1 Power up the VFD.
2 Press the ESC button on the display one time and the screen will change to d001.
3 Use the UP arrow button to navigate to d024.
4 Press the SET button to view the value of d024.
5
To return to the main screen press and hold the ESC button until the display returns to 0.00 or you can simply cycle
power.

Page 3
Contents
BASIC SPECIFICATIONS ..........................................................................................................................................................................4
POWER CIRCUIT WIRING ....................................................................................................................................................................... 5
CONTROL CIRCUIT WIRING....................................................................................................................................................................6
CONFIGURING SPEED CONTROL METHOD ............................................................................................................................................7
CONFIGURING SPEEDS / FREQUENCIES.................................................................................................................................................8
ACCELERATION / DECELERATION TIMES ...............................................................................................................................................9
ALTERNATE ACCELERATION / DECELERATION TIMES............................................................................................................................ 9
MICRO-SPEED FUNCTION ....................................................................................................................................................................10
LIMIT TO 1ST SPEED FUNCTION ............................................................................................................................................................10
AUTO-SPEED 90HZ FUNCTION.............................................................................................................................................................11
SETTING THE AUTO-SPEED ACTIVATION VALUE..................................................................................................................................11
125% FIELD LOAD TESTING / OVER-WEIGHT BYPASS..........................................................................................................................12
HOIST OVER-WEIGHT FUNCTION ........................................................................................................................................................ 13
HOIST OVER-WEIGHT PARAMETERS....................................................................................................................................................13
SETTING HOIST OVER-WEIGHT ............................................................................................................................................................14
CARRIER FREQUENCY .......................................................................................................................................................................... 15
AUTOMATIC CARRIER FREQUENCY REDUCTION .................................................................................................................................15
RESET FAULT USING INPUT..................................................................................................................................................................16
OUTPUT SIGNAL WHEN FAULT OCCURS..............................................................................................................................................16
ELECTRONIC MOTOR THERMAL PROTECTION.....................................................................................................................................16
MOTOR BRAKE PARAMETERS..............................................................................................................................................................17
VFD CONTROL MODES......................................................................................................................................................................... 17
CONSTANT TORQUE CONTROL MODE / MANUAL TORQUE BOOST ...................................................................................................18
CONSTANT TORQUE CONTROL MODE / AUTOMATIC TORQUE BOOST ..............................................................................................19
FINE TUNING AUTOMATIC TORQUE BOOST........................................................................................................................................19
SENSORLESS VECTOR CONTROL MODE............................................................................................................................................... 20
FINE TUNING SENSORLESS VECTOR..................................................................................................................................................... 21
AUTO-TUNING .....................................................................................................................................................................................22
REDUCED LOAD SWING .......................................................................................................................................................................23
TANDEM HOIST / TROLLEY EZCOM (SPEED / COMMAND SYNCING) ..................................................................................................24
EZCOM SETUP GUIDE ..........................................................................................................................................................................25
EZCOM PARAMETERS ..........................................................................................................................................................................25
EZCOM CIRCUIT WIRING......................................................................................................................................................................26
VIEW FAULT HISTORY .......................................................................................................................................................................... 27
CLEARING FAULT HISTORY................................................................................................................................................................... 28
FAULT / ERROR CODES DESCRIPTION.................................................................................................................................................. 29

