ChatDiagram
Try for free
4 templates · Ladder logic

Valve Control Ladder Logic

Ladder logic is the backbone of industrial valve control, translated into easy-to-follow rung diagrams. On this page you’ll find practical examples for common valve automation tasks—from a simple pushbutton start/stop to timed sequences and safety interlocking.

Standard IEC 61131-3 Ladder DiagramEngine schematex-ladderExport SVG · PNG · PDF
4 templates
Ladder logic Valve Control
Automatic Fill/Empty Valve ControlAutomatic Fill/Empty Valve ControlValve ControlUse template →Interlocked Valve Control with Emergency ShutdownInterlocked Valve Control with Emergency ShutdownValve ControlUse template →Timer-Based Valve Sequencing Ladder DiagramTimer-Based Valve Sequencing Ladder DiagramValve ControlUse template →Valve Start/Stop Ladder LogicValve Start/Stop Ladder LogicValve ControlUse template →

Nothing close enough? Start from a blank ladder logic → Describe it in one paragraph.

How to

How to use a ladder logic template.

  1. 01Open the ladder editor

    Launch the ladder diagram maker on ChatDiagram and start with a new rung.

  2. 02Assign I/O addresses

    Label inputs (limit switches, pushbuttons) and outputs (valve solenoids) so your ladder matches the real hardware.

  3. 03Build control rungs

    Drag contacts (XIC, XIO) and coils (OTE) onto the rung. Combine series and parallel branches for the desired logic.

  4. 04Add timers or counters

    Use TON, TOF, or CTU blocks to control time-based valve sequences or count cycles.

  5. 05Simulate and export

    Test your diagram with the built-in simulator, then export as PDF or image for documentation.

FAQ

Questions about ladder logic templates

What is valve control ladder logic?

Valve control ladder logic is a graphical programming language used in PLCs to automate industrial valves. It uses rungs with contacts (representing sensor states) and coils (representing valve solenoids) to define sequences such as open/close, interlocking, or timed operations.

How do I create a start/stop valve circuit in ladder logic?

Place a normally-open start pushbutton in series with a normally-closed stop button, controlling a valve output coil. Add a holding contact wired in parallel with the start button to keep the valve energized after the start button is released.

How can I interlock multiple valves with ladder logic?

Add normally-open contacts from other valves’ feedback sensors or output coils in series with the valve you want to interlock. This prevents conflicting actions, for example ensuring a drain valve cannot open while a fill valve is active.

What role do timers play in valve control?

Timers allow delayed or sequential valve actions. For instance, a TON (timer on-delay) can open a valve 5 seconds after a start input. TOF (timer off-delay) holds a valve open for a set time after an input signal stops.

Are there standard symbols for valves in ladder logic?

No, ladder logic does not reserve a special symbol for valves. A valve is represented by an output coil (OTE) addressed to the physical output that energizes the valve solenoid. Its status feedback (e.g., open/closed limit switches) appears as input contacts.