Protective and Diagnostic Functions. Omron L7
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Protective and Diagnostic Functions
This section describes the fault and alarm functions of the Inverter. These functions include fault detection, alarm detection, programming error detection and auto-tuning error detection.
7
Fault Detection
When the Inverter detects a fault, the fault contact output is operated and the Inverter output is switched OFF and the motor coasts to stop. (The stopping method can be selected for some faults.) A fault code is displayed on the Digital Operator/LED Monitor.
The faults can be categorized in two groups:
•
•
Faults that can be reset without cycling the power using an input or the reset key at the Digital Operator
(resetable faults)
Faults that require to cycle the power (non-resetable faults)
When a fault has occurred refer to the following to identify the fault and to correct the causes.
To reset a fault it is necessary to remove the RUN signal and correct the fault reason. Otherwise a Reset is not accepted or the Inverter trips with the same fault again.
The following tables shows a list of faults and corrective actions.
Display
GF
Ground Fault
OC
Over Current
PUF
DC Bus Fuse Open
Meaning
Table 7.1 Resetable Faults
Probable Causes Corrective Actions
Remove the motor and run the
Inverter without the motor.
Ground Fault
The ground current at the Inverter output exceeded 50% of the Inverter rated output current and L8-09=1 (Enabled).
One Inverter output was shorted to ground or a DCCT is defective.
The output contactor was opened when the inverter output was still active.
Check the motor for a phase to ground short.
Check the output current with a clampmeter to verify the DCCT reading.
Check the control sequence for wrong motor contactor signals.
Overcurrent
The Inverter’s output current exceeded the overcurrent detection level.
Shorted Inverter output phase-to-phase, shorted motor, locked rotor, too heavy load, accel/decel time too short, contactor on the Inverter output has opened or closed, a special motor or a motor with a rated current larger than the Inverter’s output current is used.
Remove the motor and run the
Inverter without the motor.
Check the motor for a phase-tophase short.
Verify the accel/decel times
(C1-).
Check the Inverter for a phase-tophase short at the output.
DC Bus Fuse blown.
The fuse in the main circuit is open.
Warning:
Never run the Inverter after replacing the DC bus fuse without checking for shorted components.
Shorted output transistor(s) or terminals.
Check the motor and the motor cables for short circuits or insulation failures (phase-to-phase).
Replace the inverter after correcting the fault.
7-
2
Display
OV
DC Bus Overvolt
UV1
DC Bus Undervolt
UV2
CTL PS Undervolt
Table 7.1 Resetable Faults
Meaning Probable Causes
The deceleration time is set too short and the regenerative energy from the motor is too large.
Corrective Actions
Increase the deceleration time (C1-
02/04/06/08) or connect a braking option.
DC Bus Overvoltage
The DC bus voltage has exceeded the overvoltage detection level.
Default detection levels are:
200 V class: 410 VDC
400 V class: 820 VDC
The power supply voltage is too high.
The braking chopper / braking resistor is not working.
Check the power supply and decrease the voltage to meet the inverter’s specifications.
Check the braking chopper / resistor.
DC Bus Undervoltage
The DC bus voltage is below the Undervoltage Detection Level
(L2-05). The default settings are:
200V class: 190 VDC
400 V class: 380 VDC
The voltage fluctuations of the power supply are too high.
A momentary power loss occurred.
An open-phase error occurred at the input terminals.
Check the input voltage.
The terminal screws of the input power supply are loose.
Check the wiring of the input terminals.
Check the input voltage and the wiring of the input terminals.
Main Circuit MC Operation Failure
The MC stopped responding during
Inverter operation.
Control Power Supply Undervoltage
Undervoltage of the control circuit while the Inverter was running.
The acceleration time is set too short.
Extend the settings in
C1-01/03/05/07
An error occurred in the inrush current prevention circuit while the Inverter was running.
Replace the Inverter.
External load was pulling down the
Inverter’s power supplies or there was an internal short in the power/gate drive board.
Remove all connection to the control terminals and cycle the power to the Inverter.
Replace the Inverter.
UV3
MC Answerback
Inrush Current Prevention Circuit Fault
An overheating of the charging resistor for the DC bus capacitors occurred.
Cycle the power to the Inverter.
The MC of the charging circuit did not respond 10 sec. after the MC ON signal has been output.
The contactor of the inrush current prevention circuit is defective.
(Applicable Inverter Capacities
200 V class: 37 to 55 kW)
Replace the Inverter if the fault continues to occur.
PF
Input Phase Loss
LF
Output Phase Loss
The wiring terminals for the input power supply are loose.
Main Circuit Voltage Fault
A phase loss occurred in the input power supply.
