Siemens Module B3 manual Automation and Drives SCE

Page 47

Automation and Drives - SCE

14.In the hardware configuration, at Properties of the CPU, a fixed cycle time can be set for executing OB35.

However, this cycle time should not be selected too short. It has to be ensured that all blocks called from OB35 can be processed within this time, and if OB1 is used at the same time, that there is enough time for it also. (→ Execution)

Enter execution time

15. Open ‘OB35’ from SIMATIC Manager (→ OB35)

Double click on block 'OB35'

 

 

 

 

 

 

 

 

Preface Fundamentals

Discontinuous Action Controllerr

Controller Block (S)FB41

 

Setting the System Appendix

 

 

 

 

 

 

 

 

 

T I A Training Document

Page 47 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 Prerequisites To 3 days Module C To 3 days Module DFrequency Converter at Simatic S7 Learning ObjectivePLC Hardware and software requiredTasks of Control Engineering Fundamentals of Control EngineeringFeedback Variable r Components of a Control LoopControlled Variable Controlling Element Disturbance Variable zSetpoint Value w Comparing ElementDead Time ActuatorControlled System Characteristics Step Function for Examining Controlled Systems ForAutomation and Drives SCE Time constant Proportional Controlled System with a Time DelayControllability of P-Tn systems Proportional Controlled System with Two Time DelaysTu Delay time Tg Transition time Proportional Controlled System with n Time Delays Controlled Systems without Inherent Regulation Types of Controllers Two Position Controllers Hysteresis Switch-On Value Manipulated Variable TimeThree Position Controllers Basic Types of Continuous Controllers Proportional Controllers P-Controller Automation and Drives SCE Integral Action Controllers I- Controller WithController Layout PI ControllersPID Controllers Derivative Action Controllers D-ControllerObjectives for Controller Adjustment 450.85 Digital Controllers DAC Preface Fundamentals YES StructogramExercise Assignment List Symbol Address CommentNetwork Possible Solution for the PLC ProgramD24/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 Description FB 41 ContcUse 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 T g Approximation GeneralTu-TgApproximation Setting the PI-Controller according to Ziegler-Nichols For setpoint characteristic MAN Solution of the PLC program Setpoint Setting the PI controller according to Ziegler-NicholsAppendix Diagram of the controller blockComrst Bool False Input Parameters Data Value Range Default Description TypeParameter Data Type Value Range Default Lmnhlm Real Lmnllm Output Parameters Parameter Data Value Range Default Description Type