Technically, an operator interface (OI) and a human-machine interface (HMI) could be considered the same thing, and the differences between them are becoming increasingly blurred. The generally accepted definition of an OI is a usually a text-based display that may have a limited number of buttons to allow operator input to the control device. Some alpha-numeric displays have a number of programmable function keys and a full keyboard, but these are becoming rare because of the continuously falling prices of graphical touchscreen interfaces. An HMI is a usually a graphic-based display that provides a greater number of operator input options. One often-cited way to…Full Story
Beckhoff's automation specialist Daymon Thompson leads a webinar on the impact of IIoT and Industrie 4.0.