Industrial automation Using Microcontroller By: Engr. Tarique Rafique Memon Department of Electronic Engineering QUE

1. Industrial automation Using MicrocontrollerBy: Engr. Tarique Rafique MemonDepartment of Electronic EngineeringQUEST Nawabshah

2. Contents Introduction Parameters consideration for Automation Selecting microcontroller Internal architecture of Microcontroller Applications

3. Introduction Automation The control of an industrial process (e.g manufacturing, production etc) by automatic rather that manual means is often called automation Automation can be defined as a technology that uses programmed commands to operate a given process

4. Basic building block diagram of Automation

5. Sensors/ Transducers Level Flow Pressure Temperature Humidity

6. Controllable applications Motors Solenoid valves Control valves

7. Display Input Parameters Set point Indication for Output (alarm)

8. Controller Takes Input Verifies the conditions Controls the equipment & Displays the output

9. Microcontrollers The prime use of a microcontroller : To control the operation of a machine using a fixed program that is stored in ROM and that does not change over the lifetime of the system

10. Typical Microcontrollers The most common microcontrollers are 8-bit. 4-bit are used in high volume very low cost applications 16 & 32 bit are used in high-end applications.� Typical clock frequencies are 12 - 24 MHz

11. Different manufacturers of microcontroller Intel Atmel Philips Dallas Semiconductors Microchip Motorola

12. Criteria for Selecting microcontroller meeting the computing needs of the task efficiently and cost effectively speed, the amount of ROM and RAM, the number of I/O ports and timers, size, packaging, power consumption easy to upgrade cost per unit availability of software development tools assemblers, debuggers, C compilers, emulator, simulator, technical support wide availability and reliable sources of the microcontrollers.

14. Test case: 8051

15. History of 8051 1981, Intel MCS-51 The 8051 became popular after Intel allowed other manufacturers to make and market an flavor of the 8051. different speed, amount of on-chip ROM code-compatible with the original 8051 form a 8051 family ? Intel ????????? 8051 IC ?, 8051 ???? popular.? Intel ????????? 8051 IC ?, 8051 ???? popular.

16. Block Diagram

19. MICROCONTROLLER I/O pins I/O pins are very useful for the following : reading Inputs/ reading keypads Displaying output controlling Motors (PWM) etc.

20. A Pin of Port 1

21. Writing �1� to Output Pin P1.X

22. Writing �0� to Output Pin P1.X

23. Reading �High� at Input Pin

24. Reading �Low� at Input Pin

25. 8051 Family Mask programmable factory fitted Programs OTP one time programmable User Programmable Reprogrammable User Reprogrammable

26. Comparison of the 8051 Family Members ROM type 8031 no ROM ; requires external Rom 80xx mask ROM 87xx EPROM 89xx Flash EEPROM 89xx 8951 8952 8953 8955 898252 891051 892051 Example (AT89C51,AT89LV51) AT= ATMEL(Manufacture) C = CMOS technology LV= Low Power(3.0v)

31. How to interface Devices Inputs and Outputs Compatibility of I/Os Impedance matching Selecting right microcontroller

32. General diagram of Automation

35. Controller Universal controllers Input in form of 0 ~5v 4 ~ 20mA 0 ~20mA Conversion using Transmitter Exp. Temperature transmitter, pressure transmitter. etc

36. Applications of microcontroller Personal information products: Cell phone, pager, watch, pocket recorder, calculator Laptop components: mouse, keyboard, modem, fax card, sound card, battery charger Home appliances: door lock, alarm clock, thermostat, air conditioner, TV remote, VCR, small refrigerator, exercise equipment, washer/dryer, microwave oven Industrial equipment: Temperature/pressure controllers, Counters, timers, RPM Controllers Toys: video games, cars, dolls, etc.

40. Sample projects