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Tuning and Control Loop Performance, Fourth Edition, 4th Edition by Gregory K. McMillan

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APPENDIX E

ENHANCED PID FOR WIRELESS AND ANALYZER APPLICATIONS

INTRODUCTION AND OVERVIEW

It is widely recognized that wireless measurements considerably reduce installation and maintenance costs. However, it is less recognized that the portability of wireless offers the ability to optimize the measurement location for the fastest most representative process response and to demonstrate/prototype process control improvement for finding and justifying permanent solutions.

The wireless update time termed default update rate (refresh time) is the time interval for periodic reporting. The wireless update sensitivity termed trigger level is the minimum change in measurement value for exception reporting. To save power, the transmitter goes to sleep ...

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