User's Manual

Automation and Drives - SCE
T I A Training Document Page 3 of 64 Module
Table of Contents
PAGE
1. Preface 5
2. Fundamentals of Control Engineering 7
2.2 Components of a Control Loop 8
2.3. Characteristics 11
2.4 Step Function for Examining Controlled Systems 12
2.5. Self-Regulating Processes 13
2.5.1. Proportional Controlled System without Time Delay 13
2.5.2. Proportional Controlled System with a Time Delay 14
2.5.3 Proportional Controlled System with Two Time Delays 15
2.6 Controlled Systems without Inherent Regulation 17
2.7 Types of Controllers 18
2.7.1 Two Position Controllers 18
2.7.2 Three Position Controllers 20
2.7.3 Basic Types of Continuous Controllers 21
2.8 Objectives for Controller Adjustment 27
2.9 Digital Controllers 29
3. Discontinuous Action Controller as Two Position Controller 31
3.1 Function and Problem Description 31
3.2 Possible Solution for the PLC Program: 34
4. Controller Block (S)FB41 "CONT_C" as Software PID Controller in STEP 7 37
4.1 Task Definition for PID Standard Controller 37
4.2 (S) FB 41 “CONT_C“ 39
4.3 Exercise Example 40
5. Setting Controlled Systems 54
5.1 General 54
5.2 Setting the PI-Controller according to Ziegler-Nichols 55
5.3 Setting the PID Controller according to Chien, Hrones and Reswick 55
5.4 Exercise Example 57
6. Appendix 60
B3
Issued: 02/2008 Control Engineering with STEP 7