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Control Notes

Reflections of a Process Control Practitioner. After search, use. Links at top of page to view other pages. Get Updates on Facebook. Tuning for Setpoint Tracking versus Disturbance Rejection. March 11, 2017. So what is the real issue here? Figure 1. Response of a lag-dominant control loop to a disturbance. Black trend is the simulated disturbance. Figure 2. Response of the same control loop as above to a setpoint change. The setpoint filter’s time constant should be set between 1 and 1.5 times the in...

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Reflections of a Process Control Practitioner. After search, use. Links at top of page to view other pages. Get Updates on Facebook. Tuning for Setpoint Tracking versus Disturbance Rejection. March 11, 2017. So what is the real issue here? Figure 1. Response of a lag-dominant control loop to a disturbance. Black trend is the simulated disturbance. Figure 2. Response of the same control loop as above to a setpoint change. The setpoint filter’s time constant should be set between 1 and 1.5 times the in...

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Control Notes | blog.opticontrols.com Reviews

https://blog.opticontrols.com

Reflections of a Process Control Practitioner. After search, use. Links at top of page to view other pages. Get Updates on Facebook. Tuning for Setpoint Tracking versus Disturbance Rejection. March 11, 2017. So what is the real issue here? Figure 1. Response of a lag-dominant control loop to a disturbance. Black trend is the simulated disturbance. Figure 2. Response of the same control loop as above to a setpoint change. The setpoint filter’s time constant should be set between 1 and 1.5 times the in...

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blog.opticontrols.com

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Website Contents | Control Notes

http://blog.opticontrols.com/site-map

Reflections of a Process Control Practitioner. After search, use. Links at top of page to view other pages. Get Updates on Facebook. Below are the contents of the Control Notes website, not the contents of the book. To see the contents of the book, click the book’s image on the right, and then click the “Look Inside” link. Introduction to Control Systems and Optimization. Settings in the Controller were Closer than they Appeared. Tools of the Tuner. Causes of Dead Time in a Control Loop. A Tutorial on Ca...

2

Cohen-Coon Tuning Rules | Control Notes

http://blog.opticontrols.com/archives/383

Reflections of a Process Control Practitioner. After search, use. Links at top of page to view other pages. Get Updates on Facebook. Laquo; PID Controllers Explained. Best Practices for Control Loop Optimization. March 24, 2011. Based on the number of Google searches in 2010, the Cohen-Coon tuning rules are second in popularity only to the Ziegler-Nichols tuning rules. Cohen and Coon published their tuning method in 1953, eleven years after Ziegler and Nichols published theirs. A Note on Integral Time.

3

6. Loop Performance, Problems, and Diagnostics | Control Notes

http://blog.opticontrols.com/archives/category/performance-diagnostics

Reflections of a Process Control Practitioner. After search, use. Links at top of page to view other pages. Get Updates on Facebook. 6 Loop Performance, Problems, and Diagnostics. Laquo; Older Entries. July 21, 2015. Process design flaws often lead to poor control performance. Then all eyes are on the control engineer to make the system work. Figure 1. Process diagram with relevant instrumentation and controls (not to scale). We then put it in automatic control, and for the first time it controlled the l...

4

Control Valve Response Time | Control Notes

http://blog.opticontrols.com/archives/1295

Reflections of a Process Control Practitioner. After search, use. Links at top of page to view other pages. Get Updates on Facebook. Laquo; Controller Tuning Objectives. Control Valve Response Time. May 3, 2015. For a long time I suspected that control valves take longer to respond to small changes in controller output than to large ones. I have now confirmed this by doing tests on several control valves and analyzing the results. Figure 2. Dead time increasing at small step sizes. 6 Loop Performance, Pr...

5

About Control Notes | Control Notes

http://blog.opticontrols.com/about

Reflections of a Process Control Practitioner. After search, use. Links at top of page to view other pages. Get Updates on Facebook. Hi, I am Jacques - the author of this blog and the founder of OptiControls Inc. OptiControls provides control loop optimization and process control training services, and helps companies in the process industry improve production by solving challenging control problems and optimizing the performance of their control systems. 2 Responses to “About Control Notes”. I am prepar...

