Work on the WirelessHART specification began over seven years ago. Since that time the WirelessHART specification has been published by the HART Communications Foundation. Also, in 2010 WirelessHART was approved by IEC as an international standard, IEC 62591Ed. 1.0. From the very beginning, the WirelessHART design included the features required for both monitoring and control applications. When WirelessHART field devices are used in closed loop control, the PID must be modified to utilize the slow periodic or non-periodic exception reporting of measurement values. The PID in DeltaV v11 (released last year), includes the PIDPlus option that may be selected when using a WirelessHART transmitter in closed loop control.
Information on the PIDPlus feature and the performance that it enables when using wireless transmitters for control are addressed in the following:
- PID Advances in Industrial Control, IFAC Conference on Advances in PID Control PID’12, Brescia, Italy, 28-30 March 2012
- DeltaV v11 PID Enhancements for Wireless, DeltaV Whitepaper, August, 2010
- WirelessHART Successfully Handles Control, Chemical Processing, January, 2011
- Wireless – Overcoming Challenges of PID Control& Analyzer Applications, InTech, July/August, 2010
- PIDPlus An Enhanced PID Control Algorithm for Wireless Automation, AS-74.3199 Wireless Automation, Aalto University, Finland
- Incorporating Wireless Devices into Single-Use Disposable Bioreactor Design, 2009 Dhirubhai Ambani Life Sciences Symposium
- Improving PID Control with Unreliable Communications, ISA EXPO Technical Conference, 2006.
- Similarity-based Traffic Reduction to Increase Battery Life in a Wireless Process Control Network, ISA EXPO2005, Houston, TX
Ove the next month, this blog series on Control Using Wireless Devices will explore the PIDPlus technology and the control performance that it enables using WirelessHART devices.
