Scheduled Interrupts; Overview - Omron CP1E CPU UNIT SOFTWARE User Manual

10 Interrupts

10-3 Scheduled Interrupts

Scheduled interrupts can be used with any model of CP1E CPU Unit.

10-3-1 Overview

Scheduled interrupts can be used to execute interrupt tasks at fixed time intervals measured by the
CPU Unit's internal timer.
Cycle
Condition for
accepting interrupts
Internal timer
10-10
Cyclic tasks
Interrupt occurs
(ladder programs)
END
I/O refresh
MSKS instruction executed
to set the scheduled
interrupt interval
1ms
Cyclic task execution
Minimum interval: 1 ms
Specified interval
Interrupt task
Ladder program
END
Scheduled Interrupt Interval =
0.5 ms (example)
1ms 1ms
Execution Execution
Cyclic task
interrupted interrupted
execution
Executing Executing
scheduled scheduled
interrupt interrupt
task 1 task 1
CP1E CPU Unit Software User's Manual(W480)
Execution
Cyclic task
interrupted
execution
Executing
scheduled
interrupt
task 1