Without using DAQ how a PID controller for temperature control Faster and my loop timeĪny suggestions? I tried the Autotune PID vi, but he could never solve the system. Old time loop was ~ 0.3 seconds, now it is 0.15 seconds. This seems to help some, but does not eliminate the oscillation. I tried to improve it by putting the measure of PV in a parallel loop. The sequence of events is-> order SP-> (wait)-> PV read-> PID use to set the new SP-> (loop) It seems that my sample rate is too slow (the PV and SP are made with GPIB). With IP control, Kp = 0.2, Ki = 0.00001, I get a constant oscillation around the setpoint.Īn example with PI control is attached. With a control P, Kp = 0.2, I get a damped oscillation, which hovers at about 2-4% higher than the set value. I'm controlling the radiator with a continuous feed, so the nominal value is an environment of tension and I left PID +/-100% 0 voltage swing at full scale. The radiator is small enough ~ 10 watts, so the response time is very fast. I'm working on a project of PID control with a dreaded heating control.
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