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A Basic Guide to Human-Machine Interface (HMI)

• Posted by tony morgan July 4, 2022 Filed in Business #controls  9 views
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  Human-Machine Interfaces (HMIs) are an excellent tool for manufacturers to improve their production process.

   

  They provide a centralized location for production data and interacting with machines.

   

  The progression from batch-processing in the 1950s to their software capabilities today make HMIs a handy tool for operators, engineers, and other professionals working on the manufacturing line. Read more about HMIs and how they will benefit your production line below.

   

   

  What is an HMI and what are they used for?

  HMI stands for Human-Machine Interface. It’s an electronic dashboard connecting the user to a machine or device. HMIs include anything that connects to a machine, from MP3 players to industrial equipment.

   

  HMIs are used for all sorts of machines, systems, and devices. They create a centralized control center to view data and perform more sophisticated operations, such as turning machines on or off, by communicating with Programmable Logic Controllers (PLCs) and input/output sensors. HMIs must be durable enough to handle fluctuating temperatures, moisture, and industrial environmental factors like hazardous chemicals.

   

  HMIs make the industrial process more efficient by providing operators with live data and preventing human error.

   

  Types of HMIs

  There are three types of HMIs: data handlers, pushbutton replacers, and overseers. All three have the basic functionality of HMIs, but each type has specific capabilities for different processes.

   

  Data Handlers

  These HMIs are a tool for capturing data from a system, such as alarm handling. They are typically large to create graphs or other visual representations.

   

  Pushbutton Replacers

  Pushbutton replacers make the manufacturing process a streamlined experience by putting buttons for each command in a central location.

   

  Overseers

  The overseer is an HMI typically run on Windows programs. It’s more visual than the other HMIs and is useful for applications like MES or SCADA.

   

  Who uses HMIs?

  HMIs are commonly used in industrial settings, such as food, manufacturing, and energy. Because of their ability to gather data, consolidate information, and provide visuals, HMIs are beneficial for industrial companies that need a centralized system to interact with their machines.

   

  How do you pick an HMI?

  Because there are several types of HMIs, it’s important to know what you need for your industrial process.

   

  How large do you need the screen to be? This coincides directly with how much space you can allocate for the HMI, so take the time to measure your facility and research the different HMI sizes available.

  You’ll also want to consider the memory availability. Do you need to store large amounts of data? Or will your HMI suffice with a smaller memory drive? 

  Connectivity is another concern for HMIs. Usually, HMIs connect through an Ethernet port, but that may not be the best option for your company. You may need an HDMI or USB port, or something more particular for your machine. Double-check what connectivity you need to use for an optimal HMI purchase. Check out NS Automation for Siemens HMI Repair

  Other considerations while purchasing an HMI include the software it contains, the resolution you need, and its ability to act as a computer or as a separate screen. There are a variety of software applications you can put on an HMI, such as security, data-logging, language switching, and more. If you need more software programs, then you will want a more advanced HMI to handle them.