Page 4
BASIC SPECIFICATIONS
For specifications that are not listed please contact Detroit Hoist for further information.
•Input power 3-phase 50/60hz (recommended).
•Single phase applica�ons must derate VFD to 70% and may require a larger VFD to supply the required motor current.
Please contact Detroit Hoist for further informa�on on single phase applica�ons.
•380-480Vac (400v class models WJ-*****-HF).
•208-240Vac (200v class models WJ-*****-LF).
•Digital I/O’s are 24vdc (27vdc max).
•Voltage fluctua�on must be -15% to +10% or less.
•Voltage imbalance must be ±3% or less.
•Frequency varia�on must be ±4% or less.
•Total harmonic distor�on (THD) of voltage must be ±10% or less.
•Ambient temperature -10 to 50℃| 14 to 122 °f.
•In case of u�liza�on at an al�tude of 1000m or more, consider that the atmospheric pressure is reduced by 1% for every
100m up. Apply 1% dera�ng from the rated current by increasing every 100m and conduct an evalua�on test.
•IP20 – UL Open Type.
•Overload Current Ra�ng 150% 60sec / 200% 3sec.
•All Digital I/O is 24vdc.
•Suitable for use on a circuit capable of delivering not more than 5,000 rms symmetrical amperes.
•Integral solid state short circuit protec�on does not provide branch circuit protec�on. Branch circuit protec�on must be
provided in accordance with the Na�onal Electrical Code and any addi�onal local codes.
•Pollu�on degree 2 environment and Overvoltage category III.
•Built-in dynamic braking chopper circuit.

Page 5
Risk of electric shock!
•Before inspecting the inverter,
be sure to turn off
the power supply and wait for more than 10 or 15
minutes depending on the invertor model*1
.
(Before inspection, confirm that the Charge lamp on
the inverter is off and the DC bus voltage between
terminals P and N is 45 V or less.)
Risk of electric shock!
•Before inspecting the inverter,
be sure to turn off
the
power supply and wait for more than 10 or 15
minutes depending on the invertor model*1
.
(Before inspection, confirm that the Charge lamp on
the inverter is off and the DC bus voltage between
terminals P and N is 45 V or less.)
POWER CIRCUIT WIRING
Terminal Symbol
Basic Description
Extended Description
R, S, T
(L1, L2, L3)
Main power input (3-ph 50/60hz)
Connect to the AC power supply. Leave these terminals
unconnected when using a front end regenerative converter.
U, V, W
(T1, T2, T3)
Inverter motor output Connect three-phase motor or load reactor.
PD, P
( +1, + )
DC link choke connection terminal
Remove the PD-P jumper from terminals, and connect the
optional DC link choke for power factor improvement.
P, N
(+, - )
DC bus positive and negative terminals.
Connection of a back end regenerative converter or external
braking unit.
P, RB
( +, RB )
Dynamic braking chopper circuit Connect braking resistor.

Page 6
CONTROL CIRCUIT WIRING
Below is a basic example of the control circuit for the Hitachi WJ with the DH firmware and may differ from the actual configuration
please reference the provided electrical drawing. Please consult Detroit Hoist if you plan to make changes to the control circuit for
specific functions to ensure compatibility with the DH firmware. Please note that not all functions provided by standard Hitachi
manual are compatible with the DH firmware and the use of them may cause the VFD to become unusable or unsafe.
Terminal Symbol
Description
P24
Internal 24V power supply.
1 - 7
24v digital inputs for command functions. 5.6mA
Terminal 4, 6, 7 can be configured for allowed functions.
CM2
COM for 24v digital outputs 11 & 12
11 & 12
24v digital outputs. 60mA max
AL0 (COM), AL1 (N.O), AL2 (N.C)
( not configurable )
Brake release relay SPDT | 250vac 5A(resistive) \ 250vac 1A(inductive)
L
0v / ground reference for all analog I/O’s
O
Analog input 0-10V
OI
Analog input 4-20mA
H
Internal 10v reference.
SN, SP
RS485 / Ezcom communication terminals. Used for Modbus or Ezcom
communication. Shielded twisted wire required and grounding of shield.
L / PLC 0V reference for internal 24V power supply and ground reference for I/O return.

