PID control

[fanigani]

Hi 

     I want to on and off the gate voltage .when I am running the program the gate voltage is increasing from 0 to 5 volts but when I am stopping the program still the gate voltage is 5 volts its not coming to 0 volts I don't understand why is the same. can any one help me out with this.

[Freelance_LV]

Hi

I was not able to open the VI as it was in a higher version. If you can convert it to LV 2010 or lower, I can see if I can be of some help.

However, as a first aid, I can suggest using Reset Device VI after you clear your tasks, if you are using NI DAQmx vis.

[fanigani]

HI 

     I am doing on electronic load actually I am acquiring voltage and current in this .and i want to maintain constant current but I am not able to do so can u help me. and  what is worng with my code or any thing  to do in PID control .

[nathand]

One thing that will might help is to set the output range of the PID VI properly.  Why do you have values of -100 to +100 when your DAQ card can only output 0-5V?  Also, how did you determine your P and I gain values?  Have you gone through a tuning process?  The manual included with the LabVIEW PID toolkit (PDF in the LabVIEW manuals folder) may help here.