Troubleshooting
119
Doc No: UMAN\FL\0110
Rev. No.: 1.02B
8.1.5 Output Check
If the output status monitored on the programming tool is normal but the external output device (load) is not operated
normally, check the following points:
Is the output status LED
changed ON/OFF according
No to the program execution ?
Yes
Check the voltage between
the output terminal and its
common terminal.
Normal
If it is not normal, check the output cable
Check the voltage at the load connections.
If it is normal, check the specification of
the load, also check environmental factors.
Check the I/O allocation In force run mode, physical inputs and
table is identical to outputs are not updated.
the actual I/O configuration
Not identical
Execute the automatic I/O Download the application now and
allocation, and check whether execute the ladder.
the I/O allocation table is now
identical to the actual I/O
configuration
No
Check for faulty expansion
unit one by one
Replace the faulty expansion unit.
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