What is PLC in Industrial Automation?
PLC stands for Programmable Logic Controller. It is a ruggedized computer utilized for industrial automation processes. PLC can automate a precise process, functions of machine function, or a complete production line.
The working process of PLC
The PLC collects information from linked sensors or input devices, routes the data, and prompts outputs on the basis of pre-programmed parameters.
PLC are able to check and record run-time based on the inputs and outputs. It often checks and records machine productivity or working temperature, automatically on and off processes, made alarms if a machine breaks down, and more. PLCs are a flexible and vigorous control solution, adjustable to almost all applications. Check out examples of PLC at CM Industry Supply Automation
Some of the important features that set Programmable Logic Controllers apart from microcontrollers, industrial PCs, and more industrial control solutions are:
Input/Output – The CPU of the PLC stores and programs data, but i/o modules linked the PLC to the rest of the machine; these Input/output modules offer information to the CPU and activate particular results. Input/output is either analog or digital. Input devices consist of switches, sensors, and meters. Output devices consist of lights, relays, drives, and valves. Users can blend and match an input/output of PLC to get the correct configuration for the application they are using.
Communications – Along with input and output devices, a PLC connects with different systems such as users who might wish to export application data documented by the PLC to a SCADA (supervisory control and data acquisition) system that check multiple connected devices. PLCs provide ports and communication protocols to make sure that they can communicate with different systems easily.
HMI – For interacting with the PLC in real-time, users require HMI (Human Machine Interface). These operator interfaces can be plain displays including text-readout and keypad, or big touchscreen panels like consumer electronics, however anyway, they enable a consumer to review and input information to the Programmable Logic Controller in real-time.
Advanced Features of PLC
Today the Industrial Internet of Things (IoT), and Industry 4.0 programmable controllers are set to communicate data through the Web browser, linked to databases through SQL, and also the cloud data through MQTT.
The All-In-One PLC
An All-in-One PLC put together the controller with the Human Machine Interface panel, making a compact, user-friendly automation solution. Now users are not required to establish PLC to panel communications. Also, they can program HMI design and the Ladder Logic in a sole software setting. An all-in-one way saves time, cuts down wiring, and reduces the price of buying multiple devices.
PLC Programming Method
PLC programs are often written on a computer. Later the programs are downloaded to the controller. Most of the programming software of PLC provides programming in Ladder Logic, or “C”. Ladder Logic is the conventional programming language. It imitates circuit diagrams including rungs of logic read left to right. Each rung denotes a particular action controlled by the Programmable Logic Controller, beginning with input or series of inputs that cause an output (coil). Due to its illustration nature, Ladder Logic is easy to implement than lots of different programming languages.
Recent innovations are “C” programming.
Some manufacturers of PLC use supply control programming software.
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