10 TROUBLESHOOTING
10.2 Checking the LEDs
105
10
10.2
Checking the LEDs
This section describes how to troubleshoot the system by the LEDs.
When the PW LED does not turn on
When the PW LED does not turn on, check the following items.
When the RUN LED does not turn on
When the RUN LED does not turn on, check the following items.
When the RUN LED flashes
When the RUN LED flashes, check the following items.
Check item
Action
Is any LED other than the PW LED on?
When any LED other than the PW LED is 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 module power supply voltage (24VDC) within the range of performance
specifications. (
Page 19 Performance Specifications)
• After performing the above action, power off and on the module power supply
(24VDC). If the PW LED does not turn on even after the module power supply
(24VDC) is powered off and on, the possible cause is a safety remote I/O module
failure or the activation of the overvoltage protection function. Please consult your
local Mitsubishi representative.
Check item
Action
Has the voltage of the module power supplied externally reached the
voltage of the specifications?
• Check that module power supply voltage is within the range of performance
specifications. (
Page 19 Performance Specifications)
• After performing the above action, power off and on the module power supply
(24VDC). If the RUN LED does not turn on even after the module power supply
(24VDC) is powered off and on, the possible cause is a safety remote I/O module
failure. Please consult your local Mitsubishi representative.
Has any hardware failure occurred?
Power off and on the module power supply (24VDC). If the RUN LED does not turn on
even after the module power supply (24VDC) is powered off and on, the possible
cause is a safety remote I/O module failure. Please consult your local Mitsubishi
representative.
Check item
Action
Is the safety remote I/O module in execution of the unit test?
When the safety remote I/O module is in execution of the unit test, the RUN LED turns
on after the unit test is completed. Take corrective action according to the result of the
unit test.
When a unit test is not conducted, set the IP address setting switch to an appropriate
value. (
Summary of Contents for CC-Link IE-NZ2GNSS2-16DTE
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