IN : BOOL Timer command
PT : TIME Programmed time
Q : BOOL Timer elapsed output signal
ET : TIME Elapsed time
The timer starts on a rising pulse of IN input. It stops when the elapsed time is equal to the programmed time. A falling pulse of IN input resets the timer to 0. The output signal is set to TRUE when programmed time is elapsed, and reset to FALSE when the input command falls.
In FFLD language, the input rung is the IN command. The output rung is Q the output signal.
(* Inst_TON is a declared instance of TON function block *)
Inst_TON( FALSE, T#2s );
Q := Inst_TON.Q;
ET := Inst_TON.ET;
(* MyTimer is a declared instance of TON function block *)
Op1: CAL MyTimer (IN, PT)
FFLD MyTimer.Q
ST Q
FFLD MyTimer.ET
ST ET
See also
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