This chapter introduces various alarms and their troubleshooting methods. Users can use this chapter to find the causes and handling methods of alarms.
Alarms are divided into three main categories: "General", "Motion Control Command", and "Communication". Their respective meanings are as follows:
General:Â Includes alarm messages for hardware signals and encoder signals.
Motion Control Command:Â Alarms generated when using motion control commands (in PR mode).
Communication:Â Alarms generated when using EtherCAT communication control.
The seven-segment display shows the alarm code as "AL.nnn", as shown in the figure below:
If the troubleshooting method in this chapter is alarm reset, please use DI.ARST (alarm signal clear) or write 1 to parameter P0.001 to clear the alarm.
I. List of Alien Alarms
1. General Categories
| Abnormal Alarms | Abnormal Name | Types of Abnormalities | Servo Status | ||
| ALM | WARN | ON | OFF | ||
| AL001 | Overcurrent | â—‹ | â—‹ | ||
| AL002 | Overvoltage | â—‹ | â—‹ | ||
| AL003 | Undervoltage | â—‹ | â—‹ | ||
| AL004 | Motor Mismatch Abnormality | â—‹ | â—‹ | ||
| AL005 | Regeneration Error | â—‹ | â—‹ | ||
| AL006 | Overload | â—‹ | â—‹ | ||
| AL007 | Excessive Speed Control Error | â—‹ | â—‹ | ||
| AL008 | Abnormal Pulse Control Command | â—‹ | â—‹ | ||
| AL009 | Excessive Position Control Error | â—‹ | â—‹ | ||
| AL010 | Abnormal Voltage in Regeneration State | â—‹ | â—‹ | ||
| AL011 | Position Detector Abnormality | â—‹ | â—‹ | ||
| AL012 | Calibration Abnormality | â—‹ | â—‹ | ||
| AL013 | Emergency Stop | â—‹ | â—‹ | ||
| AL014 | Reverse Limit Abnormality | â—‹ | â—‹ | ||
| AL015 | Forward Limit Abnormality | â—‹ | â—‹ | ||
| AL016 | Abnormal IGBT Temperature | â—‹ | â—‹ | ||
| AL017 | Memory Abnormality | â—‹ | â—‹ | ||
| AL018 | Position Detector Output Abnormality | â—‹ | â—‹ | ||
| AL020 | Serial Communication Timeout | â—‹ | â—‹ | ||
| AL022 | Main circuit power supply abnormal | â—‹ | â—‹ | ||
| AL023 | Pre-overload warning | â—‹ | â—‹ | ||
| AL024 | Encoder initial magnetic field error | â—‹ | â—‹ | ||
| AL025 | Encoder internal error | â—‹ | â—‹ | ||
| AL026 | Encoder internal data reliability error | â—‹ | â—‹ | ||
| AL027 | Encoder internal reset error | â—‹ | â—‹ | ||
| AL028 | Battery voltage abnormal or encoder internal error | â—‹ | â—‹ | ||
| AL029 | Gray code error | â—‹ | â—‹ | ||
| AL02A | Encoder ring count error | â—‹ | â—‹ | ||
| AL02B | Motor data abnormal | â—‹ | â—‹ | ||
| AL02F | Anti-stall protection | â—‹ | â—‹ | ||
| AL030 | Motor collision error | â—‹ | â—‹ | ||
| AL031 | Motor power line wrong/disconnection detection | â—‹ | â—‹ | ||
| AL032 | Encoder vibration abnormal | â—‹ | â—‹ | ||
| AL033 | Motor abnormal | â—‹ | â—‹ | ||
| AL034 | Encoder internal communication anomaly | â—‹ | â—‹ | ||
| AL035 | Encoder temperature exceeds protection limit | â—‹ | â—‹ | ||
| AL036 | Encoder abnormal warning state | â—‹ | â—‹ | ||
| AL042 | Analog speed voltage input too high | â—‹ | â—‹ | ||
| AL044 | Drive functionality utilization warning | â—‹ | â—‹ | ||
| AL045 | Electronic gear ratio set incorrectly | â—‹ | â—‹ | ||
| AL048 | Position detector output abnormal | â—‹ | â—‹ | ||
| AL053 | Motor parameters not confirmed | â—‹ | â—‹ | ||
| AL056 | Motor speed too high | â—‹ | â—‹ | ||
