harika

QUOTE (dblk22vball @ Feb 12 2009, 10:09 PM)

check out the advanced serial example that ships with labview. it has how to write and read in it.

Hi,

Thanks for helping.but thats not my problem.

whenever i run my GUI,and pressing run button,i have to feedback from motor through controller to my serial port dynamically.can u give me any more help.

Thanking you,

Harika pothu.

Hi,

i'm using serial communication for my gui.i,m able to transmit data from pc to controller but how can we get acknowledgment from controller to pc.please help me.

Thanking you,

harika.

Hi,

i'm developing one GUI for motion controller.I'm using serial communication as sub vi,so that i can send packet format for each control.but ,after running main vi and selecting any control,the corresponding data is transmitted and it is strucked.I want vi without opening front panel of serial communication and data has to be transmitted for each n every control.It is for pc to pc communication.

The vi is attached hare.

Thanking you,

Harika pothu.

hi,

how can we convert an vi to exe file.please help me out.

Thanking you,

Harika.

hi,

i am working with nmclib dll.using this,i'm opening one port and after that serial communication takes place then closing port.but when i'm opening port it shows an error.so.can any one help out please.

Thanking you,

Harika pothu

hi

i tried as u suggested,but i didn't get the plot.i attached my plot.so,whenever the phase diff is less than -90 deg the plot should be continued and other than that plot should be stopped.plz help me out.

thanks.

harika.

hi

i am trying to compare the varying phase against a constant value and whenever the varying phase is greater or equal to that constant,the plot should be stopped.if it is less than that constant plot should be continues.the plot is freq along x-axis and phase is along y-axis.i am using comparison function in case structure but i don't know how to plot whenever phase is less than the value.i am getting white tunnels at the out side.

thanks.

Harika.

hi

thanks for ur response.

HARIKA

QUOTE (asbo @ Nov 24 2008, 09:33 PM)

Well, your biggest problem is that you don't have any data retention. Waveform graphs allow you to specify both X and Y coordinates, but you have to give it the entire data set at once, otherwise you're simply graphing an instantaneous point. Create two shift registers on your while loop, one for frequency points and one for phase points. Use the Build Array function to concatenate each new point onto the shift register array, and then bundle the two shift register arrays and pass the resultant cluster to the waveform graph.

Be careful, though; the array will get very large so you can't run it for too long without consuming gobs of memory. You can use the iteration block, a case structure, and Delete From Array to solve this problem.

Hi,

I tried as per your instructions the file is attached but i didnt get the output. Please help me out.

With Best Regards,

Harika,

Cyber Motion Tehch.

Hyderabad.

Hi I am new to labview,

I want to plot point by point xy graph, but i am not getting it which I attached. so please help me how to plot frequency vs phase graph.

thanks

harika....

Hi Harika,

Could you be more specific in your question? For example, do you want to know how to have a second axis displayed or is your question about how to calculate the phase variance?

If you think a screenshot of your code or a VI would help us understand better your problem, please post it as well.

hi sir,thank you for ur response.i am very new to labview.i am generating two sinusoidal signals with same amplitude but different frequencies i.e.,i am keeping first signal freq as constant(40 hz) and varying second signal freq manually upto 40hz. i am intended to plot the continuous xy graph for freq difference on x-axis and phase difference on y-axis,whenever i will get phase difference of -90 deg the continuous graph should be stopped.

i need to know how to generate automatical variation of signal frequency.actually i am not getting xy graph continuously for every change of frequency.it is showing one value as a point at that instatent.i am also not getting stopped graph for phase diff of -90deg. :question:

normally the graph showing the variation for only for particular value.i want the graph for phase difference for two signals for all values at a time by varying the frequency(0-40HZ) difference.