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5.5 Self-diagnostic Test
5.5.1 Self-loopback test
5
PREPARATORY PROCEDURES BEFORE
OPERATION
1) When three LEDs (F.LOOP, R.LOOP, and TIME) are turned ON
• A forward loop cable is disconnected
• The send side and receive side of forward loop are not connected by a
cable
• The send side of a forward loop and the send side of a reverse loop and
the receive side of a forward loop and the receive side of a reverse loop
are connected
2) When three LEDs (F.LOOP, R.LOOP, and DATA) are turned ON
• A reverse loop cable is disconnected
• The send side and receive side of a reverse loop are not connected by a
cable
3) When ERROR LED other than above 1) and 2) is turned ON
• Hardware failure
• A cable is disconnected during the test
• A cable is broken during the test