Omron G9SP Series Manual page 37

Sample Ladder Programming for Siemens PLC
This section provides an example of programming to monitor Safety Input terminal data of a
G9SP-series Controller from a Siemens Standard PLC.
RS-232C Serial Communications Sequence
The G9SP-series Controller returns a response to the command sent from the
Standard PLC.
Send processing
after 300 ms
Receive processing
Send processing
after 300 ms
Receive processing
3 - 2
Standard PLC
Initialization
Send processing
Sent command
Reception response
Send processing
Sent command
Reception response
Send processing
RS-232C Serial Communications
G9SP-series Controller
Send/receive processing
Send/receive processing
3
3-5