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11.3
Checking the LEDs
This section describes how to troubleshoot the system by the LEDs.
For troubleshooting with the LEDs of the extension I/O module, refer to the following.
CC-Link IE Field Network Remote I/O Module User's Manual
(1) When the PW LED does not turn on
(2) When the RUN LED does not turn on
(3) When the MODE LED flashes
Check item
Action
Is any LED other than the PW LED turned on?
When any LED other than the PW LED turns on, a hardware failure may be
the cause. Please consult your local Mitsubishi representative.
Is the module power supply (24VDC) wired?
Wire the module power supply (24VDC).
Is the module power supply (24VDC) turned on?
Turn on the module power supply (24VDC).
Is the voltage of the module power supply (24VDC) within
the specified range?
Set the voltage value within the range of performance specifications.
Check item
Action
Does the voltage of the module power supplied externally
reach to the voltage of the performance specifications?
Check that module power supply voltage is within the range of performance
specifications. (
After the check, power off then on the module.
If the RUN LED does not turn on even after the module power supply is
turned off then on, a module failure may be the cause. Please consult your
local Mitsubishi representative.
Does any hardware error occur?
Check item
Action
Is the high-speed counter module in execution of the unit
test?
When the high-speed counter module is in execution of the unit test, the D
LINK LED turns on after the unit test is completed. Take corrective action
according to the result of the unit test. (
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