Programming options
5.2 Structuring your user program is easy
Easy Book
52
Manual, 05/2009, A5E02486774-01
A
Calling block
B
Called (or interrupting) block
① Program execution
② Instruction or event that initiates the
execution of another block
③ Program execution
④ Block end (returns to calling block)
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You can nest the block calls for a
more modular structure.
① Start of cycle
② Nesting depth
In this example, the nesting
depth is 4: the program
cycle OB plus 3 layers of
calls to code blocks.
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By creating generic code blocks that can be reused within the user program, you can simplify
the design and implementation of the user program.
●
You can create reusable blocks of code for standard tasks, such as for controlling a pump
or a motor. You can also store these generic code blocks in a library that can be used by
different applications or solutions.
●
When you structure the user program into modular components that relate to functional
tasks, the design of your program can be easier to understand and to manage. The
modular components not only help to standardize the program design but can also help
to make updating or modifying the program code quicker and easier.
●
Creating modular components simplifies the debugging of your program. By structuring
the complete program as a set of modular program segments, you can test the
functionality of each code block as it is developed.
●
Utilizing a modular design that relates to specific functional tasks can reduce the time
required for the commissioning of the completed application.