An unusual big ripple on the DC bus voltage has been detected.
A momentary power loss occurred
Only detected when L8-05=1 (enabled)
The voltage fluctuation of the input power supply is too high.
The voltage balance between the input phases is bad.
Tighten the input terminal screws
Check the power supply voltage
Output Open-phase
There is a broken wire in the output cable.
An open-phase occurred at the Inverter output.
The motor winding is broken.
The output terminals are loose.
The fault is detected when the output current falls below 5% of the inverter rated current and L8-07=1 (enabled)
The motor has a capacity less than 5% of the Inverter's maximum motor capacity.
Reset the fault after correcting its cause.
Check the motor and Inverter capacity.
7
7-
3
7
Display
OH
Heatsink Overtemp
OH1
Heatsink Max Temp
RR
DynBrk Transistr
OL1
Motor Overload
OL2
Inv Overload
OL3
Car Stuck
OL4
Car Stuck
UL3
Undertorq Det 1
Table 7.1 Resetable Faults
Meaning Probable Causes
The temperature is too high.
Corrective Actions
Check for dirt build-up on the fans or heatsink.
Heatsink Overheat
The temperature of the Inverter's cooling fin exceeded the setting in L8-02 and L8-03 is set to 0,1 or 2.
Inverter's Cooling Fan Stopped
There is a heat source nearby.
Reduce the ambient temperature around the drive.
The Inverter's cooling fan(s) is/are broken.
Replace the cooling fan(s).
The Inverter's internal cooling fan is broken (18.5 kW and larger).
The ambient temperature is too high.
Check for dirt build-up on the fans or heatsink.
Heatsink Overheat
The temperature of the Inverter’s heatsink exceeded 105 °C.
There is a heat source nearby.
Inverter’s Cooling Fan Stopped
Reduce the ambient temperature around the drive.
The Inverter’s cooling fan(s) is/are broken.
Replace the cooling fan(s).
The Inverter’s internal cooling fan is broken (18.5 kW and larger).
Dynamic Braking Transistor
The built-in dynamic braking transistor failed.
Defective or failed dynamic braking resistor caused braking transistor damage.
Cycle power to the Inverter.
Replace the Inverter.
Motor Overload
Detected when L1-01 is set to 1,2 or 3 and the Inverter’s output current exceeded the motor overload curve.
The overload curve is adjustable using parameter E2-01 (Motor Rated Current), L1-01 (Motor Protection Selection) and L2-02 (Motor Protection
Time Constant)
The load is too large. The acceleration time, deceleration time or cycle time are too short.
The voltage settings of the V/f pattern is incorrect.
The setting of Motor Rated Current
(E2-01) is incorrect.
Recheck the cycle time and the size of the load as well as the accel/ decel times
(C1-).
Check the V/f characteristics (E1-
).
Check the setting of Motor Rated
Current Setting (E2-01).
Inverter Overload
The Inverter output current exceeded the Inverter’s overload capability.
The load is too large. The acceleration time or deceleration times are too short.
Recheck the cycle time and the size of the load as well as the accel/ decel times
(C1-).
The voltage settings of the V/f pattern is incorrect.
Check the V/f characteristics (E1-
).
The size of the Inverter is too small.
Check the setting of Motor Rated
Current Setting (E2-01).
Overtorque/Car Stuck Detection 1
The Inverter’s output current (V/f control) or the output torque (Vector Control) exceeded L6-02 for longer than the time set in L6-03 and L6-01 is set to
3 or 4.
Motor was overloaded.
Overtorque/Car Stuck Detection 2
The Inverter’s output current (V/f control) or the output torque (Vector Control) exceeded L6-05 for longer than the time set in L6-06 and L6-04 is set to
3 or 4.
Motor was overloaded.
Undertorque Detection 1
The Inverter’s output current (V/f control) or the output torque (Vector control) fell below L6-02 for longer than the time set in L6-03 and L6-01 is set to
7 or 8.
Motor was underloaded.
Ensure the values in L6-02 and L6-
03 are appropriate.
Check application/machine status to eliminate fault.
Ensure the values in L6-05 and L6-
06 are appropriate.
Check application/machine status to eliminate fault.
Ensure the values in L6-02 and L6-
03 are appropriate.
Check application/machine status to eliminate fault.
7-
4
Display
UL4
Undertorq Det 2
OS
Overspeed Det
PGO
PG Open
DEV
Speed Deviation
DV3
DV4
DV6
Over Acceleration
SVE
Zero Servo Fault
Table 7.1 Resetable Faults
Meaning Probable Causes
Undertorque Detection 2
The Inverter’s output current (V/f control) or the output torque (Vector control) fell below L6-05 for longer than the time set in L6-06 and L6-04 is set to
7 or 8.