| AL05C | Motor position feedback abnormal | â—‹ | â—‹ | ||
| AL060 | Absolute position loss | â—‹ | â—‹ | ||
| AL061 | Encoder voltage too low | â—‹ | â—‹ | ||
| AL062 | Absolute position count overflow (encoder) | â—‹ | â—‹ | ||
| AL064 | Encoder vibration warning | â—‹ | â—‹ | ||
| AL066 | Absolute position count overflow (driver) | â—‹ | â—‹ | ||
| AL067 | Encoder temperature warning | â—‹ | â—‹ | ||
| AL068 | Absolute data I/O transmission error | â—‹ | â—‹ | ||
| AL069 | Incorrect motor type | â—‹ | â—‹ | ||
| AL06A | Absolute position loss | â—‹ | â—‹ | ||
| AL06B | Excessive error between internal coordinates of the drive and encoder coordinates | â—‹ | â—‹ | ||
| AL06E | Unrecognized encoder type | â—‹ | â—‹ | ||
| AL06F | Absolute position establishment incomplete | â—‹ | â—‹ | ||
| AL070 | Encoder read/write incomplete warning | â—‹ | â—‹ | ||
| AL071 | Encoder ring count error | â—‹ | â—‹ | ||
| AL072 | Encoder overspeed | â—‹ | â—‹ | ||
| AL073 | Encoder memory error | â—‹ | â—‹ | ||
| AL074 | Encoder single-turn absolute position error | â—‹ | â—‹ | ||
| AL075 | Encoder absolute ring count error | â—‹ | â—‹ | ||
| AL077 | Encoder internal error | â—‹ | â—‹ | ||
| AL079 | Encoder parameter setting incomplete error | â—‹ | â—‹ | ||
| AL07A | Encoder Z phase position lost | â—‹ | â—‹ | ||
| AL07B | Encoder memory busy | â—‹ | â—‹ | ||
| AL07C | When motor speed exceeds 200rpm, issue clear absolute position command | â—‹ | â—‹ | ||
| AL07D | If AL07C is not cleared before power-on again, the motor will stop running | â—‹ | â—‹ | ||
| AL07E | Encoder clearing program error | â—‹ | â—‹ | ||
| AL07F | Encoder version number abnormal | â—‹ | â—‹ | ||
| AL083 | Excessive output current from the driver | â—‹ | â—‹ | ||
| AL085 | Regeneration setting abnormal | â—‹ | â—‹ | ||
| AL086 | Overload in regeneration resistor | â—‹ | â—‹ | ||
| AL088 | Alarm for excessive usage of drive functions | â—‹ | â—‹ | ||
| AL089 | Current sensing interference | â—‹ | â—‹ | ||
| AL08A | Auto gain adjustment command abnormal | â—‹ | â—‹ | ||
| AL08B | Insufficient stop time for auto gain adjustment | â—‹ | â—‹ | ||
| AL08C | Incorrect inertia estimation for auto gain adjustment | â—‹ | â—‹ | ||
| AL095 | Regeneration resistor disconnected or regeneration processing circuit abnormal | ||||
| AL099 | DSP firmware error | â—‹ | â—‹ | ||
| AL09C | Parameter reset failure | â—‹ | â—‹ | ||
| AL0A6 | Mismatch between absolute position coordinates of the drive and motor | â—‹ | â—‹ | ||
| AL422 | Failed write during control power shutdown | â—‹ | â—‹ | ||
| AL521 | Flexible compensation parameter abnormal | â—‹ | â—‹ | ||
| AL35F | Emergency stop (during deceleration) | â—‹ | â—‹ | ||
| AL3CF | Emergency stop | â—‹ | â—‹ | ||
2. Motion Control Command Class
| Abnormal Alarms | Abnormal Name | Types of Abnormalities | Servo Status | ||
| ALM | WARN | ON | OFF | ||
| AL207 | PR command Type-8 instruction - source parameter group out of range | â—‹ | â—‹ | ||
| AL209 | PR command Type-8 instruction - source parameter number out of range | â—‹ | â—‹ | ||
| AL211 | PR command Type-8 instruction - parameter format set incorrectly | â—‹ | â—‹ | ||
| AL213 | PR command Type-8 instruction - parameter set incorrectly | â—‹ | â—‹ | ||
| AL215 | Writing parameter: read-only | â—‹ | â—‹ | ||
