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Phase Template: close-valve

Close a modulating control valve (write 0 to its command). It is the counterpart to open-valve, a single-action building block for composing custom recipes one device move at a time.

Where to find it

System endpoint → Equipment Library → Phases → select close-valve.

graph TD
    Start([initial]) --> EX["execute<br/>target_valve.CMD := 0"]
    EX --> Done([done])

See Phases for the diagram conventions.

What you see when it runs

Element Meaning
Active step execute — the phase completes as soon as the write is issued
Bound modules The concrete control-module instance the target_valve role resolved to

HMI screenshot pending

An annotated capture of a running close-valve phase will be added here.

Parameters

The template declares no parameters. Closing is always a write of 0 to the valve command.

Required control modules

Role Module type Description
target_valve analog-control Valve to close

Capability: reaction.

How it works

The phase has a single execute step. It writes 0.0 to target_valve.CMD and the phase completes. The stopping, aborting, and resetting charts repeat the close (idempotent). The holding and restarting charts are deliberate no-ops, because the valve is already in its safe state.

This is a single-action phase. It verifies nothing. Pair with a deviation alarm on the valve if a failed close matters. For an isolation that gates product safety, build a feedback-gated phase instead.

Used in recipes

No shipped reference recipe uses this template. It is a building block for composing your own.

Try it

  1. System endpoint → Recipes → create a draft recipe pairing an open-valve step with a close-valve step on the same unit (e.g. target_valve bound to r1-solvent-valve on reactor-1)
  2. Approve and start it from HMI endpoint → Batch Execution
  3. Watch the bound valve's faceplate: CMD moves to the open position, then back to 0

Modify this template

Want to clone this and adapt it for your own equipment? Walk through Adaptation Guide for the full clone → rebind → deploy → run workflow, and Parameter Binding to understand how recipe values flow through to control-module tags.