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A comprehensive list of 37 common Mitsubishi PLC error codes and their solutions.

2026-04-06 06:47:09 · · #1

1. Error code (D806*): 0000

Error message: NOERROR -- No exception or error occurred.

Abnormal content and cause: No abnormality occurred.

Solution: Please check if the connection between the host and the I/O expansion socket/module is normal.

2. Error code (D8061): 6101

Error message: PLCHARDWAREERROR (PLC hardware failure)

Error message: PLC stopped operating.

Error details and cause: RAM error

Solution: Please check if the connection between the host and the I/O expansion socket/module is normal.

3. Error code (D8061): 6102

Error message: PLCHARDWAREERROR (PLC hardware failure)

Error message: PLC stopped operating.

Cause of the error: Circuit error

Solution: Please check if the connection between the host and the I/O expansion socket/module is normal.

4. Error code (D8061): 6103

Error message: PLCHARDWAREERROR (PLC hardware failure)

Error message: PLC stopped operating.

Error message and cause: I/O Bus error. M8069 must be enabled first for the error to be effective.

Solution: Please check if the connection between the host and the I/O expansion socket/module is normal.

5. Error code (D8061): 6104

Error message: PLCHARDWAREERROR (PLC hardware failure)

Error message: PLC stopped operating.

Cause of the error: The I/O expansion socket is experiencing a 24V fault. M8069 must be turned ON first for the error to be effective.

Solution: Please check if the connection between the host and the I/O expansion socket/module is normal.

6. Error code (D8061): 6105

Error message: PLCHARDWAREERROR (PLC hardware failure)

Error message: PLC stopped operating.

Cause of the error: Watchdog timer malfunction.

Solution: Please check if the connection between the host and the I/O expansion socket/module is normal.

7. Error number (D8062): 6201

Error message: PLC/PPCOMMUNICATIONERROR (PLC/writer communication error)

Error message: Parity/FrameError

Solution: Please check if the connection between the host and the 20P or PC is normal.

8. Error code (D8062): 6202

Error message: PLC/PPCOMMUNICATIONERROR (PLC/writer communication error)

Error message: Abnormal communication phrase

Solution: Please check if the connection between the host and the 20P or PC is normal.

9. Error code (D8062): 6203

Error message: PLC/PPCOMMUNICATIONERROR (PLC/writer communication error)

Error message: Inconsistent communication data check

Solution: Please check if the connection between the host and the 20P or PC is normal.

10. Error code (D8062): 6204

Error message: PLC/PPCOMMUNICATIONERROR (PLC/writer communication error)

Error message: Communication string error

Solution: Please check if the connection between the host and the 20P or PC is normal.

11. Error code (D8062): 6205

Error message: PLC/PPCOMMUNICATIONERROR (PLC/writer communication error)

Error message: Communication command error.

Solution: Please check if the connection between the host and the 20P or PC is normal.

12. Error code (D8063): 6301

Error message: PARALLELLINKERROR (Parallel communication error)

Error message: Parity/FrameError

Countermeasures: Check if the power supplies to both PLCs are on, and whether the connection cables between the main unit and the parallel-operating modules are correctly connected.

13. Error code (D8063): 6302

Error message: PARALLELLINKERROR (Parallel communication error)

Error message: Abnormal communication phrase

Countermeasures: Check if the power supplies to both PLCs are on, and whether the connection cables between the main unit and the parallel-operating modules are correctly connected.

14. Error code (D8063): 6303

Error message: PARALLELLINKERROR (Parallel communication error)

Error message: Inconsistent communication data check

Countermeasures: Check if the power supplies to both PLCs are on, and whether the connection cables between the main unit and the parallel-operating modules are correctly connected.

15. Error code (D8063): 6304

Error message: PARALLELLINKERROR (Parallel communication error)

Error message: Communication string error

Countermeasures: Check if the power supplies to both PLCs are on, and whether the connection cables between the main unit and the parallel-operating modules are correctly connected.

16. Error code (D8063): 6305

Error message: PARALLELLINKERROR (Parallel communication error)

Error message: Communication command error.

Countermeasures: Check if the power supplies to both PLCs are on, and whether the connection cables between the main unit and the parallel-operating modules are correctly connected.

17. Error code (D8063): 6306

Error message: PARALLELLINKERROR (Parallel communication error)

Error message: Monitoring time exceeded

Countermeasures: Check if the power supplies to both PLCs are on, and whether the connection cables between the main unit and the parallel-operating modules are correctly connected.

