FBD: Function Block Diagram
Цель: Изучить тему «FBD: Function Block Diagram» и закрепить её практическими заданиями и самопроверкой.
2 акад. часа чтение и разбор теории, решение задач, работа со схемой или виртуальным стендом и проверка понимания.
Основной материал
FBD represents logic and analog processing as blocks connected by signals. It is convenient for AND/OR, comparators, timers, arithmetic, PID and signal processing.
Data flow
The diagram emphasizes how values flow between blocks. For analog loop can show SCALE -> FILTER -> PID -> LIMIT -> AO.
Complexity management
Huge FBD sheet becomes unreadable. Use networks, functions and clear signal directions. Avoid crossing lines and unnamed constants.
Практическая работа
Design FBD for pressure loop: AI raw -> scale 0-10 bar -> low-pass filter -> high alarm comparator -> PID -> 0-100 limit -> AO scaling.
Самопроверка
• What is FBD strength?
• Why good for analog processing?
• What does LIMIT block do?
• Why sheet organization matters?
• How FBD relates data flow?
Что нужно запомнить
- FBD represents logic and analog processing as blocks connected by signals.
- It is convenient for AND/OR, comparators, timers, arithmetic, PID and signal processing.
- For analog loop can show SCALE -> FILTER -> PID -> LIMIT -> AO.
- Design FBD for pressure loop: AI raw -> scale 0-10 bar -> low-pass filter -> high alarm comparator -> PID -> 0-100 limit -> AO scaling.