Omron V670 Series, Руководство пользователя

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4-1
Depending on an operation sequence, you can specify various communications through the communication command for communica-
tion with a tag. The following seven communication designations are available.
Those seven communication designations are classified into three groups; a command trigger system which starts the communication by
sending a command, auto system which detects a tag automatically and executes the communication, and input trigger system which
start the communication by external input.
According to this classification, the operation of every communication designation is described below.
4-1-1 Designation of Command Trigger System Communication (ST)
In the command trigger system communication designation, the communication with a tag is executed by sending a command and the
controller command processing is ended by terminating the communication. If the tag is not in the communication area when the com-
mand is sent, an error (error code: 72) is returned to indicate that there is no tag in the communication area. Therefore, you must check
the tag in the communication area with a sensor etc. and return a command.
ST designation:
Code Name Description
ST Single command Trigger When the command is received, the communication with the tag is executed and
the response is returned.
SA Single Auto command After the command is received, the communication is executed when a tag has
been detected in a communication area and the response is returned.
SI Single Input trigger After the command is received, the communication with the tag is executed at the
leading edge timing of external input (TRG) and the response is returned.
RA Repeat Auto command "SA" designation is repeated. The communication with the same tag, which
exists continuously, is executed only one time.
RI Repeat Input trigger "SI" designation is repeated.
PA Poling Auto command "SA" designation is executed and the response is returned by the polling query
(PC) command.
PI Poling Input trigger "SI" designation is executed and the response is returned by the polling query
(PC) command.
Tag
Antenna
The communication with tag in the
communication area is executed when
a command from a host is received.
So, if the tag is not in the communica-
tion area, the response is returned to
indicate that there is no tag in the com-
munication area.
Host → Controller
Host ← Controller
Controller
↔
Tag
(Tag action)
ST mode command
Response *
* Responds whether there is a tag or not.
Communication
End of process
Tag
Chapter 4 Functions
4-1 Communication Designation Function