Motor was underloaded.
Corrective Actions
Ensure the values in L6-05 and L6-
06 are appropriate.
Check application/machine status to eliminate fault.
Motor Overspeed
Overshooting/Undershooting occurs.
Detected when F1-03 is set to 0, 1 or 2 and A1-02 is set to 3.
The motor speed feedback (U1-05) exceeded the setting in F1-08 for a time longer than the setting of F1-09.
The reference was too high.
The settings in F1-08 and F1-09 are not appropriate.
Adjust the ASR settings in the C5 parameter group.
Check the reference circuit and reference gain.
Check the settings in F1-08 and F1-
09.
The PG wiring is broken.
PG Disconnection
Detected when F1-02 is set to 0, 1 or 2 and A1-02 is set to 3 or 6
The PG is wired incorrectly.
Detected when no PG (encoder) pulses are received for a time longer than the setting of F1-14.
Power is not supplied to the PG.
Wrong brake control sequence. The motor runs against the closed brake.
Fix the broken/disconnected wiring.
Fix the wiring.
Supply power to the PG properly.
Check the sequence and if the brake is opened when the inverter starts to increase the speed.
Reduce the load.
The load is too large.
Excessive Speed Deviation
The acceleration time and deceleration time are too short.
Detected when F1-04 is set to 0, 1 or 2 and A1-02 is set to 3 or 6
The load is locked.
The speed deviation is higher than the setting of F1-10 for a time longer than the setting of F1-11.
Lengthen the acceleration time and deceleration time.
Check the mechanical system.
The settings of F1-10 and F1-11 are not appropriate.
Check the settings of F1-10 and F1-
11.
Wrong brake control sequence. The motor runs against the closed brake.
Check the sequence and if the brake is opened when the inverter starts to increase the speed.
Wrong rotation direction
Detected when the speed deviation is higher than 30% and the torque reference and acceleration have opposite signs.
PG wire broken
Incorrect PG wiring
Wrong magnet position compensation value (F1-22)
Check the PG wiring
Correct the wiring
Verify the PG direction and execute an encoder offset auto tuning
The load is too large
Wrong rotation direction
Detected when F1-19 is not 0, the speed reference and motor speed have opposite signs and the detection threshold set in F1-19 is exceeded.
The magnet position offset setting in
F1-22 is wrong
The load is too large
The load is too large
Reduce the load and check the brake
Verify the PG direction and execute an encoder offset auto tuning
Reduce the load and check the brake
An over acceleration of the car was detected (A1-02 = 6 only)
Magnet position offset is wrong
Sheave diameter, gear ratio or roping setting incorrect
Reduce the load
Check the PG direction, check F1-
22 and perform an encoder offset tuning.
Verify the settings of S3-13, S3-14 and S3-15.
Too short acceleration or deceleration time.
Adjust the acceleration and deceleration times.
Zero Servo Fault
The torque limit is too small.
The motor position moved during Zero
Servo Operation.
The load torque is too large.
-
Increase the torque limit.
Decrease the load torque.
Check for signal noise.
7
7-
5
7
Display
CF
Out of Control
EF0
Opt External Flt
Table 7.1 Resetable Faults
Meaning Probable Causes
Control Fault
A torque limit was reached continuously for 3 seconds or longer during a deceleration stop in Open Loop Vector control.
Motor parameters were not set properly.
Corrective Actions
Check the motor parameters.
External fault input from Communications Option Card
An external fault condition was present, input from a communication option card.
Check for an external fault condition.
Verify the parameters.
Verify communication signals
External fault at terminal S3
EF3
Ext Fault S3
EF4
Ext Fault S4
EF5
Ext Fault S5
EF6
Ext Fault S6
EF 7
Ext Fault S7
CE
Memobus Com Err
BUS
Option Com Err
SE1
Sequence Error 1
SE2
Sequence Error 2
SE3
Sequence Error 3
Ref Missing
FRL
External fault at terminal S4
External fault at terminal S5
External fault at terminal S6
An “external fault” was input from a multi-function input terminal (S3 to
S7).
Eliminate the cause of the external fault condition.
External fault at terminal S7
MEMOBUS Communication Error
Detected when control data was not received correctly for two seconds, H5-
04 is set to 0,1 or 2 and H5-05 is set to
1.
Connection is broken and/or the master has stopped the communication.
Check the connections and all PLCside software configurations.
Option Communication Error
After initial communication has been established, the connection got lost.
Connection is broken and/or the master has stopped the communication.
