Control Schemes - Agenda Activity Estimated Time 1. Agenda 5 2. Learning Objectives 3. Control Schemes 50 BREAK 10 4. Control Modes 5. Control Schemes for Various Processes 40 6. Summary and Wrap-Up 7. Additional Activities 8. Lab Activity Slide 1 Instrumentation 2 – Session 6

Session 6 - Objectives Identify and describe types of control schemes On/off Lead/lag Feedback Feedforward Describe a control scheme that allows the following modes Local manual control Remote manual control Local automatic control Remote automatic control Cascading control Match appropriate control schemes to a process Given a process scenario, design an appropriate process control scheme Slide 2 Instrumentation 2 – Session 6

Boiler System Lead-Lag Control Slide 3 Instrumentation 2 – Session 6

“Free Cooling” Installation 2 75kw Chillers and 1 RH Unit. Slide 4 Instrumentation 2 – Session 6

Local Controller Slide 5 Instrumentation 2 – Session 6

Remote Controller Slide 6 Instrumentation 2 – Session 6

Local and Remote Settings Slide 7 Instrumentation 2 – Session 6

Cascading Controller Slide 8 Instrumentation 2 – Session 6

Match Appropriate control schemes to a process 1. A reactor’s catalyst feed is manipulated due to a predicted load change. A. On-Off Control B. Feedback Control C. Feedforward Control D. Lead-Lag Control Slide 9 Instrumentation 2 – Session 6

Match Appropriate control schemes to a process 1. A reactor’s catalyst feed is manipulated due to a predicted load change. A. On-Off Control B. Feedback Control C. Feedforward Control D. Lead-Lag Control Slide 10 Instrumentation 2 – Session 6

Match Appropriate control schemes to a process 2.The liquid in this tank is emptied once it reaches a specific level. A. On-Off Control B. Feedback Control C. Feedforward Control D. Lead-Lag Control Slide 11 Instrumentation 2 – Session 6

Match Appropriate control schemes to a process 2.The liquid in this tank is emptied once it reaches a specific level. A. On-Off Control B. Feedback Control C. Feedforward Control D. Lead-Lag Control Slide 12 Instrumentation 2 – Session 6

Match Appropriate control schemes to a process 3. A parallel piece of equipment begins to operate due to an increase in process load. A. On-Off Control B. Feedback Control C. Feedforward Control D. Lead-Lag Control Slide 13 Instrumentation 2 – Session 6

Match Appropriate control schemes to a process 3. A parallel piece of equipment begins to operate due to an increase in process load. A. On-Off Control B. Feedback Control C. Feedforward Control D. Lead-Lag Control Slide 14 Instrumentation 2 – Session 6

Match Appropriate control schemes to a process 4. A tank level is manipulated because an error signal has developed. A. On-Off Control B. Feedback Control C. Feedforward Control D. Lead-Lag Control Slide 15 Instrumentation 2 – Session 6

Match Appropriate control schemes to a process 4. A tank level is manipulated because an error signal has developed. A. On-Off Control B. Feedback Control C. Feedforward Control D. Lead-Lag Control Slide 16 Instrumentation 2 – Session 6

Identify the Control Scheme Feedback Control Loop Feedforward Control Loop Slide 17 Instrumentation 2 – Session 6

Identify the Control Scheme Feedback Control Loop Feedforward Control Loop X Slide 18 Instrumentation 2 – Session 6

Identify the Control Scheme Feedback Control Loop Feedforward Control Loop Slide 19 Instrumentation 2 – Session 6

Identify the Control Scheme Feedback Control Loop Feedforward Control Loop X Slide 20 Instrumentation 2 – Session 6