18. Error code (D8063): 6312

Error message: PARALLELLINKERROR (Parallel communication error)

Error message: Parallel operation clause error.

Countermeasures: Check if the power supplies to both PLCs are on, and whether the connection cables between the main unit and the parallel-operating modules are correctly connected.

19. Error code (D8063): 6313

Error message: PARALLELLINKERROR (Parallel communication error)

Error message: Inconsistent parallel operation overall check

Countermeasures: Check if the power supplies to both PLCs are on, and whether the connection cables between the main unit and the parallel-operating modules are correctly connected.

20. Error code (D8063): 6314

Error message: PARALLELLINKERROR (Parallel communication error)

Error message: Parallel string execution error

Countermeasures: Check if the power supplies to both PLCs are on, and whether the connection cables between the main unit and the parallel-operating modules are correctly connected.

21. Error code (D8064): 6401

Error message: PARAMETERERROR (Incorrect parameter)

Error message: Program integration check inconsistency

Solution: Switch the PLC to STOP mode and check if the parameter settings are correct.

22. Error code (D8064): 6402

Error message: PARAMETERERROR (Incorrect parameter)

Error message: Memory capacity setting is incorrect.

Solution: Switch the PLC to STOP mode and check if the parameter settings are correct.

23. Error code (D8064): 6403

Error message: PARAMETERERROR (Incorrect parameter)

Error message: Incorrect power outage protection zone setting.

Solution: Switch the PLC to STOP mode and check if the parameter settings are correct.

24. Error code (D8064): 6404

Error message: PARAMETERERROR (Incorrect parameter)

Error message: Annotation area setting is incorrect.

Solution: Switch the PLC to STOP mode and check if the parameter settings are correct.

25. Error code (D8064): 6405

Error message: PARAMETERERROR (Incorrect parameter)

Error message: File temporary storage area is incorrectly set.

Solution: Switch the PLC to STOP mode and check if the parameter settings are correct.

26. Error code (D8064): 6409

Error message: PARAMETERERROR (Incorrect parameter)

Error message: Other settings are incorrect.

Solution: Switch the PLC to STOP mode and check if the parameter settings are correct.

27. Error code (D8065): 6501

Error message: SYNTAXERROR (PLC stopped operating, grammar error)

Error message: Incorrect combination of instruction and operand.

Solution: Please check whether each instruction in the program is used correctly.

28. Error code (D8065): 6502

Error message: SYNTAXERROR (PLC stopped operating, grammar error)

Error message: No OUTT or OUTC commands were specified before the set value.

Solution: Please check whether each instruction in the program is used correctly.

29. Error code (D8065): 6503

Error message: SYNTAXERROR (PLC stopped operating, grammar error)

Error message: No set value after OUTT,OUTC; Insufficient number of operands for the applied instruction.

Solution: Please check whether each instruction in the program is used correctly.

30. Error code (D8065): 6504

Error message: SYNTAXERROR (PLC stopped operating, grammar error)

Error message: Number P is used repeatedly; interrupt insertion input number and high-speed counting input number are used repeatedly.

Solution: Please check whether each instruction in the program is used correctly.

31. Error code (D8065): 6505

Error message: SYNTAXERROR (PLC stopped operating, grammar error)

Error message: The specified component is out of range.

Solution: Please check whether each instruction in the program is used correctly.

32. Error code (D8065): 6506

Error message: SYNTAXERROR (PLC stopped operating, grammar error)

Error message: Using an undefined instruction

Solution: Please check whether each instruction in the program is used correctly.

33. Error code (D8065): 6507

Error message: SYNTAXERROR (PLC stopped operating, grammar error)

Error message: P number is incorrect.

Solution: Please check whether each instruction in the program is used correctly.

34. Error code (D8065): 6508

Error message: SYNTAXERROR (PLC stopped operating, grammar error)

Error message: Number I is incorrect.

Solution: Please check whether each instruction in the program is used correctly.

35. Error code (D8065): 6509

Error message: SYNTAXERROR (PLC stopped operating, grammar error)

Error message: Other

Solution: Please check whether each instruction in the program is used correctly.

36. Error code (D8065): 6510

Error message: SYNTAXERROR (PLC stopped operating, grammar error)

Error message: Incorrect use of the N number in MC/MCR.

Solution: Please check whether each instruction in the program is used correctly.

37. Error code (D8065): 6511

Error message: SYNTAXERROR (PLC stopped operating, grammar error)

Error content interruption, insertion of input terminal number, and repeated use of high-speed counting input terminal number.

Solution: Please check whether each instruction in the program is used correctly.

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