ppt plc 2010 original

Views:
 
     
 

Presentation Description

No description available.

Comments

Presentation Transcript

Programmable Logic Controller (PLC) By:- Richa Dwivedi Heena Kausar CSE (Computer science engineering) 2nd year   :

Programmable Logic Controller ( PLC) By:- Richa Dwivedi Heena Kausar CSE (Computer science engineering) 2 nd year

1.Intorduction 2.History and Origin 3.Advantages and Disadvantages 4.How it Works >Components > Operation :

1.Intorduction 2.History and Origin 3.Advantages and Disadvantages 4.How it Works >Components > Operation Outline:

:

A programmable logic controller ( PLC ) is a digital computer used for automation of electromechanical processes, such as control of machinery on factory assembly lines, control of amusement rides, or control of lighting fixtures. Introduction :

PowerPoint Presentation:

Developed to replace relays in the late 1960s PLC began in the 1970s, and has become the most common choice for manufacturing controls. The PLC was invented in response to the needs of the American automotive manufacturing industry (primarily General motors). Costs dropped and became popular by 1980s Now used in many industrial designs History and Origin:

PowerPoint Presentation:

Cost effective for controlling complex systems. Flexible and can be reapplied to control other systems quickly and easily. Computational abilities allow more sophisticated control. Trouble shooting aids make programming easier and reduce downtime. Reliable components make these likely to operate for years before failure. Advantages:

PowerPoint Presentation:

Too much work required in connecting wires. Difficulty with changes or replacements. Difficulty in finding errors; requiring skillful work force. Disadvantages

PLCs’ Applications:

PLCs’ Applications

PowerPoint Presentation:

How it works >PLC Components :

PowerPoint Presentation:

CPU: is the unit containing the microprocessor Power supply unit: is needed to convert the mains A.C. voltage to low D.C. Voltage(Normally Internal)

PowerPoint Presentation:

PLC Operation: The PLC program is executed as part of a repetitive process referred to as a scan. A PLC scan starts with the CPU reading the status of inputs. The application program is executed using the status of the inputs. Once the program is completed, the CPU performs internal diagnostics and communication tasks. The scan cycle ends by updating the outputs, then starts over. The cycle time depends on the size of the program, the number of I/Os, and the amount of communication required.

PowerPoint Presentation:

THANK YOU

authorStream Live Help