Manual/Auto, bumpless transfer and tracking
Цель: Изучить тему «Manual/Auto, bumpless transfer and tracking» 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
Operators switch controller modes. In Manual output set directly. In Auto controller calculates output. If integral state not aligned with manual output, switching to Auto can cause output jump - bump.
Bumpless transfer
Controller tracks manual output and adjusts internal bias/integral so Auto starts from current output. Similar issue occurs in cascade when secondary controller changes between Local/Remote setpoint.
Практическая работа
Valve manually at 60 %, controller internal output would be 20 %. Explain what happens without tracking when switched Auto and why bumpless transfer matters.
Самопроверка
• What is Manual mode?
• What is bumpless transfer?
• Why integral tracking?
• Where else tracking used?
• What risk of sudden output jump?
Что нужно запомнить
- If integral state not aligned with manual output, switching to Auto can cause output jump - bump.
- Controller tracks manual output and adjusts internal bias/integral so Auto starts from current output.
- Similar issue occurs in cascade when secondary controller changes between Local/Remote setpoint.
- Valve manually at 60 %, controller internal output would be 20 %.
- Explain what happens without tracking when switched Auto and why bumpless transfer matters.