Page 7
CONFIGURING SPEED CONTROL METHOD
Detroit Hoist VFD controls come factory pre-configured for 2-Step speed control unless otherwise specified during the ordering
process.
Use the chart below to configure the speed control method that is required.
Speed Control Method
Parameters
Values
2-Step P108 0
2-Step Infinitely Variable P108 1
3-Step
P108 2
P113 1
C006 61
3-Step Infinitely Variable
*Note - 3-step infinitely variable
uses the 2nd step as a frequency
hold.
P108 3
P113 1
C006 61
0-10V Analog P108 4
4-20mA P108 5

Page 8
CONFIGURING SPEEDS / FREQUENCIES
Speed / frequency values are stored as whole numbers (example is 15.25 Hz = 1525).
Use the chart below to configure the speeds / frequencies for the configured speed control method.
If operating at frequencies below or at 5hz for an extended amount of time an external motor cooling device may be required to
prevent motor overheating.
Speed Control Method
Speeds
Speed Parameters
Example Values
2-Step
(factory default)
1st speed / low speed P101 1000 (10.00 Hz)
2nd speed / high speed P102 6000 (60.00 Hz)
2-Step Infinitely Variable
1st speed / low speed P101 1000 (10.00 Hz)
2nd speed / high speed P102 6000 (60.00 Hz)
3-Step
1st speed / low speed P101 1000 (10.00 Hz)
2nd speed P102 3500 (35.00 Hz)
3rd speed / high speed P103 6000 (60.00 Hz)
3-Step Infinitely Variable
1st speed / low speed P101 1000 (10.00 Hz)
n/a n/a n/a
3rd speed / high speed P103 6000 (60.00 Hz)
0-10V / 4-20mA
1st speed / low speed P101 1000 (10.00 Hz)
2nd speed / high speed P102 6000 (60.00 Hz)
Auto-Speed Auto-Speed P104 9000 (90.00 Hz)

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ACCELERATION / DECELERATION TIMES
Changing the acceleration time to a shorter time can cause a E01, E02, or E03 over-current and or E05 over-load fault /trip, if this
occurs due to a short acceleration time increase the acceleration time and test again.
Changing the deceleration time to a shorter time can cause a E07 over-voltage fault/trip, if this occurs due to a short deceleration
time increase the deceleration time and test again.
Use the chart below to configure the standard acceleration and deceleration times.
Function
Parameters
Example Value
Acceleration Time F002 2.50 seconds
Deceleration Time F003 1.00 seconds
Acceleration Curve A097
00 = liner-curve
01 = S-curve (default)
02 = U-curve
03 = Inverse U-curve
Deceleration Curve A098
00 = liner-curve
01 = S-curve (default)
02 = U-curve
03 = Inverse U-curve
ALTERNATE ACCELERATION / DECELERATION TIMES
The alternate acceleration and deceleration function can be used to switch from the standard acceleration and deceleration times to
an alternate acceleration and deceleration time based on a digital input, frequency break point, or reversal of direction command
(aka reverse plugging). If you plan to use switch by input [2CH] you will need to configure an available digital input function
for 09:[2CH] (example C006 = 09) and add the 24v circuit for that input.
Use the chart below to configure the standard acceleration and deceleration times.
Function
Parameters
Example Value
ALT Acceleration Time A092 2.50 seconds
ALT Deceleration Time A093 1.00 seconds
Method to switch to
ALT Accel / Decel A094
00 = Switching by input [2CH]
(configure available digital input function to 09: 2CH)
01 = Switching by frequency break point
02 = Switching by direction reversal
Accel to ALT Accel break point A095 15.00 Hz
Decel to ALT Decel break point A096 15.00 Hz