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Process Control Training

http://www.opticontrols.com/training

Option 1: Inhouse Training. OptiControls offers the following process control training courses delivered at your site. The content can be tailored to meet your specific needs. The Process Control Workshop. Advanced Regulatory Process Control. Most customers combine the first two courses into one three-day course. Many customers also add one or two days of hands-on loop tuning on their own live loops. For more details, or to schedule an inhouse training session please contact us. Option 2: Online Training.

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OptiControls Loop Simulator

http://www.opticontrols.com/loopsim

Download a free trial of the fully functional simulator. Buy from OptiControls' secure online store hosted by FastSpring.com. The real-time chart with trends of process variable, controller output, and set point shows controller and process responses. Run the simulation in real-time to get that plant-like experience, or in fast-forward mode to minimize simulation time. Pause the simulation to take measurements from static trends. Scale the Y-axis to narrow in on trends and see subtle response details.

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Control Loop Optimization Services

http://www.opticontrols.com/services

Control Loop Optimization Services. OptiControls specializes in optimizing control loop performance and solving process control problems. Our services range from general control performance audits to designing new and improved control strategies. Controller tuning and loop optimization to improve performance. Control performance audits to identify poorly performing control loops. Troubleshooting and solving of control problems. Assistance with process commissioning and startups.

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Schedule of Presentations and Training Events

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Schedule of Presentations and Training Events. Aug 2013 to Jan 2014. Online training course instructed by Jacques Smuts of OptiControls for the University of Kansas Continued Education on Thursday evenings. Course title:. Process Control and Advanced Control Strategies. Http:/ www.continuinged.ku.edu/programs/regulatory control/index.php. 2 to 7 Jun 2013. 56th ISA POWID Symposium. In Nashville, TN. Jacques will present a paper titled. Guidelines for Using Cascade Control in Power Plant. 4 to 25 Apr 2013.

opticontrols.com

Articles, Papers, and Presentations

http://www.opticontrols.com/paperspresentations

Articles, Papers, and Presentations. Authored and Presented by Jacques F. Smuts. Make sure to visit the Control Notes blog at http:/ blog.opticontrols.com. For regular articles, tips, and tricks on process control and loop optimization. Troubleshooting and Solving Poor Control Loop Performance. Special Report in Power Magazine, June 2013, pp 42-47. Valve Diagnostics on a Level Loop - Article in What's Watt, ISA POWID Newsletter, Spring 2013, pp 16 - 17. Monitoring Control Loop Performance. A 315-page boo...

opticontrols.com

Process Control for Practitioners

http://www.opticontrols.com/pcfp-book

Process Control for Practitioners. If you want a process control book to help you work in a real plant, buy this one. Excellent book for practitioners. Anyone that is looking for a good book to further develop their skills as a Process control Practitioner should pick up a copy. Great practical 'toolbox' book; Highly recommended. Outstanding coverage of the right material, in a very practical and easy to understand way. Read the full reviews at amazon.com. And published by OptiControls. This book conveys...

opticontrols.com

Process Control Consultant

http://www.opticontrols.com/jacques-smuts

Jacques F. Smuts. PhD, P.E. Founder and Principal Consultant, OptiControls Inc. Jacques is also the author of the book Process Control for Practitioners. CANADIAN MIST DISTILLERS LIMITED. Instrumentation and Control Systems Engineer at a global oil production company. Jacques Smuts provided the Huntsman engineers with training in using ControlWizard and TuneWizard software for monitoring and tuning control loops in the Freeport plant. Jacques’ in-depth knowledge in field of process control was evident in...

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Control Notes

Reflections of a Process Control Practitioner. After search, use. Links at top of page to view other pages. Get Updates on Facebook. Tuning for Setpoint Tracking versus Disturbance Rejection. March 11, 2017. So what is the real issue here? Figure 1. Response of a lag-dominant control loop to a disturbance. Black trend is the simulated disturbance. Figure 2. Response of the same control loop as above to a setpoint change. The setpoint filter’s time constant should be set between 1 and 1.5 times the in...

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