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Appendix 7. Explanation of Alarms
Appendix 7.5 System Alarms (Z)
Z65 Valid term has been expired
Details
The valid term has been expired with no decryption code input.
Remedy
- Obtain a decryption code by making a payment. Enter the decryption code.
Z67 CC-Link communication error
Details
A communication error occurred during CC-Link communication using CC-Link unit.
Remedy
- Refer to "List of Messages" in CC-Link (Master/Slave) Specification manual (BNP-C3039-
214).
Z68 CC-Link unconnected
Details
A cable between CC-Link unit and a device is disconnected or broken.
Remedy
- Connect the cable.
- Check for any broken cables.
Z69 External link error 2
Details
A FROM/TO instruction was used while the MELSEC-Q interface expansion module is not
installed.
Remedy
Install the MELSEC-Q interface expansion module.
Z69 External link error 3
Details
A negative value was set for an I/O No. in the FROM/TO instruction.
Remedy
Correct the I/O No.
Z69 External link error 4
Details
A negative value was set for transfer size in the FROM/TO instruction.
Remedy
Correct the transfer size.
Z69 External link error 5
Details
The number of FROM/TO instructions within one scan has exceeded 50.
Remedy
Correct the user PLC (ladder sequence) so that the number of FROM/TO instructions per
scan is 50 or less.
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