Siemens Module B3 manual With, Integral Action Controllers I- Controller

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Automation and Drives - SCE

2.7.3.2 Integral Action Controllers (I- Controller)

Integrating controllers are used to completely correct system deviations at every operating point. As long as the system deviation is not equal to zero, the amount of the controller output changes. Only when the reference variable and the controlled variable are equal -at the latest however, when the controller output reaches its system-dependent limit (Umax, Pmax etc.)- is the controller in a steady state.

The mathematical formula for this integral action is:

The controller output is proportional to the time integral of the system deviation:

with

How fast the controller output rises (or falls), depends on the system deviation and the integration time.

Block Diagram

	Preface	Fundamentals	Discontinuous Action Controller Controller Block (S)FB41	Setting the System Appendix

	T I A Training Document		Page 24 of 64	Module
				B3
Issued: 02/2008				Control Engineering with STEP 7

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Contents Module B3 Automation and Drives SCE Table of Contents Automation and Drives SCE To 3 days Module C To 3 days Module D Frequency Converter at Simatic S7Learning Objective PrerequisitesHardware and software required PLCFundamentals of Control Engineering Tasks of Control EngineeringComponents of a Control Loop Controlled VariableFeedback Variable r Disturbance Variable z Setpoint Value wComparing Element Controlling ElementActuator Controlled SystemDead Time Characteristics For Step Function for Examining Controlled SystemsAutomation and Drives SCE Proportional Controlled System with a Time Delay Time constantProportional Controlled System with Two Time Delays Tu Delay time Tg Transition timeControllability of P-Tn systems Proportional Controlled System with n Time Delays Controlled Systems without Inherent Regulation Types of Controllers Two Position Controllers Switch-On Value Manipulated Variable Time HysteresisThree Position Controllers Basic Types of Continuous Controllers Proportional Controllers P-Controller Automation and Drives SCE With Integral Action Controllers I- ControllerPI Controllers Controller LayoutDerivative Action Controllers D-Controller PID ControllersObjectives for Controller Adjustment 450.85 Digital Controllers DAC Preface Fundamentals Structogram YESAssignment List Symbol Address Comment ExercisePossible Solution for the PLC Program NetworkD24/AIFillSetpNorm/Norm.value for level setpoint Network 10 Title Task Definition for PID Standard Controller Function Diagram of the control system with a PID controller FB 41 Contc UseDescription Exercise Example Automation and Drives SCE Automation and Drives SCE Automation and Drives SCE Automation and Drives SCE Automation and Drives SCE Automation and Drives SCE Automation and Drives SCE Automation and Drives SCE SP INT PLC’ Automation and Drives SCE Automation and Drives SCE Automation and Drives SCE General Tu-TgApproximationT g Approximation Setting the PI-Controller according to Ziegler-Nichols For setpoint characteristic MAN Solution of the PLC program Setting the PI controller according to Ziegler-Nichols SetpointDiagram of the controller block AppendixInput Parameters Data Value Range Default Description Type Comrst Bool FalseParameter Data Type Value Range Default Lmnhlm Real Lmnllm Parameter Data Value Range Default Description Type Output Parameters