Mitsubishi Electric MELSEC-Q Series - Module Error Collection Function

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Chapter 14 Common Functions
14.9 Module error collection function
This function collects errors occurred in the Simple Motion module in the PLC CPU.
Those errors are stored in a memory (latch area) of the PLC CPU as module error logs.
The stored error logs are retained even when the PLC CPU is powered off or reset.
Time
Module in error
Error code
Module B
Error A1
Error B1
Error A2
GX Works2
3)
Error history display
Time
Module in error
Error code
Module B
Error A1
Error C1
Error B1
Error A2
1)
Module error log
19:33 Error C1
Error history
(CPU module)
2)
<Operation>
1) The error occurs in the PLC CPU or Intelligent function module.
2) The PLC CPU collects and stores the error in each intelligent function
module as "Module error history".
3) The list of error in PLC CPU or each intelligent function module error is
displayed with GX Works2.
Module B
CPU
19:29
QD77GF
19:34
19:36
QD77GF
19:29
QD77GF
19:34
19:36
QD77GF
19:33
CPU
QD77GF
19:29 Error A1 occurred!
19:36 Error A2 occurred!
19:33 Error C1 occurred!
19:34 Error B1 occurred!
Error history of PLC CPU and intelligent function
module is displayed in one screen.
Errors in the entire system can be monitored in reverse
chronological order.
For details on the module error collection function, refer to Section 16.1 "Checking
errors using GX Works2".