| AL217 | Writing parameter: cannot be written when ServoOn | â—‹ | â—‹ | ||
| AL219 | Writing parameter: parameter locked | â—‹ | â—‹ | ||
| AL231 | PR command Type-8 instruction - source monitoring item out of range | â—‹ | â—‹ | ||
| AL235 | Position counter overflow warning | â—‹ | â—‹ | ||
| AL237 | Index coordinate undefined | â—‹ | â—‹ | ||
| AL245 | PR positioning timeout | â—‹ | â—‹ | ||
| AL249 | PR path number out of range | â—‹ | â—‹ | ||
| AL283 | Software forward limit | â—‹ | â—‹ | ||
| AL285 | Software reverse limit | â—‹ | â—‹ | ||
| AL289 | Position counter overflow | â—‹ | â—‹ | ||
| AL380 | Position offset alarm for DO.MC_OK | â—‹ | â—‹ | ||
| AL3F1 | Communication type absolute position command error | â—‹ | â—‹ | ||
| AL400 | Index coordinate setting error | â—‹ | â—‹ | ||
| AL404 | PR special filter setting too large | â—‹ | â—‹ | ||
| AL510 | Internal driver parameter update program exception | â—‹ | â—‹ | ||
| AL520 | Calculation program timeout | â—‹ | â—‹ | ||
| AL555 | System malfunction | â—‹ | â—‹ | ||
| AL809 | PR basic action setting or instruction interpretation error | â—‹ | â—‹ | ||
3. Communications
| Abnormal Alarms | Abnormal Name | Types of Abnormalities | Servo Status | ||
| ALM | WARN | ON | OFF | ||
| AL111 | SDO receives overrun | â—‹ | â—‹ | ||
| AL112 | PDO receives overrun | â—‹ | â—‹ | ||
| AL113 | TxPDO transmission failed | â—‹ | â—‹ | ||
| AL121 | Index error of the object dictionary required by PDO | â—‹ | â—‹ | ||
| AL122 | Sub-index error of the object dictionary required by PDO | â—‹ | â—‹ | ||
| AL123 | Length error of the object dictionary required by PDO | â—‹ | â—‹ | ||
| AL124 | Range error of the object dictionary required by PDO | â—‹ | â—‹ | ||
| AL125 | The object dictionary required by PDO is read-only and cannot be written to | â—‹ | â—‹ | ||
| AL126 | The specified object dictionary cannot be mapped to PDO | â—‹ | â—‹ | ||
| AL127 | The object dictionary required by PDO is not allowed to be written when ServoOn | â—‹ | â—‹ | ||
| AL128 | Error occurred when reading PDO object dictionary from EEPROM | â—‹ | â—‹ | ||
| AL129 | Error occurred when writing PDO object dictionary to EEPROM | â—‹ | â—‹ | ||
| AL130 | EEPROM address exceeds limit | â—‹ | â—‹ | ||
| AL131 | EEPROM CRC calculation error | â—‹ | â—‹ | ||
| AL132 | Write parameter function restricted | â—‹ | â—‹ | ||
| AL170 | Bus communication timeout | â—‹ | â—‹ | ||
| AL180 | Bus communication timeout | â—‹ | â—‹ | ||
| AL185 | Bus hardware abnormality | â—‹ | â—‹ | ||
| AL186 | Bus data transmission error | â—‹ | â—‹ | ||
| AL201 | Object dictionary data initialization error | â—‹ | â—‹ | ||
| AL304 | Interpolation mode command invalid | â—‹ | â—‹ | ||
| AL305 | SYNCPeriod error | â—‹ | â—‹ | ||
| AL3E1 | Communication synchronization failure | â—‹ | â—‹ | ||
| AL3E2 | Communication synchronization signal too fast | â—‹ | â—‹ | ||
| AL3E3 | Communication synchronization signal timeout | â—‹ | â—‹ | ||
| AL401 | NMT Reset command received during Servo On | â—‹ | â—‹ | ||
II. Causes and Disposition of Unusual Alarms
1. AL001 Overcurrent
(1) Trigger conditions and causes of abnormal alarms
Condition: The main circuit current value exceeds 1.5 times the servo drive's instantaneous maximum current peak value.
