Yaskawa MP900 Series Ladder Programming Manual - Manual (Page 47)

4.2 Ladder Drawings
4.2.2 Controlling the Execution of Drawings
4-6
( 3 ) Execution Processing of Drawings
The execution processing for drawings is executed by calling the drawings from the top to the bottom, following the
hierarchy of the drawings. The hierarchy of drawings is shown below using DWG.A drawings as an example.
ΠThe parent drawing is automatically called and executed by the system.
Child drawings and grandchild drawings are executed by calling them from a parent drawing or a child drawing using
the Call Program (SEE) instruction.
ΠYou can call functions from any drawing. You can also call functions from other functions.
ΠIf an operation error occurs, the operation error drawing for the drawing type will be started automatically.
Execution is started by the system program
when the execution condition is met.
Parent Drawing
H H01
H02
H00
H01.01
FUNC 01
Child Drawings Grandchild Drawings
Function
Execution is
automatically
started by the
system.
An operation
error occurs.
SEE
H01
SEE
H02
END END
END
END
END
END
SEE
H01.H01
FUNC
01