1
2
3
4
5
6
Task status and transition 6-5
3.4
Suspending tasks (SUSPEND)
The SUSPEND command temporarily stops tasks other than task 1 and places them in SUSPEND
status.
When the SUSPEND command is executed, the status transition takes place as follows.
■
Task that executed the SUSPEND command
→
RUN status
■
Specified task
→
SUSPEND status
Suspending tasks (SUSPEND)
Task 1
Task 2
Task 1
Task 2
RUN
READY
RUN
SUSPEND
SUSPEND
Task 3
READY
Task 3
READY
The task is placed in a SUSPEND status,
and is removed from the ready queue.
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3.5
Restarting tasks (RESTART)
Tasks in the SUSPEND status can be restarted with the RESTART command.
When the RESTART command is executed, the status transition takes place as follows.
■
Task for which the RESTART command was executed
→
RUN status
■
Specified task
→
READY status
Restarting tasks (RESTART)
Task 1
Task 2
Task 1
Task 3
RUN
SUSPEND
RUN
READY
RESTART
Task 2
READY
Task 3
READY
The task is placed in a READY status,
and is assigned to a ready queue.
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Summary of Contents for SCARA YRCX Series
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