Page 10
MICRO-SPEED FUNCTION
Micro-speed is designed to temporarily restrict the speed of the hoist to a lower speed and to prevent high speed operations until
the function is released. The micro-speed function can be configured two ways.
2-STEP MAINTAINED MODE – This mode will switch to a 2-Step maintained speed set. This is helpful where the micro-speeds need
to be specific. This mode can also be used to provide a single speed by setting the low and high micro speed values the same value.
To use this mode P106 must have a value of 0.
PERCENTAGE MODE – This mode will take the value from P106 as a percentage of the standard speed set. Setting P106 to a value of
50 will provide a 50% reduction in speed to the standard speed sets for the configured speed control method.
In the chart below the digital input 4 is configured from the factory for micro-speed.
Function
Parameters
Value
Digital Input 4 Mirco-Speed Activation
Input
C004 59:MI4
Mirco-Speed Low-Speed P100 500 (5.00 Hz)
Mirco-Speed High-Speed P105 1000 (10.00 Hz)
Micro-Speed Mode P106
Value = 0 ( 2-STEP MAINTAINED )
Value > 0 ( PERCENTAGE MODE )
LIMIT TO 1ST SPEED FUNCTION
For applications where it is required to limit the VFD to 1st speed frequency you can configure an available digital input for that
function. This is typically used for travel limits or when approaching an upper / lower hook limit. The parameter chart below
references setting either digital input 6 or digital input 7.
Function
Parameter
Value
Input 6 Configuration P113 2
Digital Input 6 Function C006 61
Digital Input 6 Contact Status C016
00 = N.O
01 = N.C
Input 7 Configuration P114 2
Digital Input 7 Function C007 62
Digital Input 7 Contact Status C017
00 = N.O
01 = N.C

Page 11
AUTO-SPEED 90HZ FUNCTION
The auto-speed function will allow the VFD to increase the high speed to up to 90Hz when there is an empty hook or a light load.
You can set this function for automatic or for input activation. The auto-speed function is not available when using 0-10V/4-20mA
speed control methods, when micro-speed is active, and or when in tandem mode.
HOW IT WORKS – When the hoist is commanded in the forward/up direction and the frequency reaches the set high speed
frequency, the VFD will check to see if the load monitor value is less than the auto-speed activation value and allow the frequency to
increase to the auto-speed frequency.
Use the charts below to properly configure the auto-speed function. If you don’t want Auto-Speed to activate unless there is an
input, you can configure digital input 6 or digital input 7 for the Auto-Speed enable command.
Function
Parameter
Example Value
Auto-Speed Activation Value P111 50
Auto-Speed Activation Method P110
0 = Automatic
1 = With Input Enable
Auto-Speed Frequency P104 9000 (90.00 Hz)
Input 6 Configuration P113 3
Digital Input 6 Function C006 61
Digital Input 6 Contact Status C016
00 = N.O
01 = N.C
Input 7 Configuration P114 3
Digital Input 7 Function C007 62
Digital Input 7 Contact Status C017
00 = N.O
01 = N.C
SETTING THE AUTO-SPEED ACTIVATION VALUE
Step
Instruction
1
Attached 30% rated load to the hook block and lift the load just off the ground.
*NOTE – 30% should be the max load for 90 Hz & 60% should be the max load for 75 Hz
2
Navigate to VFD parameter d027. This will display the load value that will be used to set the auto-speed activation
level.
3 Using the pushbutton or radio, command the hoist in the up/forward direction with high speed and record the value
of VFD parameter d027 while the load is operating at the high-speed frequency.
4 Navigate to VFD parameter P111 and set the value to the value recorded from d027 + 3%.
(example d027 = 37, set P111 = 40)
5
Verify the auto-speed function works by lifting the same load at high speed. If the auto-speed function is configured
for automatic then you should see the speed increase to 90hz, if you are using the input activation function then
make sure the input is active and you should see the speed increase to 90hz

Page 12
125% FIELD LOAD TESTING / OVER-WEIGHT BYPASS
Each hoist is factory load tested prior to shipment. If a field load test is required, you will need to bypass the over-weight signal.
To bypass the over-weight signal, locate the bypass terminal knife disconnect it should be labeled “BPS” (use images below as
reference) and pull the yellow/orange tab to open.
IMPORTANT - Be sure to close the over-weight bypass terminal knife disconnect “BPS” after the load test is complete, failure to do
so may result in damage to the hoist in the case of an overload.
NOTE – Detroit Hoist recommends that 125% load tests should only be conducted by operating the hoist in low speed when the
125% load is suspended or the VFD may fault.

