Conditions Programmed in ST
Describe the condition attached to a transition with the Structured Text (ST) language. The complete expression must have Boolean type and may be terminated by a semi colon, according to this syntax:
< boolean_expression > ;
The expression may be a TRUE or FALSE constant expression, a single input or an internal Boolean variable, or a combination of variables that leads to a Boolean value.
Example
(* SFC Program with ST programming for Transitions *)
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