Hi Sarah,
Having checked all the connections with the system, parts etc and the fact that the system we already have set up seems to work in Labview, I think it is something that I am missing in VI Logger that I haven't changed. In reply to your questions see the highlighted bits.
OK point number 1 - Can you tell me the difference between the virtual channels and the physical channels and how they relate to the scanning process that I seem to see a lot on the discussion forums?
Early on in the post, you describe an issue where 1-4 of your transducers work when connected to the adaptor you have for the DAQ board but as soon as you plug any of the other 7 into the board you don't get a reading. This is correct. These 7 do not work at all, individually or combined but when plugged in alongside of the other 7 transducers, they stop the 4 working ones from providing any readings . I get an error message when I run a test on the individual transducers (the 10007 ones).
Is this the point where you get error 10007? Yes.
Do you change anything in your VI Logger task configuration when you plug a different transducer in? I change the individual channels through which the transducers are logged... each has its own i.e. ch0 - 1, ch1 - 2, ch3 - 3.
We could really do with more information on how you're configuring the VI Logger task. Have you created a Virtual Channel for all your transducers? When you say virtual channel what do you mean? Are the virtual channels relating to the actual physical channel... where it is plugged in i.e. channel 0, channel 1 etc? How can I change the virtual channel if this is not the case? Can you send me a screen print of where it is on the programme, please? Each transducer had its own name i.e t1, t2, t3, etc, own scale and each transducer has a different scale already set up on VI Logger. When we reloaded the VI Logger, I noticed that the transducer scales were all the same (I haven't changed them) as they were before we took VI Logger off the computer.
Do you always set the physical channel to be one of the 4 DAQ board channels that your transducer adaptor is connected to? Yes ie. ch0 - 1, ch1 - 2, ch3