September 2024
Digital Features
Oil and gas web client computing devices facilitate integration of web-based HMI/SCADA applications
Operators in oil and gas manufacturing facilities have long depended on human machine interfaces (HMI) to offer a visual summary of process systems that simplifies the monitoring of crucial status and control data. A well-crafted graphical user interface enhances situational awareness, decreases workload and empowers operators to oversee the entire process, facilitating their focus to quickly address any abnormal scenarios.
Operators in oil and gas manufacturing facilities have long depended on human machine interfaces (HMI) to offer a visual summary of process systems that simplifies the monitoring of crucial status and control data. A well-crafted graphical user interface enhances situational awareness, decreases workload and empowers operators to oversee the entire process, facilitating their focus to quickly address any abnormal scenarios.
Most HMI/supervisory control and data acquisition (SCADA) software runs on a dedicated computer system. Today, sophisticated web server technology facilitates access to HMI screens and the viewing of SCADA systems. Newer programmable logic controllers (PLCs) and remote terminal units (RTUs) frequently incorporate web servers that allow diagnostics and monitoring via browsers, as well.
Facilitating implementation of web-based HMIs. Historically, HMI/SCADA client software has run on a dedicated computer with a compatible operating system installed that exhibited slow loading times during startup and restart procedures. This reduced productivity on a routine basis, cutting into valuable production time. Updating and maintaining software on individual personal computers (PCs) resulted in higher cost of ownership and even more downtime.
Fortunately, web-based applications have revolutionized accessibility by enabling connectivity from any location using a web browser. Still, for petrochemical manufacturers, the integration of the HMI presented several challenges.
When standard web browsers are used, operators must open a browser and type a long website address to be routed to a specific program. Users have the liberty to explore various unrelated websites, as well, but this only exposes the system to potential risks inherent in online browsing activities.
Now, manufacturers can optimize operations by utilizing software-enabled web clients to streamline web-based HMI implementation. The best solutions involve touchscreen displays that can serve up HMI pages on multiple monitors, in multiple split-screen configurations or on cloned workstations to streamline the management of equipment across the production line.
For example, the author’s company has introduced a web-client computera that is designed to serve as the display or control panel for web-enabled PLCs, HMI systems and IP cameras.
The author’s company designed the interface to automatically connect with the assigned web pages without opening a browser and entering an address. After initial setup, the browser automatically launches with the assigned web link after turning on the PC’s power or restarting the system, so the operator gets to the needed information much faster.
Hybrid remote desktop services (RDS) and web-based applications can also be launched simultaneously, when needed. The web client supports clones, duplicate screens and multi-screen. Touch screen is supported, as well. The applications can be displayed one-by-one by toggling a hot key, or all applications can be displayed by split screen. For data security, the USB drive function is disabled automatically after the system boot up. No external USB drive can be used to download or upload data.
In addition, the author’s company prevents access to other sites or browser features. The operator can only see what is displayed on the screen and cannot change anything beyond the intended HMI pages.
When troubleshooting is necessary, the author’s company’s technologya can be securely accessed using interactive remote mirroring by an administrator. The approach facilitates installation of a wide range of ruggedized computers, panel PCs, monitors and KVM. To promote efficient use in space constrained areas, various types of mounts are available, including pendant arm, wall, pedestal, ceiling and VESA.
When web client computers, panel PCs or mobile workstations must be customized to the oil and gas manufacturer’s process, this can be accommodated as well. If there are unique requirements such as space constraints, the system can be designed to fit the company’s needs. In approximately 6 mos–8 mos, the first articles for approval can be delivered, followed by production of the equipment.
As petrochemical manufacturing facilities continue to actively explore new avenues to enhance productivity, the utilization of web-based HMIs on industrial-grade computers can significantly boost efficiency. This innovative solution, characterized by streamlined and adaptable display features and improved security measures promises to enhance the profitability and productivity of plant operations in the years ahead.
NOTE
a Artista’s Q8 Edge
* Del Williams is a Technical Writer on behalf of ARISTA Corporation.
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