Function Block - On timer.

Inputs

Input

Data type

Description

IN

BOOL

Timer command.

PT

TIME

Programmed time.

Outputs

Output

Data type

Description

Q

BOOL

Timer elapsed output signal.

ET

TIME

Elapsed time.

Time diagram

Fixed_Image

Remarks

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 LD language, the input rung is the IN command. The output rung is Q the output signal.

ST Language

MyTimer is a declared instance of TON function block.

MyTimer (IN, PT);
Q := MyTimer.Q;
ET := MyTimer.ET;

FBD Language

Fixed_Image

LD Language

Fixed_Image

Fixed_Image See also

TOF  TP  BLINK


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