Omron V670 Series, Руководство пользователя

Страница: 62 / 143

4-1 Communication Designation Function
4-2
4-1-2 Designation of Automatic System Communication (SA/RA/PA)
In the auto system communication designation, a tag is detected automatically. So, unlike the command trigger system, you do not need to check the tag.
SA designation:
For the single designation (SA), the controller command processing is ended by terminating the communication.
RA designation:
For the repeat designation (RA), the system waits until the next tag has come even after the communication is terminated. If the tag
once executes the communication, the tag does not execute the communication until it has moved out of the communication area.
Repeat processing is ended by a command process abort command (AA).
PA designation:
In the PA designation, similarly with RA, processing is repeated until the processing is terminated by a command process abort com-
mand (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.)
When the tag enters the communica-
tion area, the communication starts.
Tag
Antenna
Host → Controller
Host
←
Controller
Controller ↔ Tag
(Tag action)
SA mode command
Response
Communication
End of process
Tag
Host → Controller
Host
←
Controller
Controller ↔ Tag
(Tag action)
RA mode command
Response
Communication
A
End of
process
Tag A
Communication
B
Communication
C
Tag B Tag B
Response
Waiting for a tag Waiting for a new tag Waiting for a new tag
Response Response
AA command
Host → Controller
Host ← Controller
Controller ↔ Tag
(Tag action)
PA designation command
Response
Tag
Communication
Response
(Acceptance) (No communication)
Response
PC command PC command
(Result of communication)
End of process
Waiting for a tag