R_trig in St

plambert

Hi

Can someone help me code a rising edge in ST (R_trig) I always get an error no matter what i code.

tx

Martin [PLCnext Technology Team]

// 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;