Check the connections and all PLCside software configurations.
Detected no output contactor answer back for S1-16 time setting.
The output current at start was below
25% of no-load current.
The output current during run was below 25% of no-load current.
No speed was selected before the inverter start.
The output contactor or auxiliary switch has a malfunction.
Check the output contactor.
The output contactor was not closed at start.
Check the output contactor.
The output contactor was opened during run.
Check the output contactor.
A start signal was given and no speed was selected when d1-18 = 1 and
H1-K83.
Check the speed selection/start sequence.
CPF00
COM-ERR(OP&INV)
CPF01
COM-ERR(OP&INV)
Table 7.2 Not Resetable Faults
Digital Operator/LED Monitor Communication Fault 1
Communication with the digital operator could not be established within 5 seconds after the power was supplied to the Inverter.
Digital operator cable was not securely connected or digital operator is defective and/or control board is defective
Disconnect the Digital Operator/
LED Monitor and then connect it again.
Replace the Inverter.
CPU External RAM Fault The control board is damaged.
Cycle the Inverter power supply.
Replace the Inverter.
Digital Operator/LED Monitor Communication Fault 2
Digital operator cable is not properly connected or the digital operator is defective
After communications with the digital operator was established, the communication stopped for 2 seconds or more.
The control board is damaged.
Disconnect the Digital Operator/
LED Monitor and then connect it again.
Cycle the Inverter power supply.
Replace the Inverter.
7-
6
CPF02
BB Circuit Err
CPF03
EEPROM Error
CPF04
Internal A/D Err
CPF05
External A/D Err
CPF06
Option Error
CPF07
RAM-Err
CPF08
WAT-Err
CPF09
CPU-Err
CPF10
ASIC-Err
CPF20
Option A/D Error
CPF21
Option CPU Down
Table 7.2 Not Resetable Faults
Baseblock circuit error
A baseblock circuit error occurred at power-up.
EEPROM error
Check sum is not valid
CPU Internal A/D Converter Fault
CPU External A/D Converter Fault
Option Card Connection Fault
Gate array hardware failure at powerup.
Perform an initialization to factory defaults.
Cycle the Inverter power supply.
Replace the Inverter.
Noise or spike was on the control circuit input terminals or the control board is damaged.
Perform an initialization to factory defaults.
Cycle the Inverter power supply.
Replace the Inverter.
Noise or spike was on the control circuit input terminals or the control board is damaged.
Perform an initialization to factory defaults.
Cycle the Inverter power supply.
Replace the Inverter.
Noise or spike was on the control circuit input terminals or the control board is damaged.
Perform an initialization to factory defaults.
Cycle the Inverter power supply.
Replace the Inverter.
The Option Card is not connected properly.
Turn off the power and reinstall the Option Card again.
The Inverter or Option Card is damaged.
Replace the Option Card or the
Inverter.
ASIC Internal RAM fault
Watchdog Timer Fault
CPU-ASIC Mutual
Diagnosis Fault
-
The control circuit is damaged.
-
The control circuit is damaged.
-
The control circuit is damaged.
The control circuit is damaged.
Cycle the Inverter power supply.
Replace the Inverter.
Cycle the Inverter power supply.
Replace the Inverter.
Cycle the Inverter power supply.
Replace the Inverter.
Replace the Inverter.
ASIC version fault
Communication Option Card A/D Converter Error
Self-diagnosis Fault of
Option Board
Option board connection is not correct.
Option card A/D converter is faulty.
Turn off the power and re-install the option board again
Remove all inputs to the option board
Perform an initialization to factory defaults.
Cycle the Inverter power supply.
Replace the option board
Replace the inverter
Perform an initialization to factory defaults.
Noise or spike was on the communication line and/or defective option board.
Cycle the Inverter power supply.
Replace the option board
Replace the Inverter
7
7-
7
7
CPF22
Option Type Err
CPF23
Option DPRAM Err
CPF24
Option Comm Err
Table 7.2 Not Resetable Faults
Option Board Code Number Fault
Option Board
Interconnection Fault
Remove any option boards
Perform an initialization to factory defaults
An unrecognizable option board is connected to the control board. Cycle the Inverter power supply.
Replace the option board
Replace the Inverter
Turn off the power and reinstall the option board again
An option board was not correctly connected to the control board, or an option board which is not made for the
Inverter has been attached to the control board.
Perform an initialization to factory defaults
Cycle the Inverter power supply.
