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PLC and SCADA Systems form an integral part of a fully automated industrial system. PLCs are designed to derive inputs and control processes within their immediate environment. SCADA Systems are designed to exercise centralized control over all the networked processes involved in industrial automation, spread across even geographically separate regions. Programmable Logic Controllers and Their Role in Industrial Automation Programmable Logic Controllers (PLCs) are specialized computing systems designed for use in industrial processes. These systems can receive inputs from different sources, process them and use the outputs to control an equipment or a process. PLCs can range in size form small pocket-sized units to systems that need to be installed in large PLC Racks. They are designed to be tough and rugged enough to survive in an industrial environment. The PLC consists of a Central Processing Unit (CPU), power supply and rack, and Input/output sections. The basic unit consists of the rack and power supply. The racks come in different sizes to accommodate as many input and output modules as needed. The back of the Rack contains slots that allow the modules to communicate with the CPU. The CPU is generally placed beside the power supply in the unit. The CPU consists of all the integrated circuits that control the system. It contains the microprocessor, memory, storage, and communication circuits. Programming a PLC is a bit different from conventional programming. It uses lines and symbols to simulate an electrical circuit. The program is coded on the PC using special software. This logic is then downloaded into the PLC. The PLC code is called ladder logic as it resembles a ladder in appearance. PLC systems are specialized computers so they just run the one single program again and again, to monitor and control an industrial process. The program accepts inputs, processes them and then uses the output to manipulate the process. SCADA Systems and Their Role in Industrial Automation SCADA Systems are software systems that run on PCs and are used to monitor, control and manage the entire industrial automation system of an organization. They are commonly used in large operations where the various processes might be scattered over different locations. SCADA Systems are implemented in operations like water supply, power management, manufacturing, traffic control, and mass transit system. The Supervisory Control and Data Acquisition (SCADA) systems collect data from various automated processes and send them to a centralized control system. Here, the data can be used to modify the processes automatically, or display the information to a human operator. The operator can take decisions based on the data and then change a few modifiable parameters to control any part of the automation process that needs a change. The SCADA system consists of Remote Terminal Units or PLCs, networks, communication systems and Human Machine Interface. The system collects data from PLCs and other process control systems and sends the data on to the central control system. The data is gathered and decisions taken in real time to exercise accurate control over processes. This helps in making the job easier for humans in charge of monitoring the various industrial operations and ensuring they all work together properly. For any part of the system that might need human intervention, the relevant data is displayed in a HMI (Human Machine Interface). The person in-charge of that operation can then change the needed parameters to effect a change in the process. PLC and SCADA systems work together to monitor and control industrial processes and collect data about these processes. The data is then used to make changes in processes or displayed to a human for decision making. These hardware and software systems work together to smoothly manage an organization’s entire industrial operation. Industrial Automation Training To get a deep understanding of how PLC and SCADA systems works, one can undergo from a PLC SCADA training institute in Noida. There are many PLC SCADA training institutes who render SCADA training in India or Automation training in Noida. However one should opt for the Best PLC SCADA training institute which offers industrial automation training & certification and covers all automation trainings in Noida such as Panel Designing training in Noida; LabView Training in Delhi/NCR and DCS, HMI & Drives, Industrial Networking, PID and P& ID, IBMS & HVAC Design Training.
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