PID control using DAQ card 6211 USB.

[kunj.acharya@utoronto.ca]

I have a VI in which I am Doing PID control for temperature control by manuplating the power (as denoted by PID output). While at the sametime I am controlling the reflected power by controlling frequency. ANd I am using DAQ card USB6211. I have written program in labview 2009 but am unable to solve some prroblems. I would appericiate the help here.

Thank you.

[Matt_McLaughlin]

Hi Kung,

I believe we actually discussed this issue over the phone earlier today. Due to the fact that the the DAQ Assistants are acquiring from and outputting to simulated channels, the VI you have set up will not actually perform closed loop control. The PID Theory Explained document goes over some general ideas of PID control as well as how to perform this in LabVIEW.

If you do want completely simulate your system before implementation of your PID VI, you may want to look into Using the LabVIEW PID Control Toolkit with the LabVIEW Control Design and Simulation Module. However, this may be overly complex as your application calls for a relatively simple implementation of PID control.

I hope that information is helpful!