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Pressure impulse control using LV 8.0

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

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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,

Dustin D

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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

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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,
Dustin D

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