Omron CJ - PROGRAMMING MANUAL 08-2008 Programming Manual page 58

Description of Tasks
Task Execution Time
20
While a task is on standby, instructions in that task are not executed, so their
OFF instruction execution time will not be added to the cycle time.
Note From this standpoint, instructions in a task that is on standby are just like
instructions in a jumped program section (JMP-JME).
Since instructions in a non-executed task do not add to the cycle time, the
overall system performance can be improved significantly by splitting the sys-
tem into an overall control task and individual tasks that are executed only
when necessary.
Earlier system
Most instructions
are executed.
(Instructions in
subroutines and
jumps are
executed only
when
necessary.)
Section 1-6
CS/CJ-series PLCs
Task 0
Instructions are
executed only
Task 1
when necessary.
Task 2
Task 3