Cause:
- Driver output shorted.
- Abnormal motor wiring.
- IGBT abnormality.
(2) Inspection and disposal
- Check the motor and driver wiring status or conductor body for short circuits, and prevent metal conductors from being exposed. Check the wiring sequence of the motor to the driver according to the wiring instructions in the manual.
- If abnormal heat sink temperature is found, please send it back to dealer or original factory for repair. Check if the setting value is much larger than the factory default value, it is recommended to revert to the original factory default value first, and then correct it quantity by quantity.
(3) Methods of elimination
Alien Alarm Reset.
2. AL002 Overvoltage
(1) Trigger conditions and causes of abnormal alarms
Condition: The main circuit voltage value is higher than the specification voltage value.
Cause：
- The main circuit input voltage is higher than the rated allowable voltage value.
- Power input error (not the correct power system).
- Drive hardware failure.
- The regeneration resistor is selected incorrectly or the external regeneration resistor is not connected.
(2) Inspection and disposal
- Use a voltmeter to determine if the main circuit input voltage is within the rated allowable voltage (refer to Appendix A specifications), if it exceeds the set value, use the correct voltage source or series regulator; use a voltmeter to determine if the power supply system is in accordance with the specification definition, if it is not, use the correct voltage source or series transformer.
- When this error occurs even though the main circuit input voltage is within the rated allowable voltage value as determined by a voltmeter, return it to the dealer or factory for repair.
- Confirm the connection status of the regeneration resistor and recalculate the regeneration resistor value, and reset the parameter values of P1.052 and P1.053 correctly.
(3) Methods of elimination
Alien Alarm Reset.
3. AL003 Low Voltage
(1) Trigger conditions and causes of abnormal alarms
Condition：
- The main circuit voltage is lower than the specification voltage. The type of abnormality for this alarm is preset as Warning, if you want to set it as Alarm, you can set P2.066 [Bit 9] to 1.
- DC Bus voltage value is less than P4.024 x √2.
Cause：
- The main circuit input voltage is lower than the rated allowable voltage value.
- No input voltage on the main circuit.
- Power input error (not the correct power system).
(2) Inspection and disposal
- Reconfirm the voltage wiring and check that the main circuit input voltage wiring is normal.
- Reconfirm the power switch and measure the main circuit voltage with a voltmeter.
- Determine with a voltmeter whether the power supply system is as defined in the specifications and check that the correct voltage source or series transformer is used.
(3) Methods of elimination
Follow the setting of P2.066 [Bit2] to exclude AL003:
- P2.066 [Bit2] is set to 0. After the voltage is restored, the abnormal alarm needs to be cleared by DI.ARST.
- P2.066 [Bit2] is set to 1. After the voltage is restored, the abnormal alarm is cleared automatically.
4. AL004 Motor Matching Abnormal
(1) Trigger conditions and causes of abnormal alarms
Condition: The motor corresponding to the driver is incorrect.
Cause：
- The motor is incorrectly matched.
- The motor encoder is loose.
- The motor encoder is damaged.
(2) Inspection and disposal
- Replace the motor with one that matches.
