Clean-in-Place Cycle SFC

Clean-in-place cycle (SFC)

A clean-in-place sequential function chart documents how a vessel is washed without being dismantled. The chart starts from a stable ready state, then moves through pre-rinse, caustic wash and final rinse as each phase reports completion. Keeping each phase as a separate step makes the intended valve and pump actions clear to operators, controls engineers and reviewers. It also gives a PLC programmer a direct starting point for implementation in an IEC 61131-3 environment. Add temperature, conductivity, return-flow or timeout conditions when the cleaning procedure requires them. The completed SFC is useful in a functional specification, factory acceptance test or change review because it records both the normal sequence and the signals that permit each transition.

유형 순차 기능 차트표준 IEC 61131-3:2013 §6.5엔진 schematex-sfc업데이트됨 2026. 9. 24.

요청 내용

“Create an SFC for a clean-in-place cycle: start from a ready step, then pre-rinse, caustic wash, final rinse, and complete, advancing on RinseDone, WashDone, and FinalRinseDone signals.”

그렇다면Add an acid wash step after the caustic wash.Add a conductivity condition before the final rinse.

이 도면에 담긴 내용

그 이면의 의사결정을 읽어 보세요.

01Safe idle state

Keep the cycle in a ready step until an operator starts it.

02Separate phases

Give rinse and wash actions their own steps for clear operator review.

03Explicit completion

Use a final complete step so downstream equipment can see the cycle finished.

Use this pattern for a single-vessel CIP cycle when each phase has a dependable completion signal.

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자주 묻는 질문

What is a CIP SFC?

It is a sequential function chart that shows the ordered cleaning steps, their actions and the conditions that move the cycle forward.

What signals should advance a CIP cycle?

Use measured or verified conditions such as elapsed wash time, conductivity, temperature, flow confirmation or a tank-level signal.

Can a CIP chart include safety interlocks?

Yes. Describe the permissives and interlocks so they can be represented as transition conditions or actions.