Chapter 15 Troubleshooting
15-2
•
No input to WL
In this status, both the MS and NS LED of the slave are lit in green
•
No output from WL
In this status, both the MS and NS LED of the slave are lit in green
Replace faulty parts if spare parts are
available.
Contact Hitachi’s Service Dept.
Is the input LED lit?
Check the input voltage.
Check the input wiring.
NO
YES
Is IO mapping correct?
Check the mapping from the
configurator.
NO
YES
Is the node status normal?
Check the applicable node status
in the special internal output.
NO
YES
Replace faulty parts if spare parts are
available.
Contact Hitachi’s Service Dept.
Is the output LED lit?
Check the output voltage
Check the power supply voltage used
for the load.
Check the external wiring.
YES
NO
Is IO mapping correct?
Check the mapping from the
configurator.
NO
YES
Is the node status normal?
Check the applicable node status
in the special internal output.
NO
YES