What is the key PID feature for Basic and Advanced Control?

The value of a key PID feature is increasingly becoming apparent. I got a preview of the importance when I found the 1980s vintage DCS required a fix for override control that was inherently addressed in the next generation of DCS by this feature. This wakeup call was followed by the realization this feature offered improved analyzer, blend, cascade, decoupling, feedforward, surge, valve position, and wireless control with a side benefit of simplified deadtime compensation.

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