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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
For the troubleshooting using the LEDs of the extension D/A module, refer to the following:
CC-Link IE Field Network Digital-Analog Converter Module User's Manual
11.4.1 Main A/D converter module
(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?
If any LED other than the PW LED turns on, the hardware failure is a possible 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) supplied? Supply the module power supply (24VDC).
Does the voltage of the module power supply (24VDC) conform to the
specified range?
Adjust the voltage value to conform to 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?
Verify that the voltage of the module power supply lies in the range of performance
specifications. ( Page 25, Section 3.2)
After the check, turn off and on the module power supply.
If the RUN LED does not turn on even after the module power supply is turned from off
to on, the failure of the module is a possible cause. Please consult your local
Mitsubishi representative.
Does any hardware error occur?
Check item Action
Is the main A/D converter module in the unit test?
If the A/D converter module is in the unit test, the MODE LED turns off after the unit
test is completed. Take corrective action according to the result of the unit test.
( Page 185, Section 11.5)
Check item Action
Is the main A/D converter module in offset/gain setting mode?
When the A/D converter module is in the offset/gain setting, change the mode to the
normal mode after the setting is completed.
Does any hardware error occur?
If the MODE LED does not turn on even after the module power supply is turned from
off to on, the hardware failure is a possible cause. Please consult your local Mitsubishi
representative.
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