Replace the option board
Replace the Inverter
PG-F2 (Hiperface y / EnDat) serial communication error
Detected when no data were received from the encoder for 200 msec
Encoder connection wiring broken or encoder broken
Check the encoder connection or replace the encoder if necessary
7-
8
Alarm Detection
Alarms are Inverter protection functions that indicate unusual conditions without switching off the drive and operating the fault output contact. The alarm automatically disappears when its cause is eliminated.
During an alarm condition, the Digital Operator/LED Monitor alarm display flashes and an alarm output is generated at the multi-function outputs (H2-01 to H2-03) if programmed.
When an alarm occurs, take appropriate countermeasures according to the table below.
Display
EF
External Fault
(flashing)
UV
DC Bus Undervolt
(flashing)
OV
DC Bus Overvolt
(flashing)
OH
Heatsnk Overtmp
(flashing)
OL3
Car Stuck
(flashing)
OL4
Car Stuck
(flashing)
Table 7.3 Alarm Detection
Meaning Probable causes
Forward/Reverse Run Commands
Input Together
Both the forward and the reverse run commands are input simultaneously for
500ms or more. This alarm stops the motor.
Control sequence is faulty.
Corrective Actions
Check external sequence logic, so that only one input is received at a time.
DC Bus Undervoltage
The following conditions occurred
• The DC bus voltage was below the
Undervoltage Detection Level Setting (L2-05).
• The MC of the inrush current prevention circuit was opened.
• The control power supply voltage was below the CUV level.
UV Alarm is detected only, when the drive is in stop condition
For the probable reasons please have a look at UV1, UV2 and UV3 in table
7.1.
For the corrective actions please have a look at UV1, UV2 and UV3 in table 7.1
DC Bus Overvoltage
The DC bus voltage exceeded the overvoltage detection level.
200 V class: 410 VDC
400 V class: 820 VDC
An OV Alarm is detected only, when the drive is in stop condition.
The power supply voltage is too high.
Check the power supply and decrease the voltage to meet the
Inverter’s specifications
Heatsink Overheat
The temperature of the Inverter's cooling fin exceeded the temperature programmed in L8-02.
Enabled when L8-03 = 3.
The ambient temperature is too high.
There is a heat source nearby.
The Inverter cooling fan(s) has stopped.
Check for dirt build-up on the fans or heatsink.
Reduce the ambient temperature around the Inverter
Replace the cooling fan(s).
Overtorque Detection 1
The Inverter’s output current (V/f control) or the output torque (Vector control) exceeded L6-02 for longer than the time set in L6-03 and L6-01is set to
1 or 2.
Motor was overloaded
Ensure the values in L6-02 and L6-
03 are appropriate.
Check application/machine status to eliminate fault.
Overtorque Detection 1
The Inverter’s output current (V/f control) or the output torque (Vector control) exceeded L6-02 for longer than the time set in L6-03 and L6-01 is set to
1 or 2.
Motor was overloaded
Ensure the values in L6-05 and L6-
06 are appropriate.
Check application/machine status to eliminate fault.
7
7-
9
7
Display
UL3
Undertorque Det 1
(flashing)
UL4
Undertorque Det 2
(flashing)
OS
Overspeed Det
(flashing)
PGO
PG Open
(flashing)
DEV
Speed Deviation
(flashing)
EF0
Opt External Flt
(flashing)
Table 7.3 Alarm Detection
Meaning Probable causes
Undertorque Detection 1
The Inverter’s output current (V/f control) or the output torque (Vector control) fell below L6-02 for longer than the time set in L6-03 and L6-01 is set to
5 or 6.
Motor was underloaded
Corrective Actions
Ensure the values in L6-02 and L6-
03 are appropriate.
Check application/machine status to eliminate fault.
Undertorque Detection 2
The Inverter’s output current (V/f control) or the output torque (Vector control) fell below L6-05 for longer than the time set in L6-06 and L6-04 is set to
5 or 6.
Motor was underloaded
Ensure the values in L6-05 and L6-
06 are appropriate.
Check application/machine status to eliminate fault.
Overspeed Alarm
Detected when A1-02 is set to 1 or 3 and F1-03 is set to 3.
The motor speed feedback (U1-05) exceeded the value set in F1-08 for a time longer than the setting of F1-09.
PG Disconnection
Detected when F1-02 is set to 3 and
A1-02 is set to 1 or 3.
Overshooting/undershooting occurs.
The reference was too high.
Adjust the ASR settings in the C5 parameter group.
Check the reference circuit and reference gain.
The settings in F1-08 and F1-09 are not appropriate.
Check the settings in F1-08 and
F1-09.
The PG wiring is broken.
The PG is wired incorrectly.
Detected when no PG (encoder) pulses are received for a time longer than the setting of F1-14
Power is not supplied to the PG.
Fix the broken/disconnected wiring.
