Specifications

3 - 20
(4) Checking the test result
The T.PASS LED of the network module flashes at approximately 0.5s intervals.
The T.PASS LED flashes when the test is normal, and the ERR. LED flashes
when an error occurs.
[Normal test result]
Switch position
Display section
Before test
(during RESET)
Test complete
Test is completed
when T.PASS
flashes 20 times
(approximately 10s).
During test
(during STOP)
[Abnormal test result]
Or L. ERR.
L
Switch position
Display section
Before test
(during RESET)
During test
(during STOP)
Test complete
Lighting of
the T.PASS LED and
flashing of the ERR.
LED indicate an error.
<Possible causes of errors>
1) Forward loop error
• The cable of the forward loop is disconnected.
• The sending and receiving stations of the forward loop are not
connected with a cable.
• The sending stations of the forward and reverse loops, or the receiving
stations of the forward and reverse loops are connected.
2) Reverse loop error
• The cable of the reverse loop is disconnected.
• The sending and receiving stations of the reverse loop are not
connected with a cable.
3) Defective cable
4) The cable was detached or broken during the test.
5) Hardware error