- Check and reinstall the motor encoder connector.
- If it is found that the motor encoder is abnormal, replace the motor.
(3) Methods of elimination
Re-energize to clear.
5. AL005 Rebirth Error
(1) Trigger conditions and causes of abnormal alarms
Condition: an error occurs during rebirth.
Cause：
- The regeneration resistor is selected incorrectly or the external regeneration resistor is not connected.
- No regenerative resistor is used, but the user has not set the regenerative resistor capacity parameter (P1.053) to zero.
- Parameter setting error (P1.052, P1.053).
(2) Inspection and disposal
- Confirm the connection status of the regeneration resistor and recalculate the value of regeneration resistor, reset the parameter values of P1.052 and P1.053 correctly, and if the alarm is still not lifted, please send the drive back to the factory.
- If no regenerative resistor is used, set the regenerative resistor capacity (P1.053) to zero.
- Reset and confirm the set values of regenerative resistor value (P1.052) and regenerative resistor capacity (P1.053) correctly.
(3) Methods of elimination
Alien Alarm Reset.
6. AL006 Overload
(1) Trigger conditions and causes of abnormal alarms
Condition: Motor and drive overload.
Cause：
- Exceeding the rated load of the drive and continuous use.
- Improperly set control system parameters.
- The motor and position detector are wired incorrectly.
- The position detector of the motor is defective.
(2) Inspection and disposal
- The average load ratio [%] can be monitored to see if the average load ratio [%] consistently exceeds 100% or more after setting the drive status display (P0.002) to 12. If it consistently exceeds 100% or more (refer to Appendix A Load Ratio vs. Run Time graph), the motor capacity needs to be increased or the load reduced.
- Check the mechanical system for oscillating vibration or acceleration and deceleration settings that are too fast.
- Check that U, V, W and motor encoder wiring is correct.
- Return the motor to the dealer or factory for service.
(3) Methods of elimination
Alien Alarm Reset.
7. AL007 Excessive Speed Control Error
(1) Trigger conditions and causes of abnormal alarms
Condition: The error between the speed command and speed return is greater than the allowable setting (P2.034).
Cause：
- The speed input command changes too drastically.
- The speed control error warning condition (P2.034) is not set properly.
- Incorrect wiring of U, V, W and motor encoder.
(2) Inspection and disposal
- Use a signal detector to check whether the input analog voltage signal is abnormal, you can adjust the input signal variation rate or turn on the filtering function.
- Check that the parameter value of the speed control error warning condition (P2.034) is set appropriately.
- Check for proper wiring of U, V, W and motor encoder.
(3) Methods of elimination
Alien Alarm Reset.
8. AL008 Abnormal Pulse Control Command
(1) Trigger conditions and causes of abnormal alarms
Condition: The input frequency of the pulse command exceeds the hardware interface tolerance.
Cause: Pulse command frequency is higher than the rated input frequency.
(2) Inspection and disposal
Check that the input frequency does not exceed the rated input frequency with a pulse frequency check meter and enter the pulse frequency correctly.
(3) Methods of elimination
Alien Alarm Reset.
9. AL009 Excessive Position Control Error
(1) Trigger conditions and causes of abnormal alarms
Condition: The error between the position command and position return is greater than the allowable setting value (P2.035).
Cause：
- The maximum position error parameter is set too small.
- The gain value is set too small.
- Torque limit or speed limit is too low.
- Excessive external load.
- The electronic gear ratio ratio is not set properly.
- The power cord is loose.
- The maximum speed limit is too low.
(2) Inspection and disposal
- Check the maximum position error setting value for the excessive position control error warning condition (P2.035), and increase the setting value if necessary.
- Check whether the gain value is appropriate according to the actual usage conditions.
- If the speed and torque limiting function is not needed, please turn off parameter P1.002; otherwise, please check whether the internal speed limiting (P1.009 ~ P1.011) and internal torque limiting (P1.012 ~ P1.014) setting values are correct.
- Check the external load and if necessary reduce the external load or re-evaluate the motor capacity.
