Chapter 13 Warning CodesC2000 Plus
ID No. Display on LCD Keypad Warning Name Description
56
Checksum error
(PLSn)
PLC checksum error
Action and Reset
Action condition PLC checksum error is detected after power on, then PLSn warning shows
Action time Immediately displays when the fault is detected
Warning setting parameter NA
Reset method
Check if the program is correct and re-download the program. If the
not exist, the warning automatically clears.
Reset condition N/A
Record N/A
Cause Corrective Actions
The program detects checksum
error during PLC operation
1. Disable PLC
2. Remove PLC program (Pr.00-02=6)
3. Enable PLC
4. Re-download PLC program
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