PLC AND ITS APPLICATION - 123seminarsonly.com

PLC AND ITS APPLICATION - 123seminarsonly.com

PLC AND ITS APPLICATION Prepared By : [1] Introduction PLC(Programmable Logic Controller)

Advantages of PLC Programming--- Ladder diagram PLC in batch processing & others Current trends in the industry [2] PLC(PROGRAMMABLE LOGIC CONTROLLERS) 1. Replaces relays as logic elements. 2. Software oriented.

3. Fixed number of input-outputs/PLC . 4. Programmable. 5. Each I/O can be used as many times as necessary. 6. Downloaded from PC by a cable by the programming port . [3] SCAN PROCESS OF A PLC Steps in PLC scan process I/P processing Program processing O/p processing

[4] Advantages Of PLC: 1. 2. 3. 4. 5. 6. Flexible

Cost effective . Greater Computational abilities. Trouble shooting easier. Reduce downtime. Reliable. [5] PLC Programming Ladder programming is mostly used Ladder Programming has

Hot rail Neutral line Rungs Input Output [6] Batch Processing [7]

Ladder Diagram For Batch Processing (VALVE1) [8] Ladder Diagram (VALVE2) [9] Speed Control Of A Motor [10]

Applications Of PLC 1. Petrochemical industry --crude separation etc.. 2. Steel industry-- smelter operations, blast furnace, temperature monitoring etc. 3. Power generation -- boiler control from water injection, temperature, fuel, steam flow monitoring etc. 4. Process industries --air flow control, controlling air-fuel ratios etc. 5. Chemical industries-- proportion of chemicals . 6. Nuclear power generation plants . 7. Home automation .

8. PLCs in all phases of automated industrializations. [11] Different PLCs GEFANUC Inputs14 Outputs10 Software usedVersapro (Windows gui) Power supply24v MESSUNG

Inputs8 Outputs6 Software usedDoxmini (dos) Power supply24v [12] Current Trends in the Industry Smart" PLCs microprocessors memory.

Multitasking. Multiaxis control with sophisticated vision systems . Hardened programmers development

Menu-driven software and concurrent operating systems. Online & offline software

[13] Conclusion Hence we see that PLC are widely used in industries. PLCs have been gaining popularity on the factory floor and will remain predominant for some time to come.

Future of advanced automation. Better control and management achieved. [14] [15]

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