An alias is a user-defined data type with which an alternative name for a basic type, data type, or function block is generated.

You make the type declaration of an alias in a “DUT” object which you create in the “Project  Add Object  DUT” menu or in the context menu of an application.

TYPE <DUT name> : <basic type> | <data type> | <function block name> ; 
END_TYPE

FUNCTION_BLOCK FB_Machine
VAR_INPUT
END_VAR
VAR_OUTPUT
END_VAR
VAR
	iCounter : INT;
END_VAR
iCounter := iCounter + 1; 

// Alias for FB_Machine
TYPE A_ROBOT : FB_Machine; 
END_TYPE

PROGRAM prog_Robot
VAR
	fbRobot : A_ROBOT;
END_VAR
fbRobot();