Checking By The Leds - Mitsubishi Electric NZ2GF2S-60MD4 User Manual

10.4

Checking by the LEDs

This section describes how to troubleshoot the system by the LEDs.
When the PW LED does not turn on
Check item
Is any LED other than the PW LED turned 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?
When the RUN LED does not turn on
Check item
Does the voltage of the module power supplied externally reach to the voltage
of the specifications?
Does any hardware failure occur?
When the MODE LED flashes
Check item
Is the multiple input module in execution of the unit test?
When the D LINK LED turns off
Check item
Does the own station in network operate normally?
Are 1000BASE-T-compliant Ethernet cables used?
Is the station-to-station distance 100m or less?
Does the cabling condition (bending radius) meet the specifications?
Is any Ethernet cable disconnected?
Do other stations connected to the multiple input module normally operate?
Does the switching hub normally operate?
Is the station number of the multiple input module duplicated with any of other
stations?
10 TROUBLESHOOTING
100
10.4 Checking by the LEDs
Action
When any LED other than the PW 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.
Action
Check that module power supply voltage is within the range of performance
specifications. ( Page 15 Performance Specifications)
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
off and on, the possible cause is a module failure. Please consult your local
Mitsubishi representative.
Action
When the multiple input module is in execution of 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 103 Unit Test)
Action
Connect the engineering tool to the master station, and then check that a data
link is established in the own station by using CC-Link IE Field Network
diagnostics. ( User's manual for the master/local module used)
Replace the cable with a 1000BASE-T-compliant Ethernet cable. ( User's
manual for the master/local module used)
Change the station-to-station distance to 100m or less.
Refer to the manual for the Ethernet cable used, and correct the bending
radius.
Replace the Ethernet cable.
Check that the power supplies of the other stations are turned on.
• Check that a 1000BASE-T-compliant switching hub is used. ( User's
manual for the master/local module used)
• Check that the power supply of the switching hub is turned on.
Two or more stations are duplicated.
Change the setting so that all the station numbers are different.