Tat Calculation - Omron CJ - 12-2004 Manual

Communications Time
Data Carrier Travel Speed
Data Carrier
6-3-2

TAT Calculation

92
The Data Carrier travel speed can be calculated using the following formula.
Travel speed = Travel distance in communications area/communications time
The communications time is given in the graphs on the previous page. The
travel distance in the communications area depends on the R/W Head and
the Data Carrier. Refer to the user manual for the R/W Head and Data Carri-
ers.
Travel distance in
communications area
R/W Head
Note 1. The travel speed will change with the communications distance and axis
displacement. We recommend using the widest part of the area.
2. The above calculation formula is provided only as a guideline. Perform
tests with the actual system before application.
3. Communications error processing is not included in the above calculation
formula.
The time from when the CS/CJ-series CPU Unit turns ON the ID Sensor Unit's
Command Execution Bit until the Data Carrier is communicated with and exe-
cution results are returned (i.e. the TAT, or Turnaround Time) can be calcu-
lated with the following formula.
TAT = Coefficient × Cycle time + Communications time
Name
Coefficient
Cycle time
Communications
time
Note Truncate the result of the Number of Processing Bytes/160.
Description
(Number of Processing Bytes/160) + 3 (See note.)
Cycle time of the CS/CJ-series CPU Unit
The communications time between the ID Sensor Unit and
Data Carrier (as previously described)
Section 6-3
Communications
area