Maximum Cpu Occupancy And Execution Time - Omron CS Series Operator's Manual

Cycle Time and Time
Time
Minimum Cycle Time

9-2-2 Maximum CPU Occupancy and Execution Time

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For Step Run and Scan Run, time elapse during pausing is included in the
computer cycle time.
One step Wait One step
execute execute
Computer Cycle
·
Time
Timer
·
Pulse
·
Clock
·
When stood by (paused), the accumulated computer cycle time is different
Note
from the elapse clock time in the same period.
When Minimum Cycle Time is enabled in the computer cycle time, the Lad-
der Engine gets the scan to wait till the specified cycle time completes. If the
CPU occupancy is larger than the set value then, the CPU occupancy over-
rides the Minimum Cycle Time to set the wait time.
Set the following maximum CPU occupancy in the Maximum CPU Occupancy
of the [Status] | [Settings] | [PLC Clock Settings] dialog box.
Set the upper limit of the CPU occupancy of the Ladder Engine on the com-
puter as the maximum CPU occupancy. If the CX-Simulator responses slowly
in the window operation, reducing the CPU occupancy will decrease the CPU
occupancy of the Ladder Engine (60% in default).
On the contrary, if the computer cycle time is long, raising the CPU occu-
pancy may decrease the computer cycle time (The virtual cycle time is not
affected.) The setting of the CPU occupancy will be reflected from the next
cycle.
Wait One step Wait
execute
The actual time given by subtracting standby time
from one cycle time.
The standby time is added.
The standby time is added.
The standby time is added as the clock time (same
as the computer elapse time).
Section 9-2
One step
execute
Note: The dashed
line shows the
time elapse in
the virtual cy-
cle time.
Process