Reducing controller updates in a control loop
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United States of America
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Dec 14, 2021
Grant Date -
Jul 9, 2015
app pub date -
Mar 19, 2015
filing date -
Mar 19, 2015
priority date (Note) -
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Abstract
A control technique controls a process in a manner that reduces the number of controller changes provided to a controlled device, and so reduces the power consumption of the controlled device along with the loading of a process control communications network disposed between the controller and the controlled device. This technique is very useful in a control system having wirelessly connected field devices, such as sensors and valves which, in many cases, operate off of battery power. Moreover, the control technique is useful in implementing a control system in which control signals are subject to intermittent, non-synchronized or significantly delayed communications and/or in a control system that receives intermittent, non-synchronized or significantly delayed process variable measurements to be used as feedback signals in the performance of closed-loop control.
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