LADDER LOGICResources / Ladder logic symbols / Timers and countersUpdated 29 Oct 2026

TP pulse timer symbol

Also called TP, Pulse timer

A pulse timer: on a rising edge of IN, Q goes true for exactly the preset PT, however long IN stays on.

TP pulse timer symbol, IEC 61131-3 ladder diagramIEC 61131-3

What the TP pulse timer symbol means

A pulse timer: on a rising edge of IN, Q goes true for exactly the preset PT, however long IN stays on.

How it is drawn

IEC 61131-3 ladder diagram

TP function block. A box marked TP with inputs IN and PT and outputs Q and ET.

LD SVG

Where you see it

Fixed length pulses: a horn blast, a lubrication shot, a reset pulse.

Frequently asked questions

What does the TP pulse timer symbol look like?

A box marked TP with inputs IN and PT and outputs Q and ET.

Where is a TP pulse timer used?

Fixed length pulses: a horn blast, a lubrication shot, a reset pulse.

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