Sequential Function Chart

The Five Core Programming Languages Commonly Used in PLCs

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The Five Core Programming Languages Commonly Used in PLCs

01Ladder Diagram (LD) · Features: A graphical language similar to electrical relay circuit diagrams, suitable for logical control. · Application Scenarios: Switch logic familiar to traditional electrical engineers (e.g., motor start/stop, interlocking control). 02Instruction List (IL) · Features: A low-level text language similar to assembly, consisting of operation codes and operands. · Application Scenarios: Small … Read more

Sequential Function Chart Risk Assessment: A Safety Analysis Framework for Industrial Control Systems

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Sequential Function Chart Risk Assessment: A Safety Analysis Framework for Industrial Control Systems

Click the little blue text to follow! Last week, during a safety assessment at an automation factory, I witnessed their equipment experiencing an inexplicable shutdown. The manager looked worried and said, “This is the third time this month, and each shutdown costs us over a hundred thousand.” Where is the problem? After inspection, I found … Read more

The Top 5 Electrical Languages Supporting PLC Programming: Mastering All Makes You a Pro!

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The Top 5 Electrical Languages Supporting PLC Programming: Mastering All Makes You a Pro!

Search on WeChatTechnical Training The programming languages for PLCs have distinct characteristics compared to general computer languages; they are neither high-level languages nor typical assembly languages, and they must meet the requirements of being easy to write and debug. Early PLCs only supported Ladder Diagram (LD) and Instruction List (IL) programming languages. Currently, the International … Read more

Want to Learn PLC Programming? Understand These 5 PLC Languages!

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Want to Learn PLC Programming? Understand These 5 PLC Languages!

There are currently 5 standard programming languages for PLCs, including graphical and textual programming languages. Graphical programming languages include: Ladder Diagram (LD); Function Block Diagram (FBD); Sequential Function Chart (SFC). Textual programming languages include: Instruction List (IL) & Structured Text (ST). IEC 1131-3 programming languages are a set of international programming language standards for industrial … Read more