Omron V680-CA5D01-V2 User Manual page 110

External Trigger Communications Designations (SI, RI, and PI)
The ID Controller communicates with a Tag on the rising edge of the TRG external input signal. These
designations can be used to accurately perform communications even on high-speed lines because
communications can be directly controlled with the output of a sensor that detects when Tags are in the
Antenna's communications area.
Tag
Antenna
Single Input Trigger Designation (SI)
With a single input trigger designation, processing is ended when the ID Controller has completed
communicating with the Tag.
Host device to Controller
Controller to host device
Between Controller and Tag
External input
Repeat Input Trigger Designation (RI)
A repeat input trigger designation causes the ID Controller to repeat the operation for a single input
trigger designation (SI). The ID Controller communicates with a Tag each time it detects the rising edge
or the TRG external input signal. The COMMAND PROCESSING TERMINATE command (AA) is used
to cancel processing.
SI Mode command
Host device to Controller
Controller to host device
Between Controller and Tag
External input
When the Controller receives a
command from the host device, it will go
on standby and wait for an input signal.
(A sensor is just one example of a
possible input device.)
When the input signal is received, the
Controller will communicate with the Tag
in the antenna's communications area.
If there is no Tag, a "no Tag" error will be
returned.
SI Mode command
Communi-
cations
Waiting for
input
Note: Response made even if there is no Tag.
Response
(See note.)
Communi-
cations
Waiting
Waiting for input
for input
To external input on ID Controller
Note: Response made even if there is no Tag.
Response
- Processing completed -
(See note.)
AA command
Response
(See note.)
Communi-
cations
SECTION 5
Communications
- Processing
Response
completed -
(Canceled)
RFID System
107
User's Manual