Page 13
HOIST OVER-WEIGHT FUNCTION
The VFD is setup to use the output current to the motor as the over-weight function. The VFD uses (2) over-weight current
parameters. Over-weight (1) is when operating less than or equal to the low-speed frequency and over-weight (2) is when operating
above low-speed frequency. The VFD automatically switches between over-weight (1) and over-weight (2) based on the frequency.
Having (2) over-weights greatly increases over-weight accuracy and decreases the likelihood of a false over-weight condition.
The VFD has (3) configurations for the over-weight signal, external momentary, external maintained, Internal.
External momentary - will output a signal when the condition is met but will not maintain the output after the condition is no longer
met. This configuration also uses digital output 12 assigned to 52:Reverse DIR with a N.C contact status which is used to latch a relay.
External maintained - will output a signal when the condition is met and maintain the signal until the reset condition is met or power is
cycled.
Internal - does not require any external circuits to function. Internal works the same way as the external maintained but will internally
prevent the hoist up function until the reset condition is met or power is cycled.
HOW IT WORKS – When the output current to the motor exceeds the value in the conditional over-weight current parameter for an
amount of time that exceeds the detection delay time, the conditional digital output will turn on and activate a 24v relay to interrupt
the hoist E-Stop circuit. The signal is turn off once the hoist has lowered for 2.0 seconds.
HOIST OVER-WEIGHT PARAMETERS
Function
Parameters
Example Value
Over-Weight Signal Output Type
P122
0 = External Momentary
1 = External Maintained
2 = Internal
Over-Weight Detection Delay Time
P123 180 = (1.80 seconds)
Over-Weight Reset Time
P124 200 = (2.0 seconds)
Standard Over-Weight
Standard Over-Weight (1) Value *Low Speed
C041 14.0 Amps
Standard Over-Weight (2) Value *High Speed
C111 15.0 Amps
Digital Output 11 Function
C021 44:MO1
Digital Output 11 Status
C031 00: N.O
Digital Output 12 Function
C022 52:Reverse Dir
Digital Output 12 Status
C032 01: N.C
Digital Output 12 On Delay
C132 2.0 s

Page 14
SETTING HOIST OVER-WEIGHT
Each hoist’s over-weight settings will be set at the factory prior to shipment. In some cases, field adjustments may be required. Use
the step chart below to set the hoist’s over-weight settings.
Step
Instruction
1 Locate the terminal knife disconnect labeled “BPS” and pull the top of the yellow/orange tab outwards, this will
bypass the over-weight circuit.
2 Attach the 100% rated load to the hook block.
3 On the VFD navigate to the output current monitor d002 by pressing the ESC button once and using the UP button to
navigate to d002 and press the SET button to view the current monitor.
4 Proceed to lift the 100% rated load off the ground in low speed. Monitor the output current to the motor and write
it down. Be sure to wait for the output current to normalize
5 Proceed to lift the 100% rated load off the ground in high speed. Monitor the output current to the motor and write
it down. Be sure to wait for the output current to normalize.
6 Take the value from step 4 and multiply it by 1.05 and set over-weight (1) parameter C041 to that value.
7 Take the value from step 5 and multiply it by 1.05 and set over-weight (2) parameter C111 to that value.
8 Locate the terminal knife disconnect labeled “BPS” and close the tab.
9
Operate the hoist in low and high speed with the 100% rated load.
If the over-weight circuit trips in low speed, then increase the value of over-weight (1) parameter until it no longer
trips.
If the over-weight circuit trips in high speed, then increase the value of over-weight (2) parameter until it no longer
trips.

