Omron G9SP Series

3 - 2 RS-232C Serial Communications
3-5
3
Connecting to Siemens PLCs
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.
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
Sent command
Reception response
Send processing
after 300 ms
Send processing
Send/receive processing
Initialization
Receive processing
Sent command
Reception response
Send/receive processing
Send processing
Send processing
Send processing
after 300 ms
Receive processing