Innovative Thinking

Almost 85% of legacy devices being used for industrial automation do not possess the ability to communicate with each other. Why? The manufacturers never thought about cross-platform compatibility. The percentage has fallen where modern devices are concerned, but the industry is still highly reliant on legacy infrastructure. This has made gathering data into one program an extremely difficult task.

Some companies are developing hardware and software that can work as a cross-platform channel for a multitude of protocols. Devices making their way onto the market tend to offer “smart connectivity”. The automation community has reached a consensus over the term and defines it as a device’s ability to connect to and be controlled from a plethora of devices over the internet. The challenge that still haunts SIs is monitoring age-old equipment that hasn’t reached an expiration date.

Developing efficient HMI screens can make life for both the screen developer and the user a lot easier if they are developed properly. As an HMI programmer, you need to understand the user’s needs: what information is important for them to see in order for them to do their job efficiently and react appropriately.  

So, normally it is a good idea to watch what the operator has to do in order to do their job and discuss with them what would make their job easier. Go over any ideas you may have about screen layouts, how buttons would be laid out on the screens, etc., before you even begin developing screens. Getting the operator to “buy in” to an HMI system is key, otherwise you will have failed before you even get started.

As an automation engineer, I have worked on HMI programming for many automation applications, from system integration projects to production data collection. 

Here are the top 5 guidelines I follow to create the most effective HMIs:

Many beginner automation enthusiasts often fail to establish appreciable differences between Supervisory Control & Data Acquisition (SCADA) and Human Machine Interfaces (HMIs). They often confuse both these entities as being similar and working for the same end-result. While the latter may be true, as in the end achieving automation is the desired result, the two terms are quite different and have limited overlap.

As the manufacturing world rapidly modernizes, manufacturers must be at the top of their games from broad new strategies to fine-tuned details. Today, there are sensor products on the market that allow for remote monitoring for everything from home utilities and amenities such as a pool to security systems. Many set-ups are as simple as loading up an app on a tablet or smartphone.

While this is indeed a positive change, HMIs must link to remote access to evolve as a useful tool. Going beyond simple monitoring and interaction, HMIs create a hub of control that many pieces of technology, such as older sensor products and other systems, often lack. In addition, most of today’s HMI systems are web-based, meaning that open standards are beginning to become a relevant powerhouse in the industrial market once again.

HMIs, or human-machine interfaces, allow easy control and interaction between operator and machine. However, the data they collect can be underutilized. This is why integrating historians with HMIs is recognized as an effective data collection method.

Historians are software for data collection which can then be stored in spreadsheets, files, and other database products. This allows the information to be accessible for reporting on different trends and to refer back to later on. HMIs allow the data to be seen in real time before the historian software records it, as well as historical data replay if the HMI/SCADA is set up properly.

There’s no single way to do something right. Instead there are multiple paths of which the most suitable one must be chosen according to the situation. HMIs play a vital role in driving the industrial bandwagon, providing us with monitoring, control & automation capabilities. When working with HMIs, there are a few factors that you should be particularly careful about. All of these have been discussed in detail below.

At one point or another, a manufacturing company looking to automate their systems would require the services of a System Integrator (SI). Knowing about the traits and practices of a good System Integrator can go a long way, and help build a system that pays itself off with the passage of time.

Winners of the 2017 System Integrator of the Year award were asked to provide valuable advance on system designs and technologies including HMIs, wireless, cloud, Industrial IoT, etc. so that others may get better insight and get acquainted with best practices.

How do you keep up with your processes – walking from machine to machine?

Integrating your HMIs (Human Machine Interfaces) into an Ethernet networked control system gives you a centralized window into your entire process. It works by gathering data from the control system and distributing it to different areas of the facility. One PC at an operator station or in a control room can lay out real-time processes, report data over time, and make live adjustments to day-to-day operation.

HMI Server/Client Configuration breaks down into just two components: Servers and Clients.