C Definition
void dms_AbortUserTask(long TaskNumber)
Pascal Definition
procedure dms_AbortUserTask(TaskNumber:longint);
Description
This command causes a procedure in the controller to abort execution.
Resident application procedures to be managed should be named UserTask1, UserTask2, etc. The
task number is referenced by this command.
A task can only be aborted with Abort Task if it had been started with
Begin Task.
A Task Identity is the procedure
name
that was used with the Begin
Task command that started it.
After aborting a task it is often necessary to "clean up" the residual condition of resources the task had been managing. For example if a homing procedure was using the Jog command to home and was counting on the detection
of a sensor to stop it, aborting the homing routine would leave the motor still jogging but with no reason to stop. If a task managing a blinking light is aborted the light might remain in an active condition. It is usually better to avoid using the Abort Task
command and to instead have the task terminate itself, and clean up after itself, based on a
boolean variable.
Escapes
The Abort Task block does not generate any escapes.
Note that the EscapeResult parameter must be preset to
0 before making the call or the routine will not run
Related Topics
Yield
Abort Task
Task Present