Page 15
CARRIER FREQUENCY
The carrier frequency is adjustable from 2.0kHz to 15kHz. The audible sound decreases at the higher frequencies, but RFI noise and
leakage current may be increased. It is recommended that the carrier frequency is 2.3kHz or greater when operating in sensorless
vector A044 = 03.
Function
Parameters
Value
Carrier Frequency b083 2.0 – 15.0 kHz
AUTOMATIC CARRIER FREQUENCY REDUCTION
The automatic carrier frequency reduction automatically reduces the carrier frequency according to the increase in output current.
To enable this function, specify “01” for automatic carrier frequency reduction selection (b089).
When the output current increases to 60%, 72%, 84%, or 96% of the rated current, this function reduces the carrier frequency to 12,
9, 6, or 3 kHz, respectively. This function restores the original carrier frequency when the output decreases to 5% lower than each
reduction start level.
The rate of carrier frequency reduction is 2kHz per second. The maximum limit of carrier frequency change by this function is the
value specified for the carrier frequency setting (b083); the minimum limit is 3 kHz. Note: If 3 kHz or less freq. has been specified for
b083, this function is disabled regardless of the setting of b089.
Function
Parameters
Value
Automatic Carrier Frequency Reduction b089
00 = Disabled
01 = Enabled, depending on the output current
02 = Enabled, depending on the heat-sink
temperature

Page 16
RESET FAULT USING INPUT
Resetting a fault remotely using an input to the VFD can be done by configuring one of the available digital inputs for reset. Use the
chart below.
Function
Parameters
Value
Fault reset C006 – C007 18 = RS
OUTPUT SIGNAL WHEN FAULT OCCURS
You can configure a 24v digital output to turn on when a fault occurs. If the VFD is configured for hoisting, then you will need to
configure the over-weight logic for either maintained or internal in order to free up digital output 12. If you need to change the over-
weight logic, please reference the hoist over-weight function section to change the logic to maintained or internal.
Function
Parameters
Value
Output 12 Function C022 05 = Faut / Alarm
Output 12 Contact Status C032
00 = N.O
01 = N.C
Output 12 On-Delay Time C132 0.0 – 100.0 s
Output 12 Off-Delay Time C133 0.0 – 100.0 s
ELECTRONIC MOTOR THERMAL PROTECTION
The VFD has a built-in electronic motor thermal protection function and is configured for constant torque loading. When the output
current exceeds the value in b012 for a calculated time based on frequency and time the VFD will trip with an E05 fault.
Function
Parameters
Value
Electronic thermal level b012 Motor FLA * 1.25

Page 17
MOTOR BRAKE PARAMETERS
The motor brake parameters ca be adjusted based on the application needs.
Brake wait time for release – After the Brake Release Frequency Setting is reached, the inverter waits for the braking wait time
(b121)
Brake wait time for acceleration – The inverter waits for the Brake Wait Time for Acceleration (b122), and then starts accelerating
the motor up to the set acceleration frequency.
Brake wait time for stopping – Once the brake release signal is turned off, the inverter waits for the Brake Wait Time for Stopping
(b123), and then starts decelerating the motor down to 0Hz.
Function
Parameter
Value
Brake release frequency b125 2.50 Hz
Brake set frequency b127 2.50 Hz
Brake wait time for release b121 0.00 s
Brake wait time for acceleration b122 0.00 s
Brake wait time for stopping b123 0.00 s
AL output relay output function C026 19: BRK
VFD CONTROL MODES
The VFD control mode is pre-set from Detroit Hoist and should not be changed unless directed to by a Detroit Hoist employee.
Constant torque is typically used for all bridge motions and load brake hoist motions. Constant torque can be configured for manual
torque boost or automatic torque boost. The default from Detroit Hoist is manual torque boost. Automatic torque boost uses the
manual torque boost parameters as a start value and then adjusts based on the voltage compensation gain and slip compensation
gain.
Sensorless vector is typically used for hoist trolleys to provide higher torque but can also be used for all motions if configured
correctly.
Function Parameter Value
Supported VFD Control Modes A044 00 = Constant Torque
03 = Sensorless Vector

