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. Elettronica Veneta, 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