Brett wrote:Hi Ian, when the pid is turned on (Manual -> Automatic) the current value of the Output is remembered as the baseline value. moving forward all output corrections are based off this value. so in your trend, you started pid with an output of 50. when the input crosses setpoint the proportional term is indeed 0, as you expected, it's just being added to this starting value.
this is standard pid behavior, and it exist to allow for a "bumpless transfer" from manual to automatic.
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