When Run Led Of Slice Module Is Off - Mitsubishi MELESEC-ST User Manual

12 TROUBLESHOOTING

12.1.2 When RUN LED of slice module is off

RUN LED is off.
Among the slice
modules, is there any power
distribution module whose
RUN LED is off?
YES
Is the SYS. LED of
that power distribution
module on?
YES
Change the power distribution module. *1
Has the RUN LED turned on?
YES
Completed
*1 When the RUN LEDs of multiple modules are off, replace them in order starting from the one on the left end.
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When the RUN LED of any slice module is off, troubleshoot according to the following
flowchart.
NO
Change the slice module whose RUN
LED is off. *1
NO
supplied from the external system
NO
Change the base module.
Is the RUN LED on?
Is 24VDC power
power supply?
YES
YES
MELSEC-ST
NO
Supply 24VDC power from the external
system power supply.
NO
Please contact your local Mitsubishi
service center or representative,
explaining a detailed description of the
problem.
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