Download presentation

Presentation is loading. Please wait.

Published byJosephine Bavis Modified over 2 years ago

1
**3442 Industrial Instruments 2 Chapter 8 Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 Princess Sumaya Univ. Electronic Engineering Dept. 3442 Industrial Instruments 2 Chapter 8 Discrete-State Process Control Dr. Bassam Kahhaleh Dr. Bassam Kahhaleh

2
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Definitions The discrete state of the process at any moment is the set of all input and output values. An event in the system is defined by a particular state of the system, i.e. particular values of inputs and outputs. A discrete-state process control is a particular sequence of events through which the process accomplishes some objective

3
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Example Frost-free refrigerator/freezer Discrete-state I/P Door open/closed Cooler temp. high/low Freezer temp. high/low Power switch on/off Frost detector on/off Frost eliminator timer out/not out

4
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Example Frost-free refrigerator/freezer Discrete-state O/P Light on/off Compressor on/off Timer on/off Heater on/off Baffle open/closed

5
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Discrete-State Variables Continuous Control

6
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Discrete-State Variables Continuous Control Discrete Control

7
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Discrete-State Variables Continuous Control Discrete Control Composite Discrete/Continuous Control

8
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Process Specifications Process Objectives Process Hardware Input Devices Limit Switches Comparators Push Buttons Output Devices Lights Motors Solenoids

9
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Event Sequence Description Narrative Statements Flowcharts Binary-State 00 01 1X X / 0 1 / 1 0 / 0 X / 1

10
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Event Sequence Description Flowchart Example

11
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Event Sequence Description Flowchart Example

12
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Event Sequence Description Binary-State Example Fill the tank to level A from valve A. Fill the tank to level B from valve B. Start the timer, heat, and stir for 5 minutes. Open output valve C until the empty switch engages.

13
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Event Sequence Description Binary-State Example I/P Variables LA LB LE TU O/P Variables VA VB VC TM S H

14
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Event Sequence Description Binary-State Example State: LA LB LE TU VA VB VC TM S H

15
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Relay Controllers & Ladder Diagrams Control Relays (Relay Sequencer)

16
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Relay Controllers & Ladder Diagrams Ladder Diagram

17
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Relay Controllers & Ladder Diagrams Ladder Diagram Example

18
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Relay Controllers & Ladder Diagrams Ladder Diagram Example

19
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Relay Controllers & Ladder Diagrams Ladder Diagram Example

20
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Relay Controllers & Ladder Diagrams Ladder Diagram Example

21
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Relay Controllers & Ladder Diagrams Ladder Diagram Example When the START button is pushed, the platform is driven to the down position. When the STOP button is pushed, the platform is halted at whatever position it occupies at that time. When the UP button is pushed, the platform, if it is not in downward motion, is driven to the up position. When the DOWN button is pushed, the platform, if it is not in upward motion, is driven to the down position.

22
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Relay Controllers & Ladder Diagrams Ladder Diagram Example Start Stop

23
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Relay Controllers & Ladder Diagrams Ladder Diagram Example START STOP Power

24
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Relay Controllers & Ladder Diagrams Ladder Diagram Example START ↓ Motor STOP Power

25
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Relay Controllers & Ladder Diagrams Ladder Diagram Example START ↓ Motor UP ↑ Motor STOP Power Down

26
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Relay Controllers & Ladder Diagrams Ladder Diagram Example CR CR

27
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Hardwired Programming Relay Sequencers Programmable Logic Controllers (PLCs) Processor Input Modules Output Modules

28
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Programmable Logic Controllers (PLCs) Input Module

29
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Programmable Logic Controllers (PLCs) Output Module

30
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Programmable Logic Controllers (PLCs) Logic Programming Using a NC switch to turn off a light with relay logic and with PLC programming: The button turns the light OFF. With relay logic the button turns the light ON. With a PLC program the button turns the light ON

31
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control Programmable Logic Controllers (PLCs) Logic Programming NO switches are considered INACTIVE when they are read as open circuit, and ACTIVE when they are read as closed circuit. In the ladder diagram, 01 must be ACTIVE while 03 must be INACTIVE to turn 08 ON.

32
**8: Discrete-State Process Control**

Princess Sumaya University Industrial Instruments 2 8: Discrete-State Process Control End of Chapter 8

Similar presentations

OK

3442 Industrial Instruments 2 Chapter 10 Analog Controllers

3442 Industrial Instruments 2 Chapter 10 Analog Controllers

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Seminar ppt on data mining Ppt on technology and science A ppt on computer networking Business intelligence microsoft ppt online Ppt on new technology in cse Ppt on review of related literature in research Ppt on pierre simon laplace A ppt on natural disasters Ppt on shell scripting expect Ppt on steps to scan