Omron CS Series Operator's Manual

Cycle Time and Time Section 9-2
189
Virtual Cycle Time
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.
Calculating Virtual Cycle
Time
In calculating the virtual cycle time, the followings are different from that of
the CS/CJ-series PLC.
Process name Process Contents Processing time and Fluctuation
factors
(1) Overseeing Processing Fixed Value 0.5 ms
(2) Computing Process Process instruction execution of the
user program in the UM1. The sum of
the execution time of instruction words.
The sum of the execution time of
UM1instruction words.
(3) Calculating the Mini-
mum Cycle Time"
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.
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.
(4) I/O refresh The accumulated I/O refresh time for
each Unit registered in PLC unit set-
tings.
I/O refresh time for each Unit mul-
tiplied by The number of Units
used.
(5) Peripheral servicing Not calculated in the virtual cycle time. 0 ms
Note Although some instructions have different process time depending on condi-
tions, the CX-Simulator calculates the cycle time with the process time on the
standard conditions.
I/O Refresh Time for Typical Basic I/O Units
Type Unit name Model I/O refresh time per
1 Unit
16-input-point Unit C200H-ID212 0.02 ms
16-output-point Unit C200H-OD212 0.03 ms
C200H Basic I/O Unit
Interrupt Input Unit C200HS-INT01 0.10 ms
32-point Input Unit C200H-ID216 0.10 ms
32-point Output Unit C200H-OD218 0.10 ms
64-point Input Unit C200H-ID217 0.20 ms
C200H Group2 High-density I/O Unit
64-point Output Unit C200H-OD219 0.13 ms
96-point Input Unit CS1W-ID291 0.02 msCS/CJ-series Basic I/O Unit
96-point Output Unit CS1W-OD291 0.02 ms
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Omron CS Series Specifications

General

Brand	Omron
Model	CS Series
Category	Network Hardware
Language	English