You’ve heard this phrase before: “It’s simple. But nobody said it would be easy.”

And this is exactly one of those cases.

The Honeywell UDC3500 digital controller can support up to four setpoint programs, the ramp/soak profiles used in batch control operations. But after configuring all four profiles, I was stuck on how to select the one I wanted the controller to use.

There’s no “Program Select” button on the keypad. So I was mystified on how I was going to select my setpoint profile program #3.

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