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(8) When the LINK LED turns off
Check item
Are Ethernet cables normal?
Do the switching hub and other stations in the system normally
operate?
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).
(9) When the ERR. LED turns on
Check item
Has any error occurred?
• Check that 1000BASE-T-compliant Ethernet cables are used. ( User's manual
for the master/local module used)
• Check that the station-to-station distance is 100m or less.
• Check that the Ethernet cables are not disconnected.
• Check that a 1000BASE-T-compliant switching hub is used. ( User's manual for
the master/local module used)
• Check that the power supplies of the switching hub and other stations are turned on.
Identify the error factor of the I/O module with the engineering tool to take the
corrective action. ( Page 235, Section 12.1)
CHAPTER 12 TROUBLESHOOTING
Action
Action
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Table of Contents
Troubleshooting
