Importance of programmable logic controller in Industrial Automation

Programmable logic controller It’s an electronic process control device and is grounded on sense, defined through a computer program.


Its history dates back to the late 1960s, when the assiduity looked to new electronic technologies for a more effective result to replace control systems grounded on electrical circuits with relays, switches, and other factors generally used to control systems. of conventional sense

Robotization Goals

1- Produce harmonious quality
2- Give necessary quantities at the right time
3- Increase the productivity and inflexibility of the tool
Literal Review of Robotization

The first simple machines substituted one form of trouble for another that was handled by humans. Similar as lifting a heavy weight with a pulley system or with a switch. So the machines were latterly suitable to substitute natural forms of renewable energy, similar as the wind, runs, or flowing water, for mortal energy.
Sailing boats replaced rowboats. Still latterly, some forms of robotization were controlled by clockwork or analogous bias using some form of artificial power source, some spring, a conducted inflow of water or brume to produce simple and repetitious conduct, similar as moving numbers, creating music, or games. Thoug these bias characterized mortal numbers, were known as automatons and conceivably date from 300 BC.

Robotization of artificial processes

The position of robotization of any artificial process is a content of great applicability in the contemporary world. As it implies the negotiation of homemade operations for computer systems, since any task is carried out by machines rather of people. So it also means increased labor productivity, dropped material costs, increased product quality and bettered working and living conditions for workers. Automating assiduity processes is the use of motorized systems or rudiments to control ministry and/ or artificial processes, replacing mortal drivers. Hence the robotization of processes, where mortal drivers are handed with mechanisms to help them in the physical sweats of work, and the sensitive and internal requirements of the person are greatly reduced.

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Advantages of using a PLC

The advantages in the use of the programmable logic controller compared to systems grounded on relay or electromechanical systems are

So the inflexibility possibility of replacing the wired sense of a board or a published circuit of an electronic system, by means of a winproladder programming examples that runs in a programmable logic controller.
So the time saving of work time in the connections to be made, in the launch-up and in the adaptation of the system.
Changes Installation to make changes during the operation of the system.

Operation of a PLC

In order to explain the operation of a programmable logic controller. It’s necessary to first define the corridor · Input and affair interfaces · CPU (Central Processing Unit) · Memory · Programming Bias The program is entered into the PLC through the applicable device (a haul program or PC) and this is stored in the memory of the CPU, which constitutes the program that the regulator will execute during its operation.
So the CPU, constitutes the” brain”of the programmable logic controller, processes the information it receives from the outside coming from the different detectors through the input interface and according to the program, emits an affair through the affair interface with which it’s possible to act on the process.

Colorful external bias can be connected to the input modules, similar as
Inductive, capacitive, optic detectors
. switches
race ends
propinquity sensors
External bias can be connected to the affair modules to act directly on the process, similar as.
Solenoid faucets
Variable speed drives
The CPU works cyclically executing the program, at the morning of the cycle. Followed by executing the program, also the CPU executes internal individual and communication tasks.  Formerly at the end of the cycle the signals are streamlined labors with which the process is acted upon. So the cycle time depends on the size and complexity of the program. The number of inputs and labors, and the quantum of communication needed.


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