Chapter 9 Diagnosis function
9-2
9.1.2 Procedure of Loop-Back self diagnosis
Procedure of Loop-Back self diagnosis is as follows.
1) Let RS-232C/RS-422 channels connected respectively as shown in [Figure 9.2] & [Figure 9.3].
2) Set operation mode setting switch to Loop-Back Test mode.
3) After self-diagnosis is started as powered on, check LED display per channel if normal or not.
4) Self-diagnosis will be repeated until powered off.
[Figure 9.2] RS-232C cable connection
Cnet (9-PIN)
Pin No.
Name
Connection No. and Signal direction
1 CD
2 RXD
3 TXD
4 DTR
5 SG
6 DSR
7 RTS
8 CTS
9 RI
[Figure 9.3] RS-422 cable connection
Cnet
Pin No.
Name
Cable connection
1 RDA
2 RDB
3 SDA
4 SDB
5 S.G
6 F.G