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What Are The Differences Between PLC And SCADA?

    Automation processes are fundamental in most industries nowadays. This includes but is not limited to the manufacturing, instrumentation and electrical industries. Automation has become prevalent and PLCs are in use in a lot of cases. Knowing PLC and SCADA is important if you plan to work in any of those fields that require automation.

    PLC and SCADA

    Programmable Logical Controller (PLC)

    A programmable logic controller (PLC) is a digital industrial computer control system that automates processes. It’s computerised, preprogrammed, and ruggedized.

    The fundamental benefit of a PLC is its ability to adjust and reproduce certain actions while gathering or transmitting crucial data. Another benefit of a PLC is its adaptability. To suit their unique needs, the customer can choose from a whole gamut of input and output devices.

    Supervisory Control and Data Acquisition (SCADA)

    An industrial control system called SCADA (Supervisory Control and Data Acquisition) can be used to remotely or on-site monitor activities in factories and plants.

    It’s an automated system that operates pumps, motors, sensors, valves, pumps, and any other instrument inside a process operated by a human operator.

    Importance / Advantages of PLC and SCADA

    Automation procedures have quickly become a vital element for many businesses’ overall processes, particularly in the instrumentation and electrical industries. 

    What are the benefits/advantages of PLC?

    • Flexible logic that is easy to update
    • Low usage of electricity
    • Easy maintenance due to modular assembly
    • Diagnostic and fault-finding capabilities
    • Capable of performing extremely complex logic computations
    • Adequate documentation facilities
    • Computers are simple to combine with the process.
    • It has Analog signal handling and close-loop control programming
    • Counter, timer and comparator can be programmed

    What are the benefits/advantages of SCADA?

    •  Can be monitored from a remote location 24/7
    •  Can reduce costs normally associated with man-power
    •  Can create a reliable automated system working 24/7
    •  Logging of data
    •  If well-designed, a user-friendly interface

    What are the main differences between PLC and SCADA?

    They are 2 separate systems : 

    • One is hardware (PLC) and the other one is usually software used on a computer (SCADA)
    • PLC is used for local systems and SCADA works best for remote systems
    • PLCs can control large industrial machinery whereas SCADA is more suited to trigger automation and monitor data at a larger scale
    • They both work together – PLC collects local data and SCADA monitors the activity of PLCs. It is not about choosing one but more about making both work together for more efficiency and security
    PLC versus SCADA

    Why should you undertake PLC & SCADA training?

    Students who have completed PLC and SCADA training are qualified to maintain PLCs in water treatment plants, substations, and switchyards, among other places. PLC & SCADA are used in various factories to control and monitor all processes of each piece of equipment, whether it’s a generator, boiler, turbine, valve, or motor. Automation engineers are qualified to work in the following domains after gaining practical expertise in them.

    • Coal-fired plants that generate electricity
    • Oil and Gas production factories
    • Refineries for petrochemicals
    • Cement Plants
    • Steel plants
    • Food processing plants
    • Manufacturing Units
    • Automobile industries
    • Paper industries
    • Textile industries

    In these industries, machines and robots are often used to fulfil certain tasks. Automation engineers are in charge of developing, programming, simulating and testing automated machinery and processes to the requirements of the product.

    PLC & SCADA Training

    The world is moving towards automation and it is the right time to start your career in PLC & SCADA. We have a variety of PLC training options, and you can choose depending on your necessity.

    PLC and SCADA courses are short courses, you can do them while you are doing 

    You can do our PLC courses 100% online or decide to undertake blended training eg. do the theory online from home and come to our facilities for the practicals. You could also come to our facilities for the whole duration of the course. You can choose your hours and begin the course at any time using our e-learning platform. You are welcome to visit our facilities whenever you choose during our open hours. The 100% online option is ideal for people who are self-motivated and want flexibility around their work and life schedules. 

    Please see below the range of courses we offer for PLC and SCADA training at Ausinet :

    Those qualifications may also include PLC and SCADA training :

    Please feel free to contact us at for more information or if you have any questions

    Last reviewed date: 19/06/2024

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