Siemens Module B3 manual Automation and Drives SCE

Page 48

Automation and Drives - SCE

16.With ‘LAD, STL, and FBD – Program S7 Blocks’, you now have an editor that allows you to edit your STEP7 program accordingly. To this end, OB35 has already been opened with the first network.

To generate your first operations, you have to highlight the first network. Now you can write your fist STEP7 program.

In STEP 7, individual programs are usually subdivided into networks. You open a new network by clicking on the network symbol.

Note: Comments on program documentation are separated from the program commands by the character sequence“//“.

Open new network

Highlight network and write program

The networkCall SFB41,DB41

calls the PID controller block SFB41 together with an instance DB.

Generate instance DB (→ Yes)

 

 

 

 

 

 

 

 

Preface Fundamentals

Discontinuous Action Controllerr

Controller Block (S)FB41

 

Setting the System Appendix

 

 

 

 

 

 

 

 

 

T I A Training Document

Page 48 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