Field experience using WirelessHART in control applications may be summarized in the following manner:
- WirelessHART measurements may be used in closed loop control applications. Window communications mode minimizes power consumption
- PIDPlus is a standard feature of DeltaV and works with standard WirelessHART devices. Standard DeltaV Tools support Simulation and Tuning.
- The performance of PIDPlus in a wireless control network is comparable to PID with wired inputs. PIDPlus handles lost communications better than conventional PID.
- PIDPlus tuning depends only upon process dynamics, not on wireless update rate
For best control performance process disturbances, the guideline provided for update period should be observed. If disturbance response is not critical then a slower update period may be used.
If you are interested in learning more about control using wireless devices, then a number of references are listed in the blog that I posted on February 20th, 2012. Hope you found this series on control using wireless devices to be of help in evaluating and applyng this technology.