Industrial Automation

Industrial Automation

In general, PLC is an electronic device which is designed to be used in industry. PLC verifies functions written in accordance with digital principles, inspects a system or system groups with input/output cards and provides general control with its timing, counting, storing, and arithmetic operation functions. Arithmetical operation capabilities have been added to PLCs later on and these devices have been enabled to be used also in feeder control systems. PLC detects physical events, changes and motions in an area with various measurement devices, evaluates the data in accordance with the user program and reflects the results it obtains as a result of logical operations to the area through the components it commands: Data coming from the area are the signal forms of actions in the media. These data can be analog or digital. These signals may arrive at a contactor from a transducer. If the data is analog, the inquiry can be made for a certain interval of the value; if it is digital, inquiry can be made in accordance with whether there is signal or not.

These sensing events can be made with input cards and intervention events can be made with output cards. The systems to be controlled by PLC may differ in size. Solely a machine can be controlled as well as commanding a factory completely. The only difference is the capacity of the controller used. Today, PLCs are used in every sector one can imagine. PLCs, which are used in a large scale of sectors including chemistry, food, production lines, storing systems, markets and refineries, deserve their current place in control engineering. Developing PLC technology in parallel with rapid developments in electronic sector provides new perspectives for engineers in the automation sector.