Omron V680-CA5D01-V2 User Manual page 108

Auto Communications Designations (SA, RA, and PA)
With an auto communications designation, the ID Controller communicates with Tags that are automat-
ically detected. When the ID Controller receives the command from the host device, it automatically
detects and communicated with any Tag that enters the Antenna's communications area.
Tag
Antenna
Single Auto Designation (SA)
With a single auto designation, the ID Controller communicates with the Tag, returns a response to the
host device, and then enters command standby status.
Host device to Controller
Controller to host device
Between Controller and Tag
(Tag movement)
Repeat Auto Designation (RA)
A repeat auto designation causes the ID Controller to repeat the operation for a single auto designation
(SA). Once the ID Controller has communicated with a Tag, it will not communicate again with the
same Tag until the Tag leaves the Antenna's communications area. The COMMAND PROCESSING
TERMINATE command (AA) is used to cancel processing.
RA Mode
Host device to Controller
command
Controller to host device
Between Controller and Tag
(Tag movement)
Communications start when the
Tag enters the antenna's
communications area.
SA Mode command
Communi-
cations
Tag
Re-
sponse
Waiting for Tag
Waiting for
new Tag
Communi- Communi-
cations A cations B
Tag A
- Processing completed. -
Response
AA
command
Re- Re-
sponse sponse
Waiting for
new Tag
Communi-
cations C
Tag B Tag C
SECTION 5
Communications
Processing
Re-
sponse
completed.
RFID System
105
User's Manual