Specifications

3 - 2
3.2 Component Names and Settings of Network Module (QJ71LP21–25)
3) LED displays
1) STATION No. (factory default setting: 1)
This switch sets the station number on the same network.
The red ERR.LED lights up for a setting error.
2) MODE (factory default setting: 0)
This switch sets the operation mode.
4) IN/OUT connectors
Connected with an optical fiber connector.
(IN connector)
For forward loop receiving/reverse loop sending
(OUT connector)
For forward loop sending/reverse loop receiving
Optical loop module
(1) Explanations of part names and settings
Number Name Description
Set the station number of the network module in the network using the STATION No.
switches. The upper switch is for setting tens digit, and the lower switch for setting ones
digit.
Setting Description
0 Setting error
1 to 64 Valid setting range
1)
65 to 99 Setting error
The operation mode of the network module can be selected. Set to Online (setting 0 or
4) after the standalone check (self-loopback test, internal self-loopback test, and
hardware test) of the network module is completed.
Setting Description Setting Description
0 Online
(Mode selected with
a network parameter
becomes valid.)
4 Online
(Mode selected with a
network parameter
becomes valid.)
1 Self-loopback test 5 Self-loopback test
2 Internal
self-loopback test
6 Internal self-loopback
test
3 Hardware test
When
10Mbps
in use
7 Hardware test
When
25Mbps
in use
2)
8 to F Use prohibited