benefits of Programmable Logic Controller (PLC) | Automation

The First programmable logic controller (PLC)   specified in 1968 by the Hydromantic division of the General  Motors Crop. The first models name was invented.  the Second models came in 1970 communication abilities appears and third  Model came 1980 Standardization on  communication on protocols, 1990  Standardization on  programming language

PLCs are the main heart of the automation system. PLC is the controller used to control the plant, process, system, machine. A programmable logic controller (PLC)  is digital Programs use to be industrial computer that monitor Input, makes decisions and output to controls automate process Machine.

PLC control System :

Programmable logic controller (PLC) in industrial digital computer control system, input or output devices to control  and easy to make decisions, PLC controller is  used to control the plant/process/system/machine

Basic instructions :

Positive Logic                                                                                                                 

 True = logic 1 = input energized.

False = logic 0 = input NOT energized.

Negative Logic

True = logic 0 = input NOT energized

False = logic 1 = input energized.

Normally Open

(XIC) - eXamine If Closed.

Normally Closed

(XIO) - eXamine If Open

On Timer

(TON) - Timer ON.

Off Timer

(TOF)- Timer OFF

benefits the Programmable Logic Controller (PLC)  :

1  easily understood programming language

2  easily  to control switch (on/off)

3 easy to operate

4 easy to maintenance

5 high safely

6  timer and counter