Variable and Parameter Section 4 Engineering Interface
62 3BSE042835-600
code block, but the backward signal flow must be implemented in a separate code
block.
In Figure 12, the control diagram code represents the forward data flow and the ST
code represents the backward data flow. The execution order of the code blocks will
sorted according to the code sorting and algebraic loops for control modules.
Variable and Parameter
There are two ways of connecting parameters and variable in diagrams. Either by
defining the parameter or variable name directly in the connection node of the
Figure 12. Diagram Type with Control Diagram (Forward) and Structured Text
(Backward and Set_Output) code blocks
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