If The Module Ready Flag (Xn0) Does Not Turn On; If The Write Error Flag (Xn2) Has Turned On; If The Hardware Error Flag (Xn3) Has Turned On; If The Alert Occurrence Flag (Xnc To Xnf) Has Turned On - Mitsubishi Electric MELSECSystem Q User Manual

8 TROUBLESHOOTING

8.6 If the Module Ready Flag (Xn0) Does Not Turn ON

8.7 If the Write Error Flag (Xn2) Has Turned ON

8.8 If the Hardware Error Flag (Xn3) Has Turned ON

8.9 If the Alert Occurrence Flag (XnC to XnF) Has Turned ON

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Check item
Has a watchdog timer error occurred?
Has an error occurred in the PLC?
Check item
Has a write data error occurred?
Check item
Check item
Is the measured temperature error/alert set
value beyond the range?
Is a disconnection detected?
Corrective action
• Reset the PLC CPU or power it on again.
• Change the Q64TC.
• Refer to the used PLC CPU User's Manual
and take corrective action.
Corrective action
• Check the error code list in Section 8.1 and
correct the sequence program.
Corrective action
• Q64TC hardware fault.
Please consult your sales representative.
Corrective action
• Check the buffer memory address 5
and take action for the alert that occurred.
MELSEC-Q
to 8
H H
8 - 4