Mitsubishi Electric NZ2GFCE-60DAV8 User Manual page 99

When the LINK LED turns off
Check item
Are Ethernet cables normal?
Do the switching hub and other stations used in the system operate
normally?
If link-up processing is repeated due to a condition of a device on the line, it may take a longer time for the
LINK LED to turn on. This phenomenon may be eliminated by changing the module PORT into which the
Ethernet cable is connected (example: PORT1  PORT2).
For the wiring of Ethernet cable, refer to the following.
Page 37 Wiring of Ethernet cable
When the ERR. LED turns on
Check item
Does any error occur?
When the ALM LED turns on or flashes
■When ALM LED turns on
Check item
Has an alert been output in the D/A converter module?
■When the ALM LED flashes
Check item
Has an out-of-range digital value error occurred in the D/A converter
module?
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Action
• Check if 1000BASE-T-compliant Ethernet cables are used.
 User's manual for the master/local module used
• Check if the station-to-station distance is 100m or less.
• Check if the Ethernet cables are not disconnected.
Check if the power supplies of the switching hub and other stations are turned on.
Action
Identify the error factor of the D/A converter module with the engineering tool to take
corrective action.
Page 89 How to Check Error Codes and Alarm Codes
Action
Check Alert output flag (RWrA).
Action
Check Set value check code (RWr2 to RWr9) of the corresponding channel.
10 TROUBLESHOOTING
10.4 Checking the LEDs
10
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