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CHAPTER 11 TROUBLESHOOTING
11
11.4 Checking the LEDs
11. 4 Checking the LEDs
This section describes how to troubleshoot the system by the LEDs.
For the troubleshooting using 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
(4) When the MODE LED turns off
Check item Action
Is any LED other than the PW LED turned on?
When any LED other than the PW LED turns on, the possible cause is a
hardware failure. 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 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.
( Page 25, Section 3.2)
After the check, power on the module.
If the RUN LED does not turn on even after the module power supply is
turned from off to on, the possible cause is a module failure. Please consult
your local Mitsubishi representative.
Does any hardware error occur?
Check item Action
Is the D/A converter module in execution of the unit test?
When the D/A converter 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.
( Page 148, Section 11.5)
Check item Action
Is the D/A converter module in the offset/gain setting mode?
When the D/A converter module is in the offset/gain setting, change the
mode to the normal mode after the offset/gain setting is completed.
Does any hardware error occur?
If the MODE LED does not turn on even after the module power supply is
turned on from off, the possible cause is a hardware failure. Please consult
your local Mitsubishi representative.