Check the wiring
Supply the correct power to the PG.
Excessive Speed Deviation
Detected when F1-04 is set to 3 and
The load is too large.
Reduce the load.
The acceleration time and deceleration time are too short.
Lengthen the acceleration time and deceleration time.
A1-02 is set to 1 or 3.
The speed deviation is higher than the setting of F1-10 for longer than the setting of F1-11.
The load is locked.
The settings in F1-10 and F1-11 are not appropriate.
Check the mechanical system.
Check the settings in F1-10 and F1-
11.
The load is too large
An over acceleration of the car was detected (A1-02 = 6 only)
Magnet position offset is wrong
Sheave diameter, gear ratio or roping setting incorrect
Reduce the load
Check the PG direction, check
F1-22 and perform an encoder offset tuning.
Verify the settings of S3-13, S3-14 and S3-15.
Too short acceleration or deceleration time.
Adjust the acceleration and deceleration times.
Check for an external fault condition.
Communication Option Card External
Fault
An external fault condition was input from by communication option card.
Verify the parameters.
Verify communication signals
7-
10
Display
EF3
Ext Fault S3
(flashing)
EF4
Ext Fault S4
(flashing)
EF5
Ext Fault S5
(flashing)
EF6
Ext Fault S6
(flashing)
EF7
Ext Fault S7
(flashing)
BUS
Option Com Err
(flashing)
Ext Run Active
Cannot Reset
Ext Run Active
Cannot Reset
FF_CAL
Meaning
Table 7.3 Alarm Detection
Probable causes
External fault at terminal S3
External fault at terminal S4
External fault at terminal S5
External fault at terminal S6
Corrective Actions
An external fault was input by a multifunction input terminal
(S3 to S7) which is programmed for the external fault function alarm output.
Eliminate the cause of the external fault condition
External fault at terminal S7
Option Communications Alarm
After initial communication was established, the connection was lost.
Connection is broken and/or the master has stopped the communication.
Check the connections and all userside software configurations.
Detected after a fault when a RESET command is input while the RUN command is still active
The RUN command has not been removed and a RESET command is input by digital input or by the RESET button on the digital operator.
Remove the RUN signal first and reset the error.
An inverter fault can’t be reset.
The fault was tried to be reset when a direction signal (Up/Down) was still active.
Remove the direction signal and retry to reset the fault.
If the fault reset is handled by a
PLC, check the sequence.
Feed forward motor acceleration time active
Motor acceleration time calculation was activated by setting n5-05 = 1 and enabling the inspection input
• Perform the complete tuning procedure
• Abort the tuning by setting n5-05 = 0.
7
7-
11
7
Operator Programming Errors
An Operator Programming Error (OPE) occurs when two or more parameter related to each other are set inappropriate or an individual parameter setting is incorrect. The Inverter does not operate until the parameter setting is set correctly; however, no other alarm or fault outputs will occur. If an OPE occurs, change the related parameter by checking the cause shown in
Table 7.4
. When an OPE error is displayed, press the ENTER key to see U1-34 (OPE Detected). This monitor displays the parameter that is causing the OPE error.
Table 7.4 Operator Programming Errors
Display Meaning
OPE01 kVA Selection
Inverter kVA Setting Error
Probable Causes Corrective Actions
The control board was replaced and the kVA parameter (o2-04) is incorrect.
Enter the correct kVA setting by referring to
page 5-63, Factory Settings Changing with Inverter
A not suitable software has beenn installed on the inverter.
Compare U1-14 and the software number in the nameplate. Replace the software if necessary.
Parameter Setting is out of range
OPE02
Limit
OPE03
Terminal
Hiperface y
selected (n8-35=4) and:
• F1-01 is different from 512 or 1024
• F1-21 is set to 2
EnDat selected (n8-35=5) and:
• F1-01 is different from 512 or 2048
• F1-21 is set to 0 or 1
Parameter setting was outside of the allowable range.
S3-01 = 2 (Advanced short floor) and:
• E1-04 > 100Hz or
• E1-04 < 6Hz or
• d1-09 > 100Hz or
• d1-09 < 4.8Hz or
• C1-01 to C1-08 > 50sec or
• C1-01 to C1-08 < 0.1 sec.
Multi-function Input
Selection Error
Verify the parameter settings.
One of the following errors has been made in the multi-function input
(H1-01 to H1-05) settings:
• Functions were selected duplicative.
• External Baseblock NO (8) and
External Baseblock NC (9) were selected at the same time.
• The Emergency Stop Command NO
(15) and NC(17) are set simultaneously.
