Lenze PLC Designer PLC Designer (R2-x) Instrukcja Użytkownika Pobierz pdf (Strona 651)

L-force | PLC Designer

PLC Designer Libraries

 DMS 3.2 EN 02/2011 TD29 649

19.1.3 Trigger...

Provided by standard.lib.

The function block R_TRIG detects a rising edge.

FUNCTION_BLOCK R_TRIG

M : BOOL := FALSE;

Q := CLK AND NOT M;

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

CLK is FALSE. As soon as CLK returns TRUE, 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 falling edge followed by an rising edge.

Declaration example:

RTRIGInst : R_TRIG ;

Example in IL:

CAL RTRIGInst(CLK := VarBOOL1)

LD RTRIGInst.Q

Lenze PLC Designer PLC Designer (R2-x) Instrukcja Użytkownika Strona 651