Best Practices for Monitoring your PID loops （监控你的PID回路的最佳实践）.pdf

Best Practices for Monitoring your PID Loops – The Key to Optimizing Control Assets Rohit S. Patwardhan and Michel Ruel1 Abstract- PID loops – also known as base layers or regulatory 4. Lack of resources controls – form the foundation of any plant’s control layer. 5. Lack of a proactive control loop optimization Keeping these thousands of control loops in good health has a program direct impact on the plant’s bottom line: it reduces variability, 6. Inability to link PID benefits to process improves quality and throughput, and decreases energy costs and performance raw material usage. This has been well proven and documented in many articles. In the last ten years, technology has evolved: 7. Lack of process knowledge control engineers can now keep track of control loop 8. Lack of monitoring technology performance and link it to the root causes of variability. 9. Lack of necessary skills to implement high However, they lack industry-wide best practices and criteria for performance PID loops determining what can be considered as excellent, good, fair, or 10. Changes in process dynamics – or equipment poor performance. To ensure that PID control loops continue to