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mapp Services V5.16

Each element of a structure (regardless of whether it is an element of a basic type or array/structure) can be mapped and used by an alias. The type of the entire structure does not have to be declared; only the mapped element type must be known.

Syntax

Mapping global variables

VAR {<Storage> AT  ( PLC | '<Task name>')}
  <Alias> {ACCESS '<Name of process variable>'}: <Type>;
  <Alias> {ACCESS '<Name of process variable>'}: REFERENCE TO <Type>;
  <Alias> {ACCESS '<Name of process variable>'}: ARRAY [<From>..<To>] OF <Type>;
END_VAR

Examples

Mapping elements of a global structure

VAR {AT PLC}
  TraceRunning {ACCESS 'VariableTrace.Running'} : BOOL;
  PosX {ACCESS 'UserStruct.Position[0]'} : LREAL;
END_VAR

Assigning elements of a local structure

VAR {AT 'PositionTask'}
  TargetX {ACCESS 'UserStruct.Position[0]'} : LREAL;
END_VAR