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Cycle Time and Time
Section 9-2
197
Calculating Computer Cycle
Time
In calculating the computer cycle time, the followings are different from that of
the CS/CJ/CP-series CPU Unit.
Process name
Process Contents
Processing time and Fluctuation
factors
(1) Overseeing Proc-
essing
Back up the I/O memory areas
Time for I/O memory areas back-up
(2) Computing Process Process instructions of the user program in
UM1 and UM2. Sum of the execution time
of instructions.
Sum of the instruction execution
time for UM1 and UM2
(3) Minimum Cycle Time
Calculation
Calculate the cycle time.
Enabling "Minimum Cycle Time" in PLC
Setup will wait for the cycle time to com-
plete with WDT resetting.
Approximate to 0 for the time when
Minimum Cycle Time is not set.
The additional time for Minimum
Cycle Time = The cycle time
specified as Minimum Cycle Time -
The computer cycle time
((1)+(2)+(4)+(5))
(4) I/O Refresh
Not processed in the computer cycle time. 0 ms
(5) Peripheral Servicing An event service with the CS/CJ-series
Special I/O Unit, targeting the Network
Communications Unit and the Serial
Communications Unit.
Note:
I/O refresh is not included.
All of the services that occurred in
the cycle are executed regardless
of the setting of Fixed Peripheral
Servicing Time" of PLC Setup.
Computer cycle time = (1)
+
(2)
+
(3)
+
(5)
Note
The computer cycle time may greatly fluctuate depending on the execution
environment such as file access and memory swapping.
Time Elapse in Computer
Cycle Time
The time elapse when Continuous Run in the computer cycle time is the same
as that on the computer.
Time
One step
execute
One step
execute
One step
execute
One step
execute
Process
Note: The dashed
line shows
the time
elapse in the
virtual cycle
time.
Summary of Contents for CX-Simulator 1.9
Page 1: ...Cat No W366 E1 10 CX Simulator Ver 1 9 SYSMAC WS02 SIMC1 E OPERATION MANUAL...
Page 2: ......
Page 3: ...SYSMAC WS02 SIMC1 E CX Simulator Ver 1 9 Operation Manual Revised December 2009...
Page 24: ...xxv...
Page 30: ...xxxi...
Page 35: ...xxxvi...
Page 39: ......
Page 63: ...Comparison of the CX Simulator and SYSMAC CS CJ series PLCs Section 1 6 24...
Page 75: ...Installing and Uninstalling the Software Section 2 1 36...
Page 157: ...Task Debugging Section 4 4 118...
Page 195: ...Connection with Application Programs Section 7 2 156...
Page 225: ...Checking the Result Section 8 5 186...
Page 277: ...Other Functions Section 9 4 238...
Page 289: ...Other Tips for Troubleshooting Section 10 3 250...
Page 304: ......
Page 305: ......