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CIDRW System
User’s Manual
SE
C
TION
6
Chara
c
te
rist
ic Da
ta
Ac
cord
ing
to
Condition
s of Use
SECTION 6
Appendix
155
Communications Time
Regardless of whether SECS is used or not, take the time required for processing between the host
device and Amplifier Units into account when designing the system.
Communications time calculation formula (unit: ms)
READ: 138.7
×
(number of pages) + 10.0
WRITE, SAME WRITE: 379.8
×
(number of pages) + 145.4
BYTE WRITE: 383.0
×
(number of pages/8) + 249.0
TAT calculation formula (units: ms)
TAT = command and response transmission time + communications time
The command and response transmission time differs depending on the number of characters
sent and the communications conditions.
This calculation applies to continuous transmission in which the Controller uses no spaces
between command characters.
Example of TAT calculation:
Number of command characters: A; number of response characters: B
Baud rate: 9600 bps, data length: 8 bits, non parity, 1 stop bit
Time
Description
Communications time
This is the time required for communications between an ID Tag and the CIDRW Head.
TAT
This is the time required for processing at the Amplifier Unit, seen from the host device.
Host
Amplifier Unit
Command
Response
Communications time
TAT
Rounding up
Transmission time (ms) =
Number of bits per character (bits)
×
1000
Baud rate (bps)
×
total number of characters of command and response
TAT (ms) =
10
×
1000
9600
×
(A + B) + Communications time (ms)
Summary of Contents for V640-HS61
Page 14: ...12 INTRODUCTION Reading this Manual CIDRW System User s Manual INTRODUCTION MEMO...
Page 120: ...118 SECTION 5 When SECS Is Not Used CIDRW System User s Manual SECTION 5 Troubleshooting MEMO...
Page 171: ...CIDRW System User s Manual SECTION 6 Protective Construction SECTION 6 Appendix 169 MEMO...
Page 173: ......