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PLS

Function BlockA function block groups an algorithm and a set of private data. It has inputs and outputs. - PulseWhen the step gets activated, the action is activated for a single execution, and possibly once again when the step is deactivated signal generator

Inputs

RUN : BOOL    Enabling command
CYCLE : TIME  Signal period

Outputs

Q : BOOL      Output pulse signal

Time diagram

Remarks

On every period, the output is set to TRUE during one cycle only. In FFLD language, the input rung is the IN command. The output rung is the Q output signal.

ST Language

(* MyPLS is a declared instance of PLS function block *)
MyPLS (RUN, CYCLE);
Q := MyPLS.Q;

FBD Language

FFLD Language

IL Language

(* MyPLS is a declared instance of PLS function block *)
Op1: CAL MyPLS (RUN, CYCLE)
     FFLD  MyPLS.Q
     ST  Q

See also

TON   TOF   TP

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