→Call

according to →IEC-standard: language construct causing the execution of a  →function, →function block, or →method

The ST-syntax for calls is listed under "Calls in ST". 
Information on calls in FBD is listed under "Calls of blocks: functions or function blocks". Example for calls within the FBD-editor are listed under "Order of networks in FBD".
Information on calls in LD is listed under "Functions and function blocks in LD".