Learning Outcomes
- Explain the process or equipment involved.
- Recognise key operating conditions and hazards.
- Use trends, checks and records to support decisions.
- Identify when escalation is required.
Module 10 · Lesson 2
PLC Inputs and Outputs
Recognise digital and analogue field signals.
Why It Matters
Recognise digital and analogue field signals.
Reliable water treatment depends on multiple barriers, disciplined monitoring and prompt response to change.
Practical Method
- Observe. Check plant condition, alarms, flows, levels and water quality.
- Compare. Review operating targets, trends and recent changes.
- Verify. Confirm instruments with independent checks where required.
- Act safely. Follow approved procedures and make only authorised adjustments.
- Record and escalate. Document findings, actions and unresolved risk.
Ian's practical tip: When a result looks wrong, check the process and the instrument before changing the plant.
Practice Task
Create a one-page operating note for this topic showing the normal condition, warning signs, checks, safe actions and escalation point.