Programmable Logic Controller( PLC )
- 1. GMRInstituteofTechnology2-Oct-19 12-Oct-19 1 1 2-Oct-19 GMR Institute of Technology, Rajam PROGRAMMABLE LOGIC CONTROLLERS Prepared by Name : PISINI SEKHAR Jntu No : 17341A0282 Department Of EEE
- 2. GMRInstituteofTechnology Industrial Automation Basics of Hardware & Control Components Introduction of Programmable Logic Controller (PLC) Programming with SIMATIC manager software Programme Using LADDER (LAD) Language 2-Oct-19 2 CONTENT
- 3. GMRInstituteofTechnology Industrial Automation 2-Oct-19 3 Automation= “moves its self” Automation is a set of technologies that results in operation of machines and systems without significant human intervention and achieves performance superior to manual operation. Levels: • Supervisor level e.g., IPC • Control level e.g., PLC • Field level e.g., components Advantage: • Energy Savings • Safety improvement • Product quality • Better environmental performance
- 4. GMRInstituteofTechnology Basics of Hardware & Control Components A wide variety of Hardware components are used in control circuits. 2-Oct-19 4 Switch Push buttons Toggle switch Limit Switch Selector Switch Led Sensors
- 5. GMRInstituteofTechnology2-Oct-19 5 • With the help of 24 V AC/DC contactors can control up to 600 V AC • Relays often have normally closed contacts; contactors usually do not (when de-energized, there is no connection) • Switching times are much faster for relays • A relay is an electrically operated switch • Contactor is a device which can control the higher amount of ‘I’ & ‘V’ with the help of lower amount of ‘I’ &’V’. Same relay also but ,there is a difference in Arrangement.
- 6. GMRInstituteofTechnology Introduction of Programmable Logic Controller (PLC) History of the PLC: • GMC ---- BEDFORD ASSOCIATES --- MODICON 084 (Richard Dick Morley,1969) • Allen Bradley (U.S.A) --- PLC (Rockwell solution) What is a PLC? • A special computer device used for industrial control systems. • e.g., oil refineries, manufacturing lines, conveyor systems & so on. • The components that make a PLC work. • The power supply and rack • The central processing unit (CPU) • The input/output (I/O) section 2-Oct-19 6
- 8. GMRInstituteofTechnology Communications of PLCs –Module to Module, PC to PLC, PLC to PLC. Advantages of PLC’s:- PLCs not only are capable of performing the same tasks as hard-wired control, but are also capable of many more complex applications. • Smaller physical size then hard-wire solutions • Easier and faster to make changes • PLCs have integrated diagnostics and override functions • Diagnostics are centrally available • Applications can be immediately documented • Applications can be duplicated faster and less expensively 2-Oct-19 8
- 9. GMRInstituteofTechnology SIMATIC manager software The SIMATIC manager is the basic application by which we can perform the following functions in SIMATIC manager. • Set up project • Configure and assign parameter to hardware network • Debug and commission our programs Varies versions of the STEP 7 Standard package: • STEP 7 Micro/DOS and STEP 7 Micro/Win for simpler stand-alone applications on the SIMATIC S7-200. • STEP 7 for applications on SIMATIC S7-300/S7-400 with a wider range of functions. 2-Oct-19 9
- 10. GMRInstituteofTechnology Allen Bradley PLCs (AB) ABB PLCs (Asea Brown Boveri) Siemens PLCs Omron PLCs Mitsubishi PLCs Hitachi PLCs Delta PLCs General Electric (GE) PLCs Honeywell PLCs Modicon PLCs Schneider Electric PLCs Bosch PLCs 2-Oct-19 10 *Some of the manufacturers or types of PLCs: Siemens (German)
- 11. GMRInstituteofTechnology Programming Language: • Ladder (LAD) • Statement list (STL) • Function block diagrams (FBD) Ladder: • Basic programming language. 2-Oct-19 11 NO NC COIL
Editor's Notes
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