Verify the parameter settings in H1-
OPE05
Sequence Selection
OPE06
PG Opt Missing
OPE08
Constant Selection
RUN/Reference Command
Selection Error
The Reference Source Selection b1-01 and/or the RUN Source Selection parameter b1-02 are set to 3 (option board) but no option board is installed.
Option board is not installed or is installed incorrectly
Control method selection error
Function Selection Error
Verify that the board is installed.
Remove the power supply and reinstall the option board again
Recheck the setting of b1-01 and b1-02.
One of the control methods needing a
PG feedback was selected (A1-02 =3/
6), but a PG option board is not installed.
Verify the control method selection in parameter A1-02 and/or the installation of the PG option board.
A setting has been made, which is not applicable with the current control method.
Example: A function used only with open loop vector control was selected for V/f control.
Verify the control method and the function.
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12
Display
OPE10
V/f Ptrn Setting
ERR
EEPROM R/W Err
Table 7.4 Operator Programming Errors
Meaning
V/f Parameter Setting Error
Probable Causes
V/f parameter settings were out of range.
Corrective Actions
Check parameters (E1-). A frequency/voltage value may be set higher than the maximum frequency/voltage.
Cycle power to the Inverter.
EEPROM write error
The NV-RAM data does not match the
EEPROM data.
A verification error occurred when writing EEPROM.
Do a factory initialization (A1-03)
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7
Auto-tuning Faults
Auto-tuning faults are shown below. When the following faults are detected, the fault is displayed on the digital operator and the motor coasts to stop. No fault or alarm outputs will be operated.
Table 7.5 Auto-tuning Faults
Display Meaning
Fault Motor data fault
Probable causes
There is an error in the data input for autotuning.
Corrective Actions
Check the input data.
There is an error in the relationship between the motor output and the motor rated current.
Check the Inverter and motor capacity.
There is an error between the no-load current setting and the input motor rated current (when auto-tuning for line-to-line resistance is performed for vector control)
Check the motor rated current and no-load current.
Check the input data.
Minor Fault
STOP key
Alarm
STOP key input
An alarm is detected during auto-tuning.
Check wiring and the machine.
Check the load.
The STOP key was pressed to cancel autotuning.
-
Resistance
No-Load Current
Line-to-Line Resistance Fault
No-Load Current Fault
Autotuning was not completed in the specified time.
The auto-tuning result is outside the parameter setting range.
• Check the input data.
• Check the motor wiring.
• If the motor is connected to the machine, disconnect it.
• If the setting of T1-03 is higher than the Inverter input power supply voltage (E1-01), change the input data.
Rated slip Rated Slip Fault
Accelerate
Motor Speed
I-det. Circuit
Acceleration error (detected during rotating autotuning only)
Motor Speed Fault
Detected only for rotating autotuning
The motor did not accelerate in the specified time.
Rotating autotuning was performed with a high load connected.
The torque reference exceeded 100% during acceleration.
Detected only when A1-02 is set to 2
(Open Loop Vector control).
• Increase C1-01 (Acceleration
Time 1).
• Increase L7-01 and L7-02
(Torque Limits) if they are low.
• Remove the ropes and repeat the tuning.
• If the motor is connected to the machine, disconnect it.
• Increase C1-01 (Acceleration
Time 1).
• Check the input data (particularly the number of PG pulses and the number of motor poles).
• Perform not rotating auto tuning
Current Detection Fault
The current exceeded the motor rated current.
Check wiring of the Inverter and the mounting.
Any of U/T1, V/T2 and W/T3 has open-phase
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14
Display
Leakage Inductance Fault
Z_SRCH_ERR
(PM motor tuning only)
LD_ERR
(PM motor tuning only)
RS_ERR
(PM motor tuning only)
KE_ERR
(PM motor tuning only)
End - 1
V/f Over Setting
End - 2
Saturation
End - 3
Rated FLA Alm
Table 7.5 Auto-tuning Faults
Meaning
The leakage inductance measurement caused an error.
Probable causes
Auto-tuning was not completed in the specified time.
Auto-tuning result is outside the parameter setting range.
Corrective Actions
• Check the motor wiring.
• Check the motor rated current input value
The leakage inductance tuning current was too high or too low (Closed Loop
Vector for PM only)
Reduce or increase the current level for leakage inductance tuning by changing parameter n8-46.
All encoders
Encoder with Z-pulse
Serial encoders
Inductance error
The motor speed exceeded 20 rpm at the auto tuning start.
The magnetic pole position tuning could not be performed in the specified time.
The difference between two measurements of the magnet pole position was higher than 3°.
• Remove the ropes and repeat the tuning
• Check the encoder rotation direction and if necessary change
F1-05.
