Basic Characteristics RAPID

Backward execution Basic Characteristics RAPID
When the procedure is called during backwards execution, the following occurs:
PROC MoveTo ()
.. MoveL p1,v500,z10,tool1;
MoveTo; MoveL p2,v500,z10,tool1;
.. MoveL p3,v500,z10,tool1;
BACKWARD
MoveL p3,v100,z10,tool1;
MoveL p2,v100,z10,tool1;
MoveL p1,v100,z10,tool1;
ENDPROC
Instructions in the backward or error handler of a routine may not be executed
backwards. Backward execution cannot be nested, i.e. two instructions in a call chain
may not simultaneously be executed backwards.
A procedure with no backward handler cannot be executed backwards. A procedure
with an empty backward handler is executed as “no operation”.
5-38 RAPID Reference Manual