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Finite State Machines Using Structured Text (ST) in CODESYS V3.5

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Content: Конечные автоматы на Structured Text (ST) в CODESYS V3.5 для сложных технологических циклов.pdf (977.24 KB)
Uploaded: 08.10.2026

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Seller: vida78

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Description

Finite State Machines in Structured Text (ST) in CODESYS V3.5 for Complex Technological Cycles
A practical guide to designing reliable and deterministic control algorithms in ST. Based on IEC 61131-3, ISA-88, and PackML. Covers Moore and Mealy models, hierarchical state machines (HFSM), parallel branching (Fork/Join), Hold/Resume mechanisms, Manual/Step/Auto modes, diagnostics, and tracing.
Who it´s for: PLC programmers, automation engineers, commissioning specialists, students, and teachers.
Inside:
Theory: PLC task cycle, dangers of boolean flags, formal models, transition matrices.
ST practice: ENUM + CASE, three-phase state lifecycle (OnEntry/OnDo/OnExit), watchdog timers, FAULT branch.
Industrial standards: PackML, ISA-88.
Comparison of procedural approach and OOP State pattern.
Practical section:
5 lab projects: positioner, pump station, chemical reactor, sorting conveyor, packaging cell.
3 engineering tasks: cleanroom airlock, weigh-batch mixer, freight lift.
4 typical anti-patterns with analysis and fixes.
Appendices: universal FSM template, SFC→ST mapping table, CODESYS optimization, answers to review questions.
Important: code examples require adaptation and testing. Safety functions must be implemented with certified hardware.