60
3 TROUBLESHOOTING
3.1 Troubleshooting with the LEDs
3
TROUBLESHOOTING
3.1
Troubleshooting with the LEDs
When the RUN LED turns off
When the ERR LED turns on
When the ALM LED turns on
When an I/O LED does not change
Check item
Action
Check whether power is supplied.
Check that the supply voltage to the power supply module is within the rated
range.
Check whether the capacity of the power supply module is enough.
Calculate the current consumption of mounted modules, such as the CPU
module, I/O modules, and intelligent function modules, to check that the
power capacity is enough.
Check whether the module is mounted properly.
Check the mounting state of the module.
Cases other than the above
Reset the CPU module and check that the RUN LED turns on.
If the RUN LED still remains off, the possible cause is a failure of the module.
Please consult your local Mitsubishi representative.
Check item
Action
Check whether any errors have occurred.
Check 'Latest error code' (Un\G2560), and take actions described in the list of
error codes.
Check item
Action
Check whether any alarms have occurred.
Check 'Latest alarm code' (Un\G2564), and take actions described in the list
of alarm codes.
Check item
Action
Check whether "Switching display of input status and alarm (1 second
intervals)" or "Always display abnormal occurrence points" is set in "LED
display setting when error occurred" of the input module with diagnostic
functions.
Check whether "Switching display of output status and alarm (1 second
intervals)" or "Always display abnormal occurrence points" is set in "LED
display setting when error occurred" of the output module with diagnostic
functions.
Check the current setting of "LED display setting when error occurred".
Содержание MELSEC iQ-RX40NC6B
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