LG MASTER-K 120S Series User Manual page 284

Chapter 11 Troubleshooting
11.2.4 Troubleshooting flowchart used when the I/O part doesn't operate normally.
The following flowchart explains corrective action procedure used when the I/O module doesn't operate normally.
When the I/O module doesn't work normally.
Is the indicator LED of
the P40 on?
Yes
Measure the voltage of power
supply in P40
Is the
voltage of power supply for load
applied?
Yes
Check the status of P40
No
.
Correct wiring
No
Is the output
No
wiring correct?
Yes
Separate the external wiring than check the condition of
output module.
Yes
Is it normal condition?
Replace the connector of the
terminal board
Is the
terminal connector
connector appropriate?
No
11-5
Check the status of P40 by
KGLWIN
No
Yes
Is it normal condition?
Replace the Unit
No
Yes
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