→Output variable

according to →IEC-standard: →variable which is used to return a value from the →program organization unit except for →classes

The ST-syntax for output variables is listed under "Declaration of output variables in ST". 
Information on the declaration of variables in →FBD is listed under "Declaring variables in FBD". Information on the declaration of variables in →LD is listed under "Declaring variables in LD and assigning a variable to contact/coil".