Omron V670 Series, Руководство пользователя

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4-1 Communication Designation Function
4-4
PI designation:
In the polling designation (PI), similarly with RI, processing is repeated until the processing is terminated by a command process abort
command (AA). However, no response is made after the communication with one tag is ended. Response is returned by a polling query
(PC) command instead. Use this designation when several controllers are connected to a host device through RS-485 etc. (Commercial
232C/485 converter is required.)
Correct Usage
To use the communication designation of SI, RI and PI, turn ON (trigger input) the dip switch 3-1.
Host
→
Controller
Host ← Controller
Controller ↔ Tag
External input
PI designation command
Response*
Communication
End of process
Waiting for input
PC command PC command
(Acceptance)
Response*
(No communication)
Response*
(Result of communication)