Introduction.

Workshop PG5
Program structures
5.4 Structure View and Execution Path
Once you have built your program, you can view the block structure of the program. Click on
the Block structure view icon, located in the tool bar of the project manager. This will display
the structure, and show you which COB is calling which PB, FB, or SB. The display below is
for the FB example on the preceding page. It shows that FB1 is being called by COB 0 twice.
Block structure
view icon.
Block structure
view
To display the execution path, you need to be online and the program running. Stop
the program and place the curser in the center of the page and right click the mouse.
This will display the pull down menu below. Click on Execution path, and it will
display the path. This works with the above program because it consists of only
FB’s. For a program with several segements, you would have to set break points to
ensure you stop within a FB, PB, or SB. Setting break points is explained in
chapter 7.
The display shows that the FB 1 was called from
the COB 0. (25) is the line number that we return
to when the FB is finished. (10) is the line
that we stopped on in the FB.
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