Industrial Engineer · phase 3 of 16
Event Task
Task triggered by a configured hardware, motion, network, or program event.
The Explain card
- Plain English
- An event task runs once when something specific happens. The trigger can be an input module reporting a change, a motion axis reaching a position, a consumed tag arriving, or a program instruction.
- Example
- A registration mark on a web triggers an input change event. The task captures the encoder position within microseconds instead of waiting for the next scan.
- Why it matters
- When a scan of ten milliseconds is too slow, the event task is how you respond in the moment the thing happens. It also runs only as often as the event does, so it spends no CPU time waiting.
- Hook
- Do this now, then go back to sleep.
Where it sits in the deck
Phase 3: PLC Program Organization and Execution
How the logic is arranged and how the scan actually runs it, which is the difference between code that works and code that works every time.
