Omron G9SP Series

2 - 2 RS-232C Serial Communications
2-5
2
Connecting to Mitsubishi Electric PLCs
Communications cable
The suited cable is different according to the combination of component. Please
produce the cable of the following connecting wires when connecting with a
Mitsubishi Electric Standard PLC Q series (QJ71C24N-R2).
G9SP-series
RS-232C Serial Communications
Board
Mitsubishi Electric Q series
serial communication module
Connector Signal Pin No. Pin No. Signal Connector
FG 1 1 CD
SD 2 2 RD
RD 3 3 SD
RS 4 4 ER
CS 5 5 SG
5V 6 6 DR
DR 7 7 RS
ER 8 8 CS
D-Sub
male
9-pin
SG 9 9 RI
D-Sub
male
9-pin
Sample Ladder Programming for Mitsubishi Electric PLC Q series
This section provides an example of programming to monitor Safety Input terminal
data of a G9SP-series Controller from a Mitsubishi Electric Standard PLC Q
series.
z RS-232C Serial Communications Sequence
The G9SP-series Controller returns a response to the command sent from the
Standard PLC.
Standard PLC G9SP-series Controller
Send processing
Initialization
Send/receive processing
Send/receive processing
Sent command
Reception response
Sent command
Reception response
Receive processing
Send processing
Receive processing
Send processing
Receive processing
after 300 ms
Receive processing
after 300 ms
Receive End
Receive End