Omron V680-CA5D01-V2 User Manual page 262

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.
TAT = Command transmission time + Tag communications time + Response transmission time
Command transmission time:
Tag communications time:
Response reception time:
Normal Commands
RDA1........... *CR
Tag
communications
Command
time
EXPANSION READ Command
(Command)
Host XRA1................. *CR
ID Controller
Tag
Command transmission
communications
time time
EXPANSION WRITE Command
(Command)
XWA1................. CR
Host
CR
ID Controller
(Response 1)
Command transmission 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. This
is the value found above.
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.
RD00123 ............... *CR
Response
TAT
(Delimiter)
(Delimiter)
CR
Frame 2
Frame 1
(Response 1)
(Response 2)
Response transmission time
TAT
.........*CR
.........CR
CR CR
(Response 2)
(Response n-1)
TAT
(Delimiter)
(Delimiter)
CR CR CR
Frame n
Frame n-1
(Response n)
(Response n-1)
XW00 *CR
(Response n)
Tag
Response
communications
transmission
time
time
SECTION 7
Appendices
RFID System
259
User's Manual