Chapter 5. Program Configuration and Operation Method
5-16
(a) Items to be set in Task
Set the execution condition and priority to the task being executed. Check the task no. to manage the task.
(b) I/O task processing
If interrupt signal from external signal (I/O) is occurred on main unit (%IX0.0.0~%IX0.0.7), task program is
executed by external (I/O) signal.
(c) Precaution in using I/O task program
1) If task program which is executed by interrupt signal is on execution or standby status, new task program
which is requested by identical I/O is ignored.
2) Only operation mode is Run mode, execution request of task program is recognized. Namely, execution
request of task program is ignored when operation mode is Stop mode.
(7) Internal device task program processing
Here describes the processing method of international device task program which extended the task (start
condition) of task program from contact point to device as execution range.
(a) Items to be set in Task
Set the execution condition and priority to the task being executed. Check the task no. for task management.
(b) Internal device task processing
After completing the scan program execution in CPU module, if the condition that becomes the start condition of
internal device task program is met, according to the priority, it shall be executed.
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