why are there no advantech drivers for labview by ni ?

[pc_kol]

the advantech drivers do not integrate well in labview. The VIs provided by advantech are not direct equivalents and neither do they have the same features. I need some help on this.

[Ben]

Please share what kind of help you are looking for.

We may be able to help,

Ben

[JRA]

NI usually creates the instrument drivers when there appears to be enough demand for them. I would suggest contacting NI and suggesting they consider building such a driver.

[pc_kol]

Dear Ben

Thanks for your mail. I am using a PCL 818HG card on a Advantech IPC with PIII processor.

I need to scan 6 Analaog channels at a speed of 10 kilosamples/sec each for a duration of approx 360 seconds. I am using Multi channel DMA based transfer in cyclic mode and dumping it onto the hard disk. My main problem is I am facing is that from the second cycle onwards there is a break in the actual data shown on the screen for about 15 millisec. The data after this period is perfect.

When I used Multi Channel Interrupt based transfer, I did not have this problem. But there was a different problem. We started getting the same waveform in different colours on the waveform graph display. We assume that this meant that some data loss was taking place an
d channels were getting mixed up during the interleaving process when the 1D data was being split into 2D.

In both cases we have used the count value as an exact multiple of the number of channels.

Can you help us out to solve this problem. We dont mind losing a couple of samples during sampling once in a while in Interrupt based transfer. However, if channel data is mixed we are in serious trouble.

Regards

PC

[lp19]

Hi PC

I am using an Advantech PCI-1713 card and I was just wandering how your program is going because I am having difficulty with mine and was wandering if you would like to help each other out.

I am trying to measure 16 channels using one of there sample VI, I think it must be the same as your Multi Channel Interrupt VI you described in your message.

I have a question, how do you get it to save more than one cycle because mine is only saving one cycle and I do not know how to fix it.

For example if I enter COUNT = 100 then it will only save 100 samples. How did you get your VI to continue saving samples???? I also am using Cyclic.

I am new to DAQ and would like any help if possible

I have attached the Vi and an example o
f what I am getting.

Cheers mate

lp19