ABB AC 800M, Library Object Style Manual

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Execution order Section 4 Engineering Interface
60 3BSE042835-600
Execution order
For control modules the execution order is determined by the normal code sorting.
The numeric execution order indication (after the instance name) indicates the
execution order of the forward code blocks.
In the Figure 10 the code sorting is done in two ways. The code execution of the two
invoked CMTypes marked with the red rectangle will be code sorted as normal for
control modules. This means that, for example a PID loop that are dependent on the
code sorting for control modules to operate optimally will work in the Diagrams.
For the rest of the diagram the normal data flow order will determine the execution
order of the Diagram. The data flow order in
Figure 10 Flow order and Control
module code sorting will be as follows.
1. FBtype1_2:1
2. (CMType_1:2 and CMType_2:3 sorted according sorting rules for control
modules)
3. FBType1_3:4
Figure 10. Flow Order and Control Module Code Sorting