47

V680 Series

TAT When Using an ID Controller (Reference Values)

TAT (Turn Around Time)

TAT refers to the total time required from the point at which a host device (such as a personal computer) starts sending a command until a response

is received.

Command send time:

This is the time required for sending a command from the host device to the Controller.

It varies depending on the communications speed and format.

RF Tag communication time: This is the time required for communication between the Antenna and the RF Tag.

Response receipt time:

This is the time required for returning a response from the Controller to the host device.

It varies depending on the communications speed and format.

• For an ordinary command

• Expansion Read Command

• Expansion Write Command

TAT = Command send time + RF Tag communication time + response

RDA1

CR

RD001234

CR

TAT

RF Tag

communication time

(Command)

Response

XRA1

CR

CR

CR

CR

CR

ID Controller

Host

TAT

(Command)

Command send time

Communications

time with Tag

Frame 1

(Response 1)

Frame 2

(Response 2)

Frame n-1

(Response n-1)

Frame n

(Response n)

(Delimiter)

(Delimiter)

(Delimiter)

(Delimiter)

Response reception time

XWA1

CR

CR

CR

CR

CR

CR

XW00 CR

ID Controller

TAT

(Command)

(Response 1)

(Response 2)

(Response n-1)

Host

Command send time

Communications

time with Tag

(Response n)

Response

reception time