Mitsubishi Melsec-L Series User Manual page 72

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Item When the "Current Value" is 1 (ON)
Error in the CPU module.
Insufficient power supply capacity.
Module is not connected correctly.
CH C/N
Error in the cable, CPU module, or
the C24.
CH1: CH1 side communication error
CH ERR.
CH2: CH2 side communication error
6 SETTING AND WIRING
Corrective action
Remove errors in the CPU module.
Examine the power supply capacity.
Reinstall the module properly.
Check each module and remove the
cause of the error.
Reconnect the cable correctly.
Reinstall the module properly.
Reconnect the cable correctly.
Examine the test wiring connection.
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