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7-1 Turn Around Time and Communication Time
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.)
Command
7-1-1 Communication time in I.CODE1 mode
（1）Communication time in Single Access Mode
●Fast mode
1 8 0
T A T
( m s )
1 6 0
1 4 0
1 2 0
1 0 0
8 0
6 0
4 0
2 0
0
1
2
3
Number of pages processed
●Standard Mode
TAT(ms)
8 0 0
7 0 0
6 0 0
5 0 0
4 0 0
3 0 0
2 0 0
1 0 0
0
1
2
Number of pages processed
Calculation Formula：I.CODE1 Chip
Communicatio
n time setting
Special
reading
Read
Write
7-2
Actual
communications time
TAT
Writing
Reading
Special reading
4
5
6
7
8
9
10 11
Writing
Reading
Special reading
3
4
5
6
7
8
9
10 11
Actual communications time (msec)
Fast mode
T = 1.3N + 6.2
T = 1.3N + 12.7
T = 13N +13.5
Response
180
Actual
160
communicat
140
ions time
(ms)
120
100
80
60
40
20
0
1
2
3
Number of pages processed
Actual
800
communicati
700
ons time
(ms)
600
500
400
300
200
100
0
1
2
N: Number of pages
processed
Standard Mode
T = 1.3N + 43.4
T = 1.3N + 91.6
T = 54.2N + 90.0
Writing
Reading
Special reading
4
5
6
7
8
9
1 0 1 1
Writing
Reading
Special reading
3
4
5
6
7
8
9
Number of pages processed
7-1
1 0 11
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