no volatge analogue out actually

[eyad.alim]

Dear sir,

         I have SCXI-1100 & PCI-6221 & SCXI-1180

         I would like to get analogue voltage out (i have 2 channels available), when I do that no voltage out from the SCXI-1180, in spite of the analogue input is OK and the digital I/O OK, but the analogue out is not ok, i don't know why?

Thanks for your efforts.

eyad

automation engineer.

[RT4CY]

Hello eyad,

Thanks for posting on the NI Discussion Forums!  I understand you are  having trouble generating an analog output from the SCXI-1180 feedthrough panel.  May I ask how you are confirming this?  Are you checking the pins with an external voltmeter?  Could you verify that you are reading from the correct pins (see this KB)?  Have you had issues with this SCXI module in the past, or is this your first time using this system?

[eyad.alim]

Dear RT4CY,

         Thanks so much for your response.

Are you checking the pins with an external voltmeter?

yes, I checked the out voltage pins but no voltage out.

Could you verify that you are reading from the correct pins (see this KB)? 

the analogue out pins as follows:

 1180                 PCi-6221

20	DAC0OUT	22
21	DAC1OUT	21
23	AOGND	54, 55

Have you had issues with this SCXI module in the past, or is this your first time using this system?

No, it is my first time to use this system also it is only time to use labview (VER 8.5).

Also it will be kind of you if you send me any exmple that generate a continous variable voltage ( say 4Vdc ), because all I have found (sine wave - square wave - triangle wave) but I would like to out a constant voltage.

Thanks so much for you efforts.

eyad

automatio engineer.

[RT4CY]

Hi eyad,

I have a couple more questions for you, that I forgot in my first post.

-  How are you generating the voltage?  Are you using Measurement & Automation Explorer (MAX) or a programming environment such as LabVIEW or Visual Studio?  This will help me point you to an appropriate example.

-  If you have been testing the AO through some programming environment, let's take that out of the equation and use MAX. 

If you are not familiar with MAX, you can find it by going to Start»Programs»National Instruments.  Locate your device under Devices and Interfaces.  Right-click on the device and choose Test Panels.  In MAX, you can choose to generate either a DC voltage or a sine wave.  It would also be beneficial to test both AO channels.  I assume when you say "no voltage out", you mean 0 volts correct?