Top 6 Questions to Answer to Reduce Process Variability
There are times when a process variable (PV) shows an unacceptable level of variability around its setpoint (SP) while being regulated by a PID controller. In order to improve the quality of regulation of the process variable, there are six important questions to consider.
In this eBook we provide the six questions along with subsequent observations to help you in answering the questions.
Need more help with process control optimization?
We offer in-person and remote Engineering Services for additional guidance. Learn more >
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ControlSoft is honored to be recognized by the Greater Cleveland Partnership as the Enterprise Tech Team of the Year at the prestigious Best of Tech Awards. This accolade highlights ControlSoft’s commitment to innovation, collaboration, and excellence in technology leadership.
Presented annually, the Best of Tech Awards celebrate the companies, organizations, and individuals whose groundbreaking contributions are driving innovation and accelerating the growth of the technology sector throughout the Greater Cleveland region.
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A key challenge in setting up a control system is determining what type of controller to use. The PID controller is generally accepted as the standard for process control, but the PI controller is sometimes a suitable alternative. A PI controller is the equivalent of a PID controller with its D (derivative) term set to zero.
It is important to understand how controllers interact with each different type of process. For details, see Table 1.
Table 1 – How PI and PID Controllers Interact with Different Kinds of Processes
Controller
Pl Controller
PID Controller
Effective for These Processes
Fast processes, such as flow, pressure, and some temperature loops.
Slower processes, such as level and insulated temperature.
Tuning Parameters
P = Proportional
I= IntegralPl controller is the equivalent of a PID controller with its D (derivative) term set to zero.
P = Proportional
I= Integral
D = DerivativeThe derivative term is particularly important for integrating processes, such as level, position, & well-insulated temperature.In general, using a derivative term can significantly increase the speed of the response of a non-integrating process and suppresses overshoot.
Response Speed
Response is slower, thus enabling a smooth and accurate PV change.
Response is faster, thus enabling setpoint to be reached more quickly.
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I/O Array Blocks – Six new I/O Array blocks have been added to the standard I/O block list. The blocks include Input Array (Boolean), Input Array (Integer), Input Array (Float), Output Array (Boolean), Output Array (Integer), and Output Array (Float).
Block Watch Window Automatic Tunable Upload – The tunable values edited from the Block Watch windows can now be uploaded automatically to the project database after updating the value in the Kernel.
OPC Device Status Detailed Dashboard – A detailed OPC Device information and connectivity status dashboard is now available in the Service Monitor Kernel icon.
For the full list of updates, please see the MANTRA Software 6.0.0.2 Release Notes, publication MN339C-EN, included with the software download.
Need help with advanced techniques for process control beyond basic PID control? Consider our Advanced Process Control Techniques training to learn about cascade control, override control, gain scheduling, feedforward compensation, and model-based control.
About ControlSoft
Since 1985, ControlSoft has been a global provider of platform-independent process control software and engineered solutions. Our products and services are sought by prominent companies in leading industries. By keeping a focus on improving plant availability, production efficiency, operational safety, and environmental compliance, we continue to deliver world-class control solutions for our customers.
MANTRA is a registered trademark of ControlSoft Inc.
https://www.controlsoftinc.com/wp-content/uploads/MANTRA-v6002.png367620Christine Dombroskyhttps://www.controlsoftinc.com/wp-content/uploads/ControlSoft-300x83.pngChristine Dombrosky2024-07-25 15:41:142024-11-14 09:56:04MANTRA Advanced Process Control Software v6.0.0.2
Tuning Cascade Loops
/in Technical NotesPID Tuning Objectives and Considerations
/in ArticlesTop 6 Questions to Answer to Reduce Process Variability eBook
/in Technical NotesTop 6 Questions to Answer to Reduce Process Variability
There are times when a process variable (PV) shows an unacceptable level of variability around its setpoint (SP) while being regulated by a PID controller. In order to improve the quality of regulation of the process variable, there are six important questions to consider.
In this eBook we provide the six questions along with subsequent observations to help you in answering the questions.
We offer in-person and remote Engineering Services for additional guidance. Learn more >
ControlSoft Wins GCP Enterprise Tech Team of the Year
/in Press ReleasesControlSoft is honored to be recognized by the Greater Cleveland Partnership as the Enterprise Tech Team of the Year at the prestigious Best of Tech Awards. This accolade highlights ControlSoft’s commitment to innovation, collaboration, and excellence in technology leadership.
Presented annually, the Best of Tech Awards celebrate the companies, organizations, and individuals whose groundbreaking contributions are driving innovation and accelerating the growth of the technology sector throughout the Greater Cleveland region.
2024 Best of Tech Day: Award winners & highlights
Tuning Rules for PI and PID
/in Technical NotesTuning Rules for PI and PID
Determining Which Controller to Use
A key challenge in setting up a control system is determining what type of controller to use. The PID controller is generally accepted as the standard for process control, but the PI controller is sometimes a suitable alternative. A PI controller is the equivalent of a PID controller with its D (derivative) term set to zero.
It is important to understand how controllers interact with each different type of process. For details, see Table 1.
Table 1 – How PI and PID Controllers Interact with Different Kinds of Processes
I= IntegralPl controller is the equivalent of a PID controller with its D (derivative) term set to zero.
I= Integral
D = DerivativeThe derivative term is particularly important for integrating processes, such as level, position, & well-insulated temperature.In general, using a derivative term can significantly increase the speed of the response of a non-integrating process and suppresses overshoot.
MANTRA Advanced Process Control Software v6.0.0.2
/in Press ReleasesControlSoft is pleased to announce the release of MANTRA Advanced Process Control Software v6.0.0.2. MANTRA v6.0.0.2 includes the following updates:
For the full list of updates, please see the MANTRA Software 6.0.0.2 Release Notes, publication MN339C-EN, included with the software download.
Need help with advanced techniques for process control beyond basic PID control? Consider our Advanced Process Control Techniques training to learn about cascade control, override control, gain scheduling, feedforward compensation, and model-based control.
About ControlSoft
Since 1985, ControlSoft has been a global provider of platform-independent process control software and engineered solutions. Our products and services are sought by prominent companies in leading industries. By keeping a focus on improving plant availability, production efficiency, operational safety, and environmental compliance, we continue to deliver world-class control solutions for our customers.
Media Contact
Paul Botzman
pbotzman@controlsoftinc.com
phone 440-443-3900, ext. 101
Contact us to learn more about MANTRA.
MANTRA is a registered trademark of ControlSoft Inc.