Omron V600 Series User Manual page 158

Section 7
Appendix
■ TAT (Turn Around Time)
• The TAT depends on the type of Data Carrier being used (with or without a built-in battery).
• The TAT of Data Carriers without batteries also depends on the communications mode setting.
• The TAT is the total time required for the host device to receive a response after it has finished send-
ing a command.
TAT = Command send time + Data Carrier communications time + Response reception time
Command send
time
Data Carrier
communications
time
Response reception
time
 Normal Commands
RDA1
 EXPANSION READ Command
XRA1
Host device
ID Controller
Command send time
 EXPANSION WRITE Command
XWA1
Host device
ID Controller
RFID System
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Operation Manual
: The time required to send a command from the host device to the ID Controller.
The command send time depends on the baud rate and communications
format.
: The time required for communications processing between the Read/Write
Head and Data Carrier. Refer to the next page to find the values.
: The time required to return a response to the host device from the ID
Controller. The command send time depends on the baud rate and
communications format.
Communica-
CR RD001234
tions time with
Command
Response
Data Carrier
TAT
Command
CR
Frame 1
Communica-
Response
tions time with
frame 1
Data Carrier
Command
CR CR
CR CR
Response Response
frame 1 frame 2
Command send time
CR
Delimiter Delimiter
Delimiter
CR CR CR
Frame 2
Response
frame 2
Response reception time
TAT
CR
CR XW00 CR
Response
Communica-
Response
frame n
tions time with
frame n-1
Response re-
Data Carrier
ception time
TAT
Delimiter
CR
Frame n-1 Frame n
Response Response
frame n-1 frame n