Page 18
CONSTANT TORQUE CONTROL MODE / MANUAL TORQUE BOOST
Manual Torque Boost – The Constant and Variable Torque algorithms feature an adjustable torque boost curve. When the motor
load has a lot of inertia or starting friction, you may need to increase the low frequency starting torque characteristics by boosting
the voltage above the normal V/f ratio (shown below). The function attempts to compensate for voltage drop in the motor primary
winding in the low-speed range. The boost is applied from zero to the base frequency. You set the breakpoint of the boost (point A
on the graph) by using parameters A042 and A043. The manual boost is calculated as an addition to the standard V/f curve.
Function Parameter Value
Torque Boost Function A041 00 = Manual
Torque Boost Value A042 0.0 – 20.0
Torque Boost Break Point A043 0.0 – 50.0
VFD Torque Control Mode A044 00: Constant Torque

Page 19
CONSTANT TORQUE CONTROL MODE / AUTOMATIC TORQUE BOOST
In constant torque using automatic torque boost the starting torque boost value and frequency break point are used as starting
points for automatic torque boost. Voltage compensation gain and slip compensation gain are used for fine tuning adjustments.
Using parameters A046 and A047, you can obtain better performance under automatic torque boost mode (A041=01). See following
table for the concept of adjustment, including other parameters.
Function
Parameter
Value
Torque Boost Function A041 01 = Automatic
Torque Boost Value A042 0.0 – 20.0
Torque Boost Break Point A043 0.0 – 50.0
VFD Torque Control Mode A044 00: Constant Torque
Voltage Compensation Gain A046 0 – 255
Slip Compensation Gain A047 0 – 255
FINE TUNING AUTOMATIC TORQUE BOOST
Symptom
Adjustment
Parameter
Motor torque is not enough at low speed
(The motor does not rotate at low speed)
Increase the voltage setting for manual torque boost,
step by step A042
Increase the voltage compensation gain for automatic
torque boost, step by step A046
Increase the slip compensation gain for automatic
torque boost, step by step A047
Reduce carrier frequency b083
Motor speed decreases (stalls) when a load is
given to the motor
Increase the slip compensation gain for automatic
torque boost, step by step A047
Motor speed increases when a load is given to
the motor
Decrease the slip compensation gain for automatic
torque boost, step by step A047
The inverter trips due to overcurrent when a
load is given to the motor
Decrease the voltage setting for manual torque boost,
step by step A042
Decrease the voltage compensation gain for automatic
torque boost, step by step A046
Decrease the slip compensation gain for automatic
torque boost, step by step A047

Page 20
SENSORLESS VECTOR CONTROL MODE
Sensorless vector control can achieve high torque performance (200% torque at 0.5Hz of output frequency) without motor speed
feedback (encoder feedback). Sensorless vector control enables the inverter to accurately operate the motor with a high starting
torque, even at low speed. It estimates and controls the motor speed and output torque based on the inverter output voltage,
output current, and the set motor constants on the inverter.
When using the sensorless vector function all parameters related to manual torque boost and automatic torque boost are
disregarded.
To use sensorless vector function, set parameter A044 to the value of “3” and set parameter H003 to the closest value of the
combined connected motors in kW’s. In some cases, the value for H003 might need to be set (1) size larger or smaller in order to
obtain good performance.
Function
Parameter
Value
VFD Torque Control Mode A044 03: Sensorless Vector
Carrier Frequency b083 2.3 kHz or greater
Combined Connected Motor’s kW Constant H003 0.1 – 18.5 kW
In sensorless vector you gain the ability to use the torque limit functions and torque monitor. The torque limit function can be used
in traverse motions to help reduce load swing by setting the value of the forward and reverse driving torque limits to a value just
over the required torque to move a 100% load. Reference the reduced load swing section for more information and setup
instructions.