```pascal
// Block Type: FC
// Block Name (Original): ITC MainRoutine
// Block Number: 3500
// Original Network Languages: LAD
// Block Comment:
//   (c) by SIDEL
//   Name       : Interchange Signals: Function Main Call
//   Description:
//    Function: Interchange Signals
//    - Modules Main Call
//   --------------------------------------------------------------------------------

FUNCTION "ITC_MainRoutine" : Void
{ S7_Optimized_Access := 'TRUE' }
VERSION : 0.1

VAR_TEMP
  ParamError : Bool;
END_VAR

BEGIN

  // Network 1: Function: Data In (Original Language: LAD)

  ITC_DataIn();

  // Network 2: Module: Machine Communication (Original Language: LAD)

  ITC_Communic_MainRoutine();

  // Network 3: Module: Signal Exchange (Original Language: LAD)

  ITC_Exchange_MainRoutine();

  // Network 4: Function: Data Out (Original Language: LAD)

  ITC_DataOut();

END_FUNCTION

```