7-1 Turn Around Time and Communication Time
7-1
7-2
In the V720-series Reader/Writer, actual communications with a Tag are performed by reading
or writing four-byte data per page.
•
The following chart specifies the TAT (turn-around time) and actual communications time.
•
The actual communications time in the following chart is the time required for
communications between the Antenna and Tag, not including communications with the host.
Use this for calculating the speed of the Tag for the execution of auto commands.
Ex.)
7-1-1 Communication time in I.CODE1 mode
（
1
）
Communication time in Single Access Mode
●
Fast mode
●
Standard Mode
Calculation Formula
：
I.CODE1 Chip
Actual communications time (msec) N: Number of pages
processed
Communicatio
n time setting
Fast mode
Standard Mode
Special
reading
T = 1.3N + 6.2
T = 1.3N + 43.4
Read
T = 1.3N + 12.7
T = 1.3N + 91.6
Write
T = 13N +13.5
T = 54.2N + 90.0
Command Response
Actual
communications time
TAT
1
0
2
0
4
0
6
0
8
0
1
0
0
1
2
0
1
4
0
1
8
0
T
A
T
(
m
s
)
Number of pages processed
2
3
4
5
6
7
8
9
10
11
1
6
0
Writing
Reading
Special reading
1
0
20
40
60
80
100
120
140
180
Actual
communicat
ions time
(ms)
Number of pages processed
2
3
4
5
6
7
8
9
1
0
1
1
160
Writing
Reading
Special reading
1
0
1
0
0
2
0
0
3
0
0
4
0
0
5
0
0
6
0
0
7
0
0
8
0
0
Number of pages processed
2
3
4
5
6
7
8
9
10
11
Writing
Reading
Special reading
TAT(ms)
1
0
100
200
300
400
500
600
700
800
Actual
communicati
ons time
(ms)
Number of pages processed
2
3
4
5
6
7
8
9
1
0
11
Writing
Reading
Special reading
