Troubleshooting With Leds; Run Led Is Flashing Or Turns Off; Err. Led Turns On - Mitsubishi Electric MELSEC-L Series LD40PD01 User Manual

14.4

Troubleshooting with LEDs

RUN LED is flashing or turns off

RUN LED is flashing
Check item
Is the simulation being executed?
RUN LED turns off
Check item
Has the power been supplied?
Is the capacity of the power supply module sufficient?
Has the module been properly connected?
Other than the above

ERR. LED turns on

Check item
Is there an error?
14 TROUBLESHOOTING
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14.4 Troubleshooting with LEDs
Action
Check that the RUN LED turns on after the completion of the simulation.
Action
Check if the voltage supplied to the power supply module is within the rated
range.
Calculate the total current consumption of the connected modules including
the CPU module, input/output modules, and intelligent function module to
check if the power capacity is sufficient.
Check if the module has been properly connected.
Reset the CPU module and check if the RUN LED turns on. If the RUN LED
still does not turn on, the possible cause is a failure of the module. Please
consult your local Mitsubishi representative.
Action
Check Latest error code (Un\G100) and take actions described in the
following section.
Page 238 List of Error Codes