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9.6
Checking the LEDs
This section describes how to troubleshoot the system with the LEDs. Perform troubleshooting with the LEDs when
communication is disabled even after the CC-Link IE Field Network diagnostics has been carried out.
9.6.1
POWER LED
(1) When the POWER LED does not turn on
Is any LED other than the POWER LED on?
Is the module power supply (24VDC) wired?
Is the module power supply (24VDC) turned on?
Is the voltage of the module power supply (24VDC) within the
specified range?
9.6.2
LEDs of CC-Link IE Field Network
(1) When the RUN LED does not turn on
Does the voltage of the module power supplied externally
reach the voltage of the performance specifications?
Has any hardware failure or watchdog timer error occurred?
Is the startup mode switch still in the SET position?
(2) When the MODE LED flashes
Is the bridge module under the unit test?
(3) When the MODE LED turns off
Has any hardware failure occurred?
Check item
Check item
Check item
Check item
CHAPTER 9 TROUBLESHOOTING
Corrective action
If any LED other than the POWER LED turns on, the
possible cause is a hardware failure. Please consult your
local Mitsubishi representative.
Wire the module power supply (24VDC).
Turn on the module power supply (24VDC).
Set the voltage value within the range of performance
specifications.
Corrective action
If the RUN LED does not turn on even after the module
power supply is tuned off then on, the possible cause is a
hardware failure.
Please consult your local Mitsubishi representative.
Reset the startup mode switch from SET to the normal
position.
Corrective action
When the bridge module is under the unit test, completion of
the unit test turns on the D LINK LED on the CC-Link IE Field
Network side. Take a corrective action according to the result
of the unit test.
( Page 101, Section 9.8)
Corrective action
If the MODE LED does not turn on even after the module
power supply is turned off then on, the possible cause is a
hardware failure. Please consult your local Mitsubishi
representative.
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Table of Contents
Troubleshooting
