What is the difference between scada and hmi

DCSs can also be used in Continuous and Batch-based Process Control, and may or may not have proprietary components throughout the whole system.

Share this page:. Share this page on All about Visualization general. Presales info. Follow us on Twitter Youtube. Rate 0. What is the main difference between scada and hmi? Suggestion To thank Quote Answer. Rate 2. The controlling mechanisms are electronic circuits known as programmable logic circuits or PLCs. The PLC controls the machine as well as polls the sensors for data. The data is then sent to the control room.

In the control room, the operator needs to make sense of the data as well as issue commands like turning the machines on or off. The HMI is usually a graphical layout of the entire system with gauges, lights, and controls situated in the corresponding locations of the machines.

The gauges show the normal range of operation as well as the abnormal range so that the operator knows if the equipment is within the accepted operating range. The lights may indicate if the machine is working or not, as well as the occurrence of faults. The controls send the instructions to the PLC, which in turn control the machine.

But in general operation, most of its parts are not really to be dealt with on a regular basis. The majority of the time, only the HMI is visible and interacted with. This makes people think that SCADA and HMI are the same or are different implementations of the same system, when one is just an integral part of the other.

Cite APA 7 , l. However, most industries today often rely heavily on data processing and therefore implement SCADA solutions. The presence of terms such as alarm logging, production management and data historian imply that a SCADA system is in the works. Process control industries offer great examples of SCADA systems due to the complexity of operations. With the progression in automation technologies , the need for full-blown SCADA systems is becoming imperative.

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