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⌚Timestamps:
00:00 - Intro
00:54 - A poorly designed HMI
01:56 - HMI design requirements
03:14 - ISA101 HMI design standard
03:58 - Proper use of color
04:59 - Use of information over data
05:34 - High-performance HMI trends
06:02 - Keeping the screen simple
07:03 - High-performance HMI display hierarchy
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High-Performance HMI is the industry answer for a standardized, easy-to-use, and more productive HMI graphics system to implement and in some cases, replace a poorly designed HMI.
A properly designed HMI will support a smooth and stable operation of the process as well as notify the operator of an abnormal condition. However, this isn’t always the case.
Many HMIs were poorly designed, leading to situations that can compromise safety, quality, and profitability.
Many current HMIs make use of a broad spectrum of colors, unnecessary graphics, visual distractions, and lack of overall situational awareness.
These, in turn, can result in negative consequences.
Some of these consequences can include poor operating procedures, such as running by the alarms, where an operator is only responding to alarms and not understanding the root cause of the alarm conditions.
In the worst cases, a poorly designed HMI has been identified as a contributing factor in some industrial accidents.
Early HMIs were simple depictions of the P&ID of the process that they were controlling and monitoring. This was mostly from the limitations of the computing and graphics power of the times.
There are HMIs all around the world with inconsistent navigation, difficult to understand data being presented, improper alarm depictions, and a lack of display methodologies presenting the state of the operating equipment.
Let’s move away from these HMIs and learn about the High-Performance HMI.
In 2003, the International Society of Automation, or ISA, tasked a group of end-users, operators, and engineers to start working on a standard.
In 2015, twelve years later, they published the ISA-101 HMI Design Standard. It is the set of guidelines, principles, and philosophies for developing graphics on a process HMI.
Here we are going to cover the basic concepts of High-Performance HMI.
- One concept is the proper use of color. Moving away from the intense and colorful graphics, the High-Performance HMI is developed in grayscale, with color intended to be the attention-getter.
- Another concept is the use of information over data. Many HMIs will have dozens or more data points visible on the screen, but nothing for an operator to determine what that data means.
Speaking of trends, we now are seeing embedded or always visible trends on important process variables. By making these trends always visible, the operator can see a quick overview of historical data and evaluate for any necessary process adjustments.
- A very important concept in High-Performance HMI is keeping the screen simple and uncluttered. A simple depiction of a vessel with a valve and pump is all that is necessary.
There is no need to show bulkhead fittings, flanges, or non-essential 3D pipe objects. Instead, an ISA valve and pump, using a line to depict process flow are the standards.
Proper display hierarchy is critical to a High-Performance HMI. By creating a hierarchical system of displays, the operators can have overall situational awareness, and the ability to drill down to very specific data points when necessary.
1) Overall situational awareness
2) More detailed view
3) Equipment details
4) Diagnostics
Some of the graphics and the HMI screens used in this video are from the High-Performance HMI handbook which is a great reference if you want to dig deeper into this topic: amzn.to/2VKiDLA
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High-Performance HMI Design Basics realpars.com/hmi-design
Development of High-Performance HMI Philosophy realpars.com/hmi-philosophy
Detailed Design Principles of High-Performance HMI Displays realpars.com/hmi-display
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6 июл 2024
