Troubleshooting with LEDs
RUN LED is flashing or turns off
RUN LED is flashing
Is the simulation being executed?
RUN LED turns off
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
Is there an error?
14.4 Troubleshooting with LEDs
Check that the RUN LED turns on after the completion of the simulation.
Check if the voltage supplied to the power supply module is within the rated
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.
Check Latest error code (Un\G100) and take actions described in the
Page 238 List of Error Codes