Omron V640-HAM11-ETN User Manual page 113

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.
Host
Amplifier Unit
Time
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.
Communications time calculation formula (unit: ms)
READ: 156.3 × (number of pages) + 3.8
WRITE, SAME WRITE: 381.9 × (number of pages) + 160.1
BYTE WRITE: 385.4 × (number of pages/8) + 277.2
TAT calculation formula (units: ms)
TAT = command and response transmission time + communications time
*The command and response transmission time differs depending on the network environment.
For example: Command and response transemission time is about from 10 to 40msec, when
connect between PC and the Amplifier Unit directly by the lan cable(100M).
Command
Communications time
TAT
Description
Rounding up
SECTION 7
Appendix
Response
CIDRW System
User's Manual
111