problem with test panel

[eesen]

Hello,

I have a PCI 6143 card. I place it to my RT target. I tire to use test panel in MAX . When I tire to test analog input , a error appears "An exception occured within the external code library node.vi ESeriesAITest1.vi was stopped at node AX10 of subvi daqmxcfg_DQAmx Create Chennle(sub).vi. This migth be corruption on Labview memory. Save your work a new location and restart LabView"  Then test panel give no respond and ı have to close with task manager of my computer. I trie many times and give same error. I also trie with a different computer but result did not change. What can be the problem?

[Brian F.]

Hello eesen. 

Thank you for contacting National Instruments.

In order to start answering your question, I need some basic information about your setup.  First, are you using a desktop computer as a LabVIEW Real-Time for ETS Target or are you using Real-Time eXtensions (RTX)?  Also, what drivers are you using in conjunction with the PCI-6143 card?  What OS are you using on your target machine? 

Also, my understanding is that you are using an analog input test panel in MAX when the quoted error occurs.  Did this error also happen when you tried the second computer as well?  Or did it fail with a different error message? 

We look forward to helping you on this issue.  Have a great day!

Brian F
Applications Engineer
National Instruments 

[eesen]

thank you for your reply. I solve the problem. In MAX, for devices there is a part named accessories. In there ı mark one accesories, when ı mark it none, the error message is gone. I do not now the reason....

Now ı have another problem I used deskop PC for target. I have two card as ;PCI 6143 and PCI 6289. When ı give no signal to the anolog signal channel A0 and trie to read it, ı read 10 volt DC voltage. I shoul read only noise , where 10 volts DC comes from.

Another problem is that ı give square wave to my card (PCI 6143 and PCI 6289) but in test panel ı read a wave like sinusoid. For PCI 6243 ı give 3 volt peak to peak but ı read 6 volt peak to peak. What happenings?

Message Edited by eesen on 01-19-2007 03:05 AM

[Brian F.]

Hello eesen. 

Since you are connecting an AO channel to an AI channel, the last value output on the AO channel will show up on your AI channel.  If you wish to see a specific value on the AO channel, you should set this value in the test panels on MAX.  If you do this, do you see the correct value? 

When you give a square wave to the card, you report that you read a sinewave.  What frequency is the square wave and how fast are you reading the signal?  Also, where is this square wave being generated?

Finally, you state that you input a 3 volt peak to peak signal and read a 6 volt peak to peak signal on the AI channel.  Are you configuring the 3 volt peak to peak in the MAX test panels?  If so, you are configuring the amplitude and not the peak to peak value on the AO test panel.  So, if you configure an amplitude of 3 volts, it would make sense that you read 6 volts peak to peak. 

Please let me know the answers to the above questions and I will be happy to assist you further!

Brian F
Applications Engineer
National Instruments

[eesen]

Hi, I think there are some misunderstanding points:( I said AI0 (analog input zero) not AO.(Analog output)

With a functon generator i give square wave with 110 hz 3 volt peak to peak voltage to input channel of PCI 6143 and PCI 6289 card. I am sure that i give peak to peak voltage. Then in MAX, i am reading the signal with 1 khz. I  read 6 volt peak to peak signal and i read a signal like a sinusoid.

I read datasheet of the cards. Gain and cut of frequecy values can be configured. But i can not find an adjustment in MAX.

Best regards

[Brian F.]

Hello eesen. 

I have a few troubleshooting suggestions in order to isolate what exactly is happening here.  First, do you have an oscilloscope to verify that your function generator is actually outputting a 3 V peak to peak square wave?  Secondly, I would recommend reading in a DC voltage to see if you read the correct amplitude off of that signal.  If we see the same gain on a DC voltage that we are seeing on the AC voltage, it could signal that a gain setting is configured to a value other than unity.  Finally, I would recommend increasing the sampling rate from 1 kHz to see if this improves the reconstruction of your signal. 

Also, are you seeing the same behavior on both the 6143 and 6289 cards?  Your second post on this thread made it sound like the issue was only with the 6143.  Have you now tested the 6289 as well? 

Please post any updates and we will be happy to assist you further. 

Brian F
Applications Engineer
National Instruments