Siemens PCS 7 manual PID Tuner

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Stabilization of Unstable Control Loops

3.2PID Tuner

The PCS 7 PID tuner can be used for integral processes without problems if at least one stable controller parameterization is already available. The following hints are helpful for this:

Fix the check mark „With integral action in the process“

Excite the process with a step in the set point in closed loop in automatic mode

Chose the proportional only controller as controller type, at least, if you want to use this controller as slave controller in cascades (e.g. subordinated to a MPC) or if you are not interested in exact set point tracking.

Set the MC_Offset to the value of the manipulated variable needed to reach the typical operating point, if you know it, in order to avoid the persistent control error at least in this operating point.

Copyright  Siemens AG 2010 All rights reserved

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MPC Level

V 1.0, Beitrags-ID: 42200753

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Contents Applikationen & Tools Page Online-support.automation@siemens.com Warranty and Liability Table of Contents Preface Objective of the ApplicationStable and Unstable Control Loops IntroductionBasic Principles of Model Predictive Control Whithout compensation With Ohne Integral Ausgleich Examples of Unstable Control Loops Level ControlPressure Control in Tanks Position Control Stabilization of Unstable Control Loops Unit-step response of an integrating processt 1s PID Tuner Connection in CFC Configuration of MPC with Slave ControllerStarting Point MV1 MV2 Connection of MPC and slave controller Commissioning Simulation Example OS picture of the example project Conclusion Bibliography Internet Link SpecificationsRelated Literature History Version Date Modifications
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PCS 7 specifications

Siemens PCS 7 is a powerful and comprehensive process control system designed for various industrial automation applications. It is part of the Siemens Totally Integrated Automation (TIA) portfolio, providing seamless integration with various Siemens products and services. The system is known for its flexibility, scalability, and reliability, making it suitable for industries such as energy, water treatment, chemicals, pharmaceuticals, and manufacturing.

One of the main features of Siemens PCS 7 is its modular architecture, which allows users to customize and scale their control solutions according to their specific needs. The system supports a diverse range of hardware and software components, from powerful servers and workstations to field devices and controllers. This modularity ensures that the system can adapt to different operational requirements while remaining cost-effective.

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