Were it not for noise and disturbances, a feedback controller could fairly easily maintain output of the controlled process (process variable) close to its desired value (setpoint). However, forces other than the controller's efforts can often change the process variable. An example is sun shining in on a room cooled by an automatic air conditioner.
To help developers build devices with embedded networking and Internet connectivity, Lantronix Inc. (Irvine, Calif.) unveiled April 9 what it reports is the first fully integrated semiconductor with the hardware components needed to enable those capabilities. The Device Server Technology Network Interface (DSTni) chip is scheduled to be available in fall 2001.
Control Engineering editors— in the 14th annual process—highlighted the best products of the year, based on technological advancement, impact on the market, and service to industry.Editors selected from among thousands of products mentioned in Control Engineering and Control Engineering Online during year 2000, in nine product categories: Control components; Human-machine interface...