- Check whether the ratio of P1.044 and P1.045 is appropriate according to the actual usage conditions and set the correct value.
- Check for loose power cords.
- Check that the maximum speed limit (P1.055) setting is not too low.
(3) Methods of elimination
Alien Alarm Reset.
10. AL010 Abnormal Voltage in Regenerative State
(1) Trigger conditions and causes of abnormal alarms
Condition: an error occurs during rebirth.
Cause：
- In the regeneration state, the regeneration voltage is maintained at 400V for a period of time. The cause may be that the regeneration resistor is wrongly selected or the external regeneration resistor is not connected.
- No regenerative resistor is used, but the user has not set the regenerative resistor capacity (P1.053) to zero.
(2) Inspection and disposal
- Confirm the connection status of the regeneration resistor and recalculate the value of regeneration resistor, reset the parameter values of P1.052 and P1.053 correctly, and if the alarm is still not lifted, please send the drive back to the factory.
- If no regenerative resistor is used, set the regenerative resistor capacity (P1.053) to zero.
(3) Methods of elimination
Alien Alarm Reset.
11. AL011 Position Detector Abnormal
(1) Trigger conditions and causes of abnormal alarms
Condition: The position detector generates an abnormal pulse signal.
Cause：
- Position detector wired incorrectly.
- Loose position detector connector.
- Bad position detector wiring.
- Encoder communication is disconnected due to interference.
- The position detector is damaged.
(2) Inspection and disposal
- Verify that the wiring is in accordance with the recommended wiring in the instruction manual and that the wiring is correct.
- Look for a loose CN2 and position detector connector on the drive. If loose, reinstall.
- Check whether there is any defective wiring or broken wires between the detector and the CN2 of the drive and the motor, and replace the connectors and wires if there are.
- Please monitor the encoder communication error rate P0.002 = -80, if this value will continue to accumulate, it means that there is interference, please check the following items: (a) Confirm whether the motor grounding terminal is indeed grounded, please connect the grounding terminal of the power cord (green) with the heat sink of the drive. (b) Make sure the encoder signal line is normal, and separate the encoder signal line from the power supply or high current line to avoid interference. (c) Use encoder cables with isolation mesh and pull out the isolation mesh wire to ground it properly.
- If all of the above checks have been completed and the alarm still cannot be eliminated, replace the motor.
(3) Methods of elimination
Re-energize to clear.
12. AL012 Calibration Anomaly
(1) Trigger conditions and causes of abnormal alarms
Condition: When performing electrical calibration, the calibration value exceeds the allowable value.
Cause：
- Analog input contacts are not properly zeroed.
- Detection of component damage.
(2) Inspection and disposal
- Measure whether the voltage of the analog input contact is the same as the ground potential.
- Power reset test; if reset is still abnormal, return drive to dealer or factory for service.
(3) Methods of elimination
Clear after removing CN1 wiring and performing auto-correct.
13. AL013 Emergency Stop
(1) Trigger conditions and causes of abnormal alarms
The emergency stop switch is pressed.
(2) Inspection and disposal
Verify that the emergency switch is off.
(3) Methods of elimination
EMGS Disarm automatically clears this alarm.
14. AL014 Reverse Limit Exception
(1) Trigger conditions and causes of abnormal alarms
Condition: The reverse limit switch is triggered.
Cause：
- The reverse limit switch is triggered.
- The servo system is not stable enough.
(2) Inspection and disposal
- Verify that the reverse limit switch is closed.
- Confirm the parameter settings or re-evaluate the motor capacity.
(3) Methods of elimination
Automatically clears when out of limits.
15. AL015 Positive Limit Anomaly
(1) Trigger conditions and causes of abnormal alarms
Condition: Positive limit switch is triggered.
Cause：
- The positive limit switch is triggered.
- The servo system is not stable enough.
(2) Inspection and disposal
- Verify that the positive limit switch is closed.
- Confirm the parameter settings or re-evaluate the motor capacity.
