Omron ZS Command Reference Manual page 42

Example of Usage
(3) Check the following items, and press OK to complete the setting.
3.
Set the communication conditions for the ZS side.
(1) Set [System]-[Communication]-[RS-232C] as consistent with the above setting.
(2) Set [System]-[Communication]-[Protocol] as non-procedural.
4.
Change ZS into "RUN" mode.
5.
Perform non-procedural communication.
(1) Input a command, and then press the return key.
ZS-Series
40
Non-procedural Communication Command Reference