SCADA vs. HMI - Which to Use for Data Visualization?
As industrial automation systems continue to develop, the need for efficient data visualization tools has become increasingly important. Two popular platforms used for this purpose are SCADA and HMI. While both are used for data visualization, there are some differences between these platforms. In this article, we'll be comparing SCADA and HMI to determine which is best suited for your data visualization needs.
What is SCADA?
SCADA (Supervisory Control And Data Acquisition) is a system used to monitor and control industrial processes such as power generation, oil and gas pipelines, water treatment facilities, and many others.
SCADA systems consist of a central host computer or server and various remote terminals or RTUs (Remote Terminal Units) which are connected to PLCs (Programmable Logic Controllers) or other industrial controllers. The remote terminals collect data from the field equipment, which is then transmitted to the central host where it is processed and used for monitoring and control purposes.
What is HMI?
HMI (Human-Machine Interface) is a software application designed to provide a graphical representation of a control system, allowing an operator to interact with the system through a computer or touchscreen. An HMI system may include features for monitoring and controlling various aspects of equipment or machinery on an industrial site, as well as alarms, data logging, and other data visualization tools.
SCADA vs. HMI
Both SCADA and HMI systems are used for data visualization purposes, however, there are several differences between the two systems:
Scope of Application
SCADA systems are typically used for larger, more complex industrial processes, while HMI systems are better suited for smaller applications. This is because SCADA has the ability to control and monitor many different aspects of an industrial process, from initial inputs to final outputs. On the other hand, HMI systems are designed to provide a more simplistic view of a control system, focusing on a limited number of inputs and outputs.
User Interface
SCADA systems offer a more complex and feature-rich user interface than HMI systems. This is due to the fact that SCADA systems have a greater scope of application and need to present more data to the user. HMI systems, on the other hand, focus on providing an easy-to-use and intuitive user interface, suitable for operators who may not have extensive technical knowledge.
Cost
SCADA systems tend to be more expensive than HMI systems due to their complexity and the need for more advanced hardware and software components. HMI systems, on the other hand, can be simpler and more cost-effective due to their limited scope of application.
Data Collection and Analysis
SCADA systems have the ability to collect and analyze a large amount of data from across an entire industrial process. This is due to their ability to interface with many different types of sensors and equipment. HMI systems, on the other hand, may be limited in their ability to collect and analyze data due to their more limited interfaces.
Conclusion
Both SCADA and HMI systems have their own strengths and weaknesses when it comes to data visualization. Ultimately, the choice between these two systems will come down to the specific needs of your industrial process.
If you're running a larger, more complex industrial process with a need for extensive monitoring and control capabilities, SCADA may be your best choice. On the other hand, if you're looking for a simpler, more cost-effective solution for a smaller industrial process, an HMI system may be a better fit.
Regardless of which system you choose, proper data visualization is crucial for maintaining optimal industrial process performance.
References
- "What is SCADA?" High Tide Technologies, https://hightidetechnologies.com/what-is-scada/
- "What is an HMI? Human Machine Interface." Ignition SCADA Software & IIoT Platform, https://inductiveautomation.com/resources/glossary/hmi-human-machine-interface
- "SCADA vs HMI: The Differences Between the Two Systems." Aplex Technology Inc., https://www.aplextec.com/blog/scada-vs-hmi-the-differences-between-the-two-systems