Chapter 6 CPU Functions
6- 4
6.3 Self-diagnosis Function
6.3.1 Saving of error log
CPU module logs errors occurred so that the causes will be identified and fixed easily. Clicking
『Error/Warning』 of 『Online』 shows the current error and previous error log.
Display the current error/warning.
Display a log of error/warning occurred.
(1) Saved data are not deleted until selecting a menu of XG5000 and clicking “Delete”.
6.3.2 Troubleshooting
(1) Trouble types
Trouble occurs due to PLC itself, system configuration error or abnormal operation result detected. Trouble
is divided into trouble mode stopping operation for the safety and warning mode generating alert to user
with a mode in trouble.
The causes troubling PLC system are as follows.
PLC hardware trouble
System configuration error
Operation error while operating user program
Error detected owing to external device in trouble
(2) Operation mode if trouble occurs
PLC system logs any trouble occurred in flag and determines whether to stop or resume operation
depending on trouble mode.
(a) PLC hardware trouble
In case an error occurs so that PLC such as CPU module and power module may not work normally,
the system is halted, but any warning may not interfere with the operation.
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