(3) Methods of elimination
Automatically clears when out of limits.
16. AL016 IGBT Temperature Abnormality
(1) Trigger conditions and causes of abnormal alarms
Condition: Abnormal IGBT temperature.
Cause：
- Exceeds the drive's rated load and is used continuously.
- Driver output shorted.
- The site ambient temperature is too low.
(2) Inspection and disposal
- Check if the load is too high or the motor current is too high, try to increase the motor capacity or reduce the load.
- Check that the drive outputs are wired correctly.
- The field temperature is below 0°C. The permissible ambient temperature is 0°C to 55°C.
(3) Methods of elimination
Alien Alarm Reset.
17. AL017 Memory Exception
(1) Trigger conditions and causes of abnormal alarms
Condition: Memory (EEPROM) access exception.
Cause：
- Parameter data is written abnormally or the parameter setting is out of the tolerance range.
- When power is supplied, the data in ROM is destroyed or there is no data in ROM.
(2) Inspection and disposal
Press the panel SHIFT key to display EXGAB.
X = 1, 2, 3
G = group code of the parameter
AB = number of the parameter hexadecimal code
If the panel displays E320A, it means the parameter is P2.010; if it displays E3610, it means the parameter is P6.016, please check the pen parameter.
- Press the SHIFT key on the panel to display the parameter code; if this alarm occurs during power up, it means that the value of a parameter is out of the setting range, and power up can be resumed after correcting it. If this alarm occurs during normal operation, it means that there is an error in writing the parameter, which can be cleared by DI.ARST.
- Press the SHIFT key on the panel to display E100X or E0001; if this alarm occurs when power is supplied, it is usually because the data in ROM is corrupted or there is no data in ROM, please send it back to the dealer or the original factory for repair.
(3) Methods of elimination
If it occurs on power-up, please reset the parameters before re-powering; if it occurs during operation, please carry out alien alarm reset.
18. AL018 Position Detector Output Abnormal
(1) Trigger conditions and causes of abnormal alarms
Condition: The detector output pulse frequency is higher than the hardware maximum output frequency.
Cause：
- Detector pulse resolution is set too high.
- The encoder cable suffers from stray wave interference or the cable is damaged, resulting in abnormal communication.
- The encoder is abnormal.
(2) Inspection and disposal
- Please set the parameters correctly, P1.076 and P1.046 must meet the conditions: browse here.
- Monitor the encoder communication error rate P0.002 = -80, if this value continues to accumulate, it indicates interference, please check the following items:
- To verify that the motor ground terminal is actually grounded, connect the ground terminal (yellow-green) of the power cord to the drive's heat sink.
- Make sure the encoder signal line is normal, and separate the encoder signal line from the power supply or high current line to avoid interference.
- Use encoder cables that contain an isolation mesh and pull out the isolation mesh wire for proper grounding.
- Check whether an encoder alarm (AL011, AL024, AL025, AL026) is generated along with the abnormal status log (P4.000 to P4.004). If an alarm occurs, check and troubleshoot the alarm.
- If OA/OB pulses are not required, set P2.065 [Bit 13] to 1 to turn off position detector output exception (AL018) detection.
(3) Methods of elimination
- Alien Alarm Reset.
- Please contact your dealer.
19. AL020 Serial Communication Timeout
(1) Trigger conditions and causes of abnormal alarms
Condition: RS-485 communication is abnormal.
Cause：
- The parameter of Modbus communication timeout setting (P3.004) is not set properly.
- The drive has not received a communication command for an extended period of time (refer to P3.004).
(2) Inspection and disposal
- Check the settings of the parameters related to communication overdue and set their parameter values correctly.
- Check for loose or broken communication wires and make sure they are wired correctly.
(3) Methods of elimination
Alien Alarm Reset.
20. AL022 Abnormal Main Circuit Power Supply
(1) Trigger conditions and causes of abnormal alarms
Condition: The main circuit power supply RST power cord may be loose or not energized. The exception type of this alarm is preset as Warning, if you want to set it as Alarm, you can set
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