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11
TROUBLESHOOTING
11.2
Troubleshooting
11.2.1
When "RUN" LED turns off
Table 11.4 When "RUN" LED turns off
Check item
Corrective action
Check that the supply voltage of the power supply module
Is power supplied?
is within the rated range.
Reference
section
Section
3.1
Calculate the current consumption of the CPU, I/O,
Is the capacity of the power supply module sufficient?
intelligent function and other modules mounted on the
base unit, and make sure that the capacity of the power
-
supply module is enough.
Reset the programmable controller CPU and check that
the "RUN" LED turns on.
Has a watchdog timer error occurred?
If the "RUN" LED does not turn on, the module may have
-
failed. Please consult your local Mitsubishi representative,
explaining a detailed description of the problem.
Is the module mounted correctly on the base unit?
Check the module mounting status.
Is the module in the online module change enable status?
Is "Empty" selected for the slot to be mounted in the I/O
assignment tab of the PLC Parameter box in GX Developer?
11.2.2
Refer to CHAPTER 10 and take corrective action.
Select "Intelli." for the type of the slot to be mounted again.
CHAPTER
10
Section
7.5.1
When "ERR" LED turns on or blinks
(1) When "ERR" LED turns on
Table 11.5 When "ERR" LED turns on
Check item
Corrective action
Check the error code with CH1 Latest error code
Has an error occurred?
(Un\G190) and Latest error code (Un\G1790), and then
take the corrective action as described in Section 11.1.
Reference
section
Section
11.1
(2) When "ERR" LED blinks
Table 11.6 When "ERR" LED blinks
Check item
Corrective action
Is the setting value of the intelligent function module "Switch 5"
Set "0H" for the intelligent function module "Switch 5" in
other than "0H"?
GX Developer.
11.2.3
Reference
section
Section
7.5.2
When "ALM" LED blinks
Table 11.7 When "ALM" LED blinks
Check item
Has an input signal error occurred?
11 - 5
11.2 Troubleshooting
11.2.1 When "RUN" LED turns off
Corrective action
Check CH1 Input signal error detection flag (Un\G114).
Reference
section
Section
6.23