Conveyor Startup Sequence SFC

Conveyor startup sequence SFC

A sequential function chart makes a conveyor startup sequence explicit. Each step represents the active phase, while the transition conditions state what must be true to advance. This example starts in a stopped state, checks the guard and drive conditions, then holds the run action active until a stop request arrives. It is a clear way to discuss sequence behavior before implementing detailed PLC interlocks. 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.

類型 循序功能圖標準 IEC 61131-3:2013 §6.5引擎 schematex-sfc更新時間 2026/9/24

需求

“Create an SFC for conveyor startup: stopped initially, safety check after StartButton, start the drive when GuardClosed and DriveReady, run after DriveStarted, and return to stopped on StopButton.”

接著試試Add an emergency-stop transition back to stopped.Add a five-second start delay before running.

這張圖裡有什麼

看懂背後的決策。

01Initial state

The conveyor begins stopped.

02Transition guard

Guards and drive readiness must both be true.

03Stop path

A stop button returns the chart to the initial state.

Use for a basic startup narrative, with site safety logic implemented and reviewed separately.

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常見問題

What does the initial step mean?

It is the step active when the chart starts or returns to its reset state.

What is a transition condition?

It is the boolean condition required to move from one step to the next.

Can safety logic be shown?

Yes, conditions such as guard status can be used on transitions.