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plc · process-control

CIP cleaning cycle SFC

A clean-in-place sequence is naturally expressed as an SFC because only one phase is active at a time. This example moves from idle through pre-rinse, timed caustic wash, and final rinse before issuing a completion pulse. Each transition names the signal that confirms the prior phase. It provides a compact design-review view of a cleaning cycle, while the actual recipe must still define temperatures, concentrations, flow, and validation requirements. Before using the layout in a build or document, compare every label with the source requirements and update the drawing when parts, conditions, or materials change. The example is deliberately small so the essential relationships remain readable, easy to review with collaborators, and ready to extend with the details required for the actual project.

Tipo Gráfico secuencial de funcionesNorma IEC 61131-3:2013 §6.5Motor schematex-sfcActualizado 24/9/2026
CIP cleaning cycle
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La solicitud

“Create an SFC for a CIP cleaning cycle with idle, pre-rinse, a 20-minute caustic wash, final rinse, and complete steps, advancing on the corresponding completion signals.”

Entonces pruebaAdd a sanitize step after the final rinse.Change the caustic circulation time to 30 minutes.
Qué hay en este dibujo

Lee las decisiones que hay detrás.

01Phases

Rinse, wash, and final rinse are separate active states.

02Timed action

Caustic circulation has a 20-minute delay qualifier.

03Completion

Each phase waits for its defined feedback.

Use as a high-level sequence; validated recipes and safety conditions remain site specific.

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Preguntas frecuentes

Preguntas habituales

What is CIP?

Clean-in-place is a controlled cleaning process for equipment without disassembly.

Why use a timed action?

It records that the wash action must remain active for a set time.

What returns the chart to idle?

The complete step transitions back to idle after its completion action.