Can anyone generate the Torque signal

[krishna_ak]

Hi,

   Please find the attached document for Torque Signal.

  Basically I would like to generate a Signal (know as Torque) as shown in attached Document.

  I have to generate the signal(as shown in figure) and I have to send that signal to PCI-6723 channel from their to DAU.

 At present I am able to generate but the thing is in 250k samples I am able to generate .with this signal I am sending 19 DC voltage   signals,4 frequency signals and one Torque signal o PCI-6723 with 250k samples for each channel.

Some times DAQ generates DAQmx error.Error code = -200018. which tells me to decrease the output buffer or decrease the sample rate.

I am sending 250k samples*numof channels(23) data to 6723 which is too high with sampling rate of 250k.

Please give me the solution.if you have any quires please feel to ask.

Regards

krishna

[50ohmTerminator]

Hey Krishna,

There are a couple of things that you might want to look into. The specification sheet (once you open the .chm file, look under Device Specific Information -> NI 6722/6723 -> Specifications) says that the maximum update rate for 24 channels is 253 kS/s if you use the onboard memory (FIFO buffer) and 60 kS/s if you use your PC memory (RAM). I believe you have a total FIFO size of 2047 samples (you will have divide that by the number of channels you are using, I.e. 2047 Samples / 24 channels = 85 S/channel).

So if you want to use the onboard FIFO, then you will have to cut down the output waveform for each channel to 85 Samples or you will have to slow your update rate for each channel to 60 kS/s if you want to use your computer RAM. 

Wish you a Happy New Year.

Malay Duggar
NI

Message Edited by 50ohmTerminator on 12-28-2006 01:14 PM