Life in the HMI marketplace is getting much more complicated these days, now that the requirements being put on HMIs are increasing.
ARC notes that HMIs are taking on attributes of traditional SCADA applications and running more sophisticated analysis functions, just as we described in "Jump Start IT" [CONTROL--March '03, p29]. Today's HMI hardware and software may perform IT functions, such as maintaining an asset management data base or process historian, or it may use its XML and Web Services capabilities to make the bridge between plant floor systems and IT software running elsewhere.
While it does that, HMI products are also expected to monitor a process and put up operator screens, trends, and alarms. Let's not forget that HMIs still must talk to human operators and keep them informed about the process.
Although HMI hardware and software is approaching commodity status because of the COTS platform, the capabilities expected from that commodity are getting extremely complex. The first HMI vendor who can offer a reasonably priced product that does everything we have come to expect may run away with the market.
Don't be the least bit surprised if Microsoft acquires an HMI/SCADA vendor, produces a line of .NET/Web Services operator interfaces, and makes HMIs a true commodity (you heard it here first). It seems like the market is right for somebody to do just that.
Meanwhile, the products that follow in our roundup illustrate a selection of the latest HMIs you can still buy from industrial hardware and software vendors.
Embedded Computer Has Touchscreen
The QVGA Controller is programmable in C, has a touchscreen-controlled graphical user interface, and comes with a high-contrast 320x240 pixel electroluminescent or LCD graphics display. It has eight 12-bit analog input channels, eight 8-bit analog inputs, eight 8-bit D/A lines, 24 digital I/O, four high-current drivers, and two RS232/485 ports. A built-in GUI software toolkit provides an easy way to design a graphical interface to monitor, control, and display system status, bar graphs, or text messages.
Mosaic Industries
510/790-1255 www.mosaic-industries.com
PDA Software
Onset Computer
800/564-4377 www.onsetcomp.com
Web-Enabled PLC OI
Advantech
513/742-8895 www.advantech.com
PDA HMI Software
National Instruments
800/258-7022 www.ni.com
Programming Is the Object
QSI
801/466-8770 www.qsicorp.com.
Text Panel
Red Lion Controls
717/767-6511 www.redlion-controls.com.
Touchscreen OIs
Xycom Automation
734/429-4971 www.xycom.com.
MES Software
tasks, and a real-time database. HMI functions include graphics, trending, reports, alarms, events, and historical data logging and browsing. It supports SQL Server 2000, Oracle, Sybase, and ODBC and runs on PCs under Windows 2000 and Windows XP.
USDATA
972/ 680-9700 www.usdata.com
Data Logger Software
OPC Data Logger software lets users log process data gathered from OPC servers directly to SQL Server 2000, MSDE, or Access databases and to text files without any additional or intervening software. It includes point-and-click configuration, flexible file setup and rollover options, and the ability to start/stop logging based on time of day or process tag triggers. The software connects to any OPC Data Access 1.0 or 2.0 Server. Licenses start at $495.
Software Toolbox
www.softwaretoolbox.com
Fiberglass Enclosures
Hoffman
800/355-3560 www.hoffmanonline.com