Lenze PLC Designer PLC Designer (R2-x) Instrukcja Użytkownika Pobierz pdf (Strona 652)

L-force | PLC Designer

PLC Designer Libraries

650 DMS 3.2 EN 02/2011 TD29 

Example in FBD:

Example in ST:

RTRIGInst(CLK:= VarBOOL1);

VarBOOL2 := RTRIGInst.Q;

Provided by standard.lib.

The function block F_TRIG a falling edge.

FUNCTION_BLOCK F_TRIG

M: BOOL := FALSE;

Q := NOT CLK AND NOT M;

M := NOT CLK;

The output Q and the help variable M will remain FALSE as long as the input variable

CLK returns TRUE. As soon as CLK returns FALSE, Q will first return TRUE, then M will be

set to TRUE. This means each time the function is called up, Q will return FALSE until

CLK has a rising followed by a falling edge.

Lenze PLC Designer PLC Designer (R2-x) Instrukcja Użytkownika Strona 652