<4. Control Application Creation>
Execution triggers (status change or error) for a system tasks can be selected
from a list of predefined triggers.
System tasks are run only under specific FCN-500 or FCN-RTU conditions.
Hence, this task type is, in general, not used in control applications except for
some special-purpose applications.
As default and system task types are, in general, not used in control applications,
the description hereafter is limited to the cyclic task type.
Moreover, the term "control task" hereafter shall refers to a cyclic control task.