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MEASUREMENTS and CONTROL LAB. 0908448

MEASUREMENTS and CONTROL LAB. 0908448. CONTROL EXPERIMENTS. List of Experiments. DC Servo Motor Control. Twin Rotor Control. Pneumatic and Electro-Pneumatic System Control. Programmable logic Controllers PLCs. System Identification. Introduction to PLC and Ladder Logic. OBJECTIVES:

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MEASUREMENTS and CONTROL LAB. 0908448

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  1. MEASUREMENTS and CONTROL LAB. 0908448 CONTROL EXPERIMENTS

  2. List of Experiments • DC Servo Motor Control. • Twin Rotor Control. • Pneumatic and Electro-Pneumatic System Control. • Programmable logic Controllers PLCs. • System Identification.

  3. Introduction to PLC and Ladder Logic • OBJECTIVES: The aim of this experiment is to familiarize the student with Programmable Logic Controllers (PLC) as hardware and the software used to program it, also to familiarize him with programming PLC using ladder logic diagrams.

  4. ElettronicaVeneta, Programmable Logic Controller Trainer.

  5. PLC Brands: • Siemens • Allen-Bradley • ABB • Mitsubishi • Omron • Honeywell • Schneider Electric • General Electric

  6. In this experiment we will use: • PLC SIEMENS SIMANTIC S7-200 • Digital expansion EM 222 • Analog input/output module EM 235

  7. PLC SIEMENS S7-200 • Digital Inputs: I0.0-I0.7 and I1.0-I1.5 • Digital Outputs: Q0.0-Q0.7 and Q1.0-Q1.1 • Internal relays 256: M0.0-M31.7 • Counters/Timers 256/256: C0-C255, T0-T255 • Number of expansion modules 7 modules, types of expansion modules: • Discrete Input / Output • Analog Input / Output • RTD / Thermocouple input • PROFIBUS-DP slave • AS-Interface master • Ethernet • Internet • Modem • Positioning

  8. Expansion Modules • Digital expansion EM 222 • 8 Points, 24 VDC Digital Output Module. • Analog input/output module EM 235 • 4 AI / 1 AO 12 bit

  9. LADDER LOGIC • It is a very popular graphical language for programming Programmable Logic Controllers (PLCs), Ladder Logic based on drawing electrical logic schematics to implement Boolean expressions. The Ladder Diagrams consists of graphic symbols, representing logic expressions, and contacts and coils, representing outputs.

  10. Rungs and Rails

  11. Normally Open Contact

  12. Normally Closed Contact

  13. OR Gate

  14. AND Gate

  15. NOT Gate

  16. Latching

  17. Programming the PLC • To program the PLC, we will use the STEP7-Micro/WIN software • We can program the PLC using: • Ladder Diagram • If statements • Block diagrams

  18. OUTPUT RELAY

  19. MOTOR CONTROL CIRCUITS

  20. MOTOR CONTROL CIRCUITS

  21. TIMERS • On-Delay Timer

  22. TIMERS • Off-Delay Timer

  23. TIMERS

  24. Counters • Count Up Counter • Count Down Counter • Counter ranges:Cxxx=C0 through C255

  25. THE END

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