Omron CS Series Operator's Manual page 204

Cycle Time and Time
Virtual Cycle Time
Calculating Virtual Cycle
Time
Process name
(1) Overseeing Processing Fixed Value
(2) Computing Process
(3) Calculating the Mini-
mum Cycle Time"
(4) I/O refresh
(5) Peripheral servicing
I/O Refresh Time for Typical Basic I/O Units
C200H Basic I/O Unit
C200H Group2 High-density I/O Unit
CS/CJ-series Basic I/O Unit
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The cycle time of the CX-Simulator is set as " virtual cycle time" in default.
The virtual cycle time is given by converting the time required for the Ladder
Engine to operate one cycle to the actual PLC cycle time.
In calculating the virtual cycle time, the followings are different from that of
the CS/CJ-series PLC.
Process instruction execution of the
user program in the UM1. The sum of
the execution time of instruction words.
Calculate the cycle time.
When "Minimum Cycle Time" is speci-
fied in the PLC Setup, if ((1)+(2)+(4)) is
smaller than the specified "Minimum
Cycle Time", it is regarded as the virtual
cycle time.
The accumulated I/O refresh time for
each Unit registered in PLC unit set-
tings.
Not calculated in the virtual cycle time.
Although some instructions have different process time depending on condi-
Note
tions, the CX-Simulator calculates the cycle time with the process time on the
standard conditions.
Type
16-input-point Unit
16-output-point Unit
Interrupt Input Unit
32-point Input Unit
32-point Output Unit
64-point Input Unit
64-point Output Unit
96-point Input Unit
96-point Output Unit
Process Contents
Unit name
C200H-ID212
C200H-OD212
C200HS-INT01
C200H-ID216
C200H-OD218
C200H-ID217
C200H-OD219
CS1W-ID291
CS1W-OD291
Section 9-2
Processing time and Fluctuation
factors
0.5 ms
The sum of the execution time of
UM1instruction words.
When "Minimum Cycle Time" is
not specified, the cycle time is 0
ms.
In "Minimum Cycle Time", there is
no waiting time and only the cycle
time is set.
I/O refresh time for each Unit mul-
tiplied by The number of Units
used.
0 ms
Model I/O refresh time per
1 Unit
0.02 ms
0.03 ms
0.10 ms
0.10 ms
0.10 ms
0.20 ms
0.13 ms
0.02 ms
0.02 ms
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