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David FreemanJul 30, 2025
Why is the ERROR/ALARM LED flashing on my Panasonic Control Unit?
- GgmooreJul 30, 2025
If the ERROR/ALARM LED is flashing, use the programming software to check the error code. In online mode, monitor the PLC status, or find the error code in the 'Self-diagnostic error' section. You can also try to clear the error by choosing [Clear] in the 'PLC status' dialog while in PROG mode. Another solution is to turn the power supply off and on while in PROG mode, which clears the operation memory (except hold type data). Finally, you can execute the self-diagnostic error set instruction F148_ERR.