The difference between two measurements of the magnet pole position was higher than 5°.
An encoder serial communication error has occurred during the tuning.
• Check the encoder wiring (order, shield etc.)
• Check the encoder power supply.
• Replace the encoder.
The inductance could not be measured in the specified time during the motor rotation.
Check the motor wiring
Line-to-line resistance error
Voltage constant error
The resistance could not be measured in the specified time during the motor rotation or the calculated value was out of range.
• Check the motor wiring
• Check the motor input data
The voltage constant could not be measured in the specified time during the motor rotation.
Check the motor wiring
V/f Settings Alarm
Displayed after auto-tuning is complete
The torque reference exceeded 100% and the no-load current exceeded 70% during auto-tuning.
Check and correct the motor settings
If the motor and the machine are connected, disconnect the motor from the machine.
Motor Core Saturation Fault
Displayed after auto-tuning is complete.
Detected only for rotating autotuning
Check the input data.
During auto-tuning, the measured values of motor iron-core saturation coefficient 1 and 2 (E2-07 and E2-08) exceeded its setting range.
Check the motor wiring.
If the motor and the machine are connected, disconnect the motor from the machine.
Rated Current Setting Alarm
Displayed after auto-tuning is complete
During auto-tuning, the measured value of motor rated current (E2-01) was higher than the set value.
Check the motor rated current value.
7
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7
Digital Operator Copy Function Faults
These faults can occur during the digital operator COPY function. When a fault occurs, the fault content is displayed on the operator. The fault or alarm contact output is not operated.
Table 7.6 Operator Copy Function Faults
Function
Digital Operator
Display
Probable Causes Corrective Actions
READ
Function
PRE
READ IMPOSSIBLE
IFE
READ DATA ERROR o3-01 was set to 1 to write parameter into the Digital Operator when the Operator was write-protected
(o3-02 = 0).
Set o3-02 to enable writing parameters into the
Operator’s memory.
Retry the READ command (o3-01 = 1).
The data file read from the Inverter was of the wrong size indicating corrupted data.
Check the Digital Operator’s cable.
Replace the Digital Operator.
COPY
Function
Verify
Function
RDE
DATA ERROR
CPE
ID UNMATCHED
CSE
SUM CHECK ERROR
VYE
VERIFY ERROR
A low Inverter voltage has been detected.
An attempted writing of the Inverter data to the
Digital Operator’s EEPROM failed.
Retry the READ command (o3-01 = 1).
Replace the Digital Operator.
The Inverter type or software number was different from the stored data in the digital operator
Use stored data of the same product (L7) and software number (U1-14) only.
VAE
INV. KVA UNMATCH
CYE
COPY ERROR
The capacity of the Inverter and the capacity of the stored data in the Digital Operator are different.
Use stored data for the same Inverter capacity only
(o2-04).
CRE
CONTROL UNMATCHED
The control method of the Inverter and the control method of the stored data in the Digital Operator are different.
Use stored data for the same control method (A1-02).
A parameter setting written to the Inverter was different from the setting stored in the Digital Operator.
Retry the COPY function (o3-01 = 2)
Upon completion of the COPY function, the
Inverter’s data checksum was different to the digital operator’s data checksum.
Retry the COPY function (o3-01 = 2)
The set value of the digital operator and the Inverter do not match
Retry the Verify function (o3-01 = 3)
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16
Machine Data Copy Function Faults
These faults can occur during the machine data (encoder) COPY function. When a fault occurs, the fault content is displayed on the operator. The fault or alarm contact output is not operated.
Function
WRITE from inverter to encoder
COPY from
Encoder to
Inverter
VERFIY
Table 7.7 Machine Data Copy Function Faults
Digital Operator
Display
Probable Causes
ERE
DATA ERROR
EDE
WRITE IMPOSSIBLE
EIF
WRITE DATA ERROR
ECE
COPY ERROR
EPE
ID MISMATCH
ECS
SUM CHECK ERROR
EVE
VERIFY ERROR
Corrective Actions
A write to encoder command could not be performed since the drive is in UV (under voltage) condition.
Make sure that no fault and no alarm is active and retry.
The write to encoder command is prohibited.
Set parameter F1-26 to 1 to permit a write to encoder command.
A communication error occurred during the write to encoder process.
Retry the write to encoder command.
A read to encoder command could not be performed since the drive is in UV (under voltage) condition.
The data in the encoder do not fit to the L7Z data format.
Make sure that no fault and no alarm is active and retry.
-
The check sum of the data, which were written into the inverter is wrong.
Retry the COPY command.
The data in the encoder and inverter data do not match.
-
7
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17
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