Omron V680 User Manual page 43

TAT (Turn Around Time)
"
TAT" is the total time from the start of command transmission by the host device (e.g., a personal computer) until
a response is received by the host device.
Command transmission time
TAT =
Command transmission time:
Tag communications time:
Response reception time:
• Normal Commands
(Command)
RDA1- - - - *CR
• EXPANSION READ Command
(Command)
Host device XRA1- - - - *CR
ID Controller
Command
transmission time
• EXPANSION WRITE Command
(Command)
Host device XWA1- - - - *CR
ID Controller
Tag communications time
+
The time required to send a command from the host device to the ID Controller.
The command transmission time varies depending on the baud rate and the
communications format.
The processing time for communications between the Antenna and Tag.
The time required to return a response from the ID Controller to the host device.
The response reception time varies depending on the baud rate and the
communications format.
RD001234- - - - *CR
Tag
Response
communications
time
TAT
(Delimiter)
Frame 1
Tag
(Response 1)
communications
time
- - - - -CR
CR CR
(Response 1) (Response 2)
Command transmission time
Communications Specifications
Response reception time
+
(Delimiter) (Delimiter)
CR CR CR
Frame 2
(Response 2)
Response reception time
TAT
- - - - -CR
CR
(Response n-1)
Tag
communications
time
TAT
Section 3
(Delimiter)
CR
Frame n
Frame n-1
(Response n-1) (Response n)
XW00*CR
(Response n)
Response
reception
time
RFID System
User's Manual
41