Lenze PLC Designer PLC Designer (R2-x) Manuel d'utilisateur télécharger pdf (Page 659)

L-force | PLC Designer

PLC Designer Libraries

 DMS 3.2 EN 02/2011 TD29 657

Example in IL:

CAL TONInst(IN := VarBOOL1, PT := T#5s)

LD TONInst.Q

Example in FBD:

Example in ST:

TONInst(IN := VarBOOL1, PT:= T#5s);

Provided by standard.lib.

The function block TOF implements a turn-off delay..

TOF(IN, PT, Q, ET) means:

IN and PT are input variables type BOOL respectively TIME. Q and E are output variabls

type BOOL respectively TIME. If IN is TRUE, the outputs are TRU respectively 0.

As soon as IN becomes FALSE, in ET the time will begin to be counted in milliseconds in

ET until its value is equal to PT. It will then remain constant.

Q is FALSE when IN is FALSE und ET equal PT. Otherwise it is TRUE.

Thus, Q has a falling edge when the time indicated in PT in milliseconds has run out.

Graphic display of TOF behavior over time:

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Lenze PLC Designer PLC Designer (R2-x) Manuel d'utilisateur Page 659