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paddy-dee

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  1. Dear Gabriel Thank you so much for this quick and perfect reply !!! Kind regards Patrick
  2. Hello forumHave there a question about the PID controller. I use two PID controllers (auto tune) in master slave mode (cascade) to heat and cool. I switch with the BIT "action; 0 = Reverse (Heating), 1 = Direct (Cooling)" to heat or cool.My problem is the controller output:The controller is cool, the setpoint is not quite reached yet and the contoller output has eg a value of 20%. Now the actual value falls below the setpoint. So I switch the PID controller to "heat up". Now the controller output still has 20% at the output. When switching from cooling to heating, the controller output is not reset, also not recalculated for heating.Is there a way to reset the controller? So that he recalculates the controller output?I'm doing an ugly detour right now! I change the proportional band to 0.1% for one second and then back to the effective value. The controller output is calculated "new" again.Works, but I do not like it that way.
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