<4. Control Application Creation>
● Control Task Settings
The Task Settings dialog is used for specifying the execution interval, execution
priority, watchdog time and other settings of a control task.
For details on the relationship between the execution interval, priority and watchdog
time of a control task, and how these settings affect task execution, see Section
4.3.3, “Task Schedule” of TI “FCN-500 Technical Guide,” Section B4.3.3, “Task
Schedule” of TI “FCN-RTU Technical Guide.”
1. Execution interval of control task
Specify the execution interval of a control task in the [Interval] field on the Task
Settings dialog. The default execution interval for a new project is 100 ms. Modify it
according to the value decided as described in Section 2.2.4, ”Determining
FCN/FCJ Scan Cycle.”
2. Priority
When running multiple tasks concurrently on an FCN-500 or FCN-RTU, specify a
value (ranging from 0 to 31 in decreasing priority) for [Priority] on the task settings
dialog as the priority level of a task relative to other tasks during execution.
Assigning different priority values to individual tasks running in multi-tasking mode is
recommended.
3. Watchdog time
When the actual execution time of a control task exceeds the specified [Watchdog
Time], a watchdog error is generated and handled according to the setup described
in Section 4.1.4, “Specifying Target FCN/FCJ.”
Setting the watchdog time to 0 disables the watchdog timer.
Set the watchdog time to the same value as the control task execution interval as
described in Section 4.1.4, “Specifying Target FCN-500, FCN-RTU” is
recommended
4. Other Settings
The other settings on the Task Settings dialog including [Stack] and [Options] can be
left unchanged at default values.
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