03-18-2010 12:08 PM
I am a new user trying to set up a pressure impulse system using LV 8.0. I have a NI PCI 6251 and SC2345 connected to a proportional directional valve on a hydraulic system. I would like to define and control an impulse curve with LV. I have been able to produce a "dumb" impulse curve by creating a voltage curve and sending it directly to the valve. I would like more control using feedback from a pressure transducer and the solenoid position sensor on the prop. dir. valve.
I haven't had any success getting the example PID VI's to work. Is there another way to go about this or should I keep trying with the examples? I know there was a PID Toolkit v6.0 that will work with LV8.0, is this available anymore? Any other suggestions for this?
Thank you,
Stu
03-22-2010 10:08 AM
Hi Stu,
I'd reccomend checking out the example from the NI Example Finder found in Help»Find Examples then select Hardware Input and Output»DAQmx»Control»General»PID Control-Signal Source.vi. It sounds like this may be what you are looking for. Good Luck!
Regards,
03-22-2010 11:11 AM
Hi Dustin,
This example only includes proportional gain, is anything available with the integral and derivative gains? Would this be available with the PID toolkit for this version of Labview?
When I try running this example I run into Error-89130, asking me to reset the device. I have reset and reinstalled the PCI card successfully and still get this error. In other VI's I can send and receive data through the same channels with no problem. Any other ideas for troubleshooting this?
Thank you,
Stu
03-23-2010 05:03 PM
Stu,
ThePID toolkit would include all of these functions. You can download the evaluation copy here.
As for your error, have you tried using a different PCI slot in you PC? Also, do you know which VI the error is coming from?
Regards,