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SYNTAX:
 
xpxGetSourceInstance(targetInstance, VAR sourceInstance : GENERIC)                     status                             : INTEGER;
 
The xpxGetSourceInstance function finds the connected source instance from a specified target instance. A connection between the target instance and the source instance must be defined by the xpxMapInstance function before this function can be executed successfully. The target instance is specified in the targetInstance argument and the connected source instance is returned in the sourceInstance argument. If no connected source instance is found for the specified targetInstance, then the sourceInstance argument is set to zero.

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