R_trig in St

Comments

• Martin [PLCnext Technology Team]

  February 2022

  // R_TRIG1 is a function block instance of type R_TRIG
  // MyBoolean and RisingEdge are both local variables of type BOOL
  R_TRIG1(CLK := MyBoolean, Q => RisingEdge);
  
  // Or, alternatively, using a local variable (MyOldBoolean) instead of a Function Block:
  RisingEdge := MyBoolean AND NOT MyOldBoolean;
  MyOldBoolean := MyBoolean;