A METHOD IN A WIRELESS PROCESS CONTROL SYSTEM FOR REDUCING POWER CONSUMPTION AND A CONTROLLER AND COMPUTER PROGRAM PRODUCTS

摘要

12in12in12in12in12inThe invention relates to a method 20 in a wireless process control system 1 for reducing power consumption of a sensor node S S ... S ... S of the wireless process control system 1. The wireless process control system 1 further comprises a controller 2 in wireless communication with the sensor node S S ... S ... S wherein the sensor node is in a sleep mode. The method 20 comprises the steps of : predicting 21 based on an error signal when sensor measurement data is needed from the sensor node S S ... S ... S and determining an instant of time for communication between the controller 2 and the sensor node S S ... S ... S based thereon; and the sensor node S S ... S ... S re entering the sleep mode. The invention also relates to computer program products and a controller.