Omron GRT1-CRT - 05-2008 Operation Manual page 110

Performance of Remote I/O Communications
ON (OFF) Delay Time for
I/O Units: T /T
IN OUT
Communications Cycle
Time of SmartSlice Bus:
T
SL
Data Processing Times for
CompoNet
Communications Unit:
T /T
SL-CI SL-CO
Communications Times
on the SmartSlice Bus:
T /T
SL-IN SL-OUT
T = T + T + T
MIN IN SL-IN
T + T + T
SL-CO SL-OUT OUT
CPU Unit
CompoNet
Master Unit
CompoNet
communications
cycle
CompoNet
Communications
Unit
Slice bus
T
SL-IN
T
Input Slave
IN
Output Slave
T : ON (OFF) delay time for Input Unit
IN
T : Communications time for input data on SmartSlice bus
SL-IN
T : Input data processing time for CompoNet Communications Unit
SL-CI
T : Minimum input processing time at CompoNet Master Unit
CrmInMax
T : Cycle time of CPU Unit
Cyc
T : Minimum output processing time at CompoNet Master Unit
CrmOutMax
T : Part of communications cycle time given to output frames
NetOut
T : Output data processing time for CompoNet Communications Unit
SL-CO
T : Communications time for output data on SmartSlice bus
SL-OUT
T : ON (OFF) delay time for Output Unit
OUT
SmartSlice I/O Units have different ON/OFF delay times.
Refer to the SmartSlice GRT1 Series SmartSlice I/O Units Operation Manual
(Cat. No. W455) for more information.
This is the time from communications with one SmartSlice I/O Unit until the
subsequent communications with the same SmartSlice I/O Unit.
T = 0.66
SL
+ (The total size of Word Input Units (in bytes) × 0.011)
+ (The total size of Bit Input Units (in bits) × 0.009)
+ (The total size of Word Output Units (in bytes) × 0.004)
+ (The total size of Bit Output Units (in bits) × 0.001) [ms]
These are the data processing times for the CompoNet Communications Unit.
The input data processing time and output data processing time are different.
= 0.71 + Total input size (in bytes) × 0.003 [ms]
T
SL-CI
= 0.2 + Total output size (in bytes) × 0.001 [ms]
T
SL-CO
These are the times for communications with a SmartSlice I/O Units. The
input data processing time and output data processing time are different.
= 0.01 × Input size (in bytes) [ms]
T
SL-IN
= 0.18 + Total Output size (in bytes) × 0.002 [ms]
T
SL-OUT
+ T + T
SL-CI CrmInMin Cyc
T
Cyc
T T
CrmInMin CrmOutMin
T
NetCyc
T
T
SL-Cl
Section 8-1
×2 + T + T
CrmOutMin NetOut
T
NetCyc
NetOut
T
SL-CO
T
SL-OUT
T
OUT
+
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