When The Link Led Turns Off - Mitsubishi Electric QJ71GF11-T2 User Manual

(7) When the LINK LED turns off

Check item
Are 1000BASE-T-compliant Ethernet cables used?
Is the station-to-station distance 100m or less?
Does the cabling condition (bend radius) meet the
specification?
Is any Ethernet cable disconnected?
Are the switching hub and other stations connected to the
master/local module normal?
If the above actions do not solve the problem, perform the following tests on the master/local module to check for an
error.
• Hardware test (
• Self-loopback test (
• Cable test (
Replace the cables with 1000BASE-T-compliant Ethernet cables.
(
Change the station-to-station distance to 100m or less.
Refer to the manual for the Ethernet cable, and correct the bend radius.
Replace the Ethernet cable.
Power on the switching hub and the other stations.
Page 64, Section 6.2.1)
Page 66, Section 6.2.2)
Page 78, Section 6.4.2)
CHAPTER 12 TROUBLESHOOTING
Action
Page 59, Section 5.3.1)
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