Real-time plot with changing acquisition rate

[sardarsree]

Hi,

  Sorry. i forgot to attach my project setup. I attached that setup pic here. 

[George_P_Burdell]

It appears you don’t have any VI under your cRIO controller.  You can’t just go directly from your FPGA to the development computer.  You need to go through the controller.  The FPGA talked to the controller, then the controller talks to the PC.  Therefore you will need to setup this communication as well.

I would suggest looking at the FPGA Tutorial linked below for additional help.

NI Developer Zone: FPGA Design, Development and Programming Tutorial
http://zone.ni.com/devzone/cda/tut/p/id/3358

[sardarsree]

Hi,

      Thank you so much. Please tell what modules i need to add in the fpga VI. For my application  I have  to take  the wave form signal from NI-9221.

[George_P_Burdell]

I would suggest looking at some of the shipping examples for an idea of how a cRIO project should be set up.  You can access them by going Help>>Find Examples from within the LabVIEW environment.  My suggestion for one to get started with is under Hardware Input and Output>>CompactRIO>>Basic IO>>Analog Input – cRIO.lvproj.  Take a look at this example and see where everything is.  From there you can translate this into your project.

[sardarsree]

sir,

Just tell me. Is it possible to take graph  for 120khz singnal (the signal is speed of wheel with 6000rpm)with NI-cRI 9221.

thank you

[George_P_Burdell]

Is your 120khz signal from an encoder?  Most encoders generate a digital PWM signal that can be read with a counter.  The NI 9221 is an analog input module that cannot read digital signals or give you access to the counters.  I believe you would have more success with a NI 9401 or NI 9402 which are our digital modules. 

NI 9221
http://sine.ni.com/nips/cds/view/p/lang/en/nid/14590

NI 9401
http://sine.ni.com/nips/cds/view/p/lang/en/nid/201849

NI 9402
http://sine.ni.com/nips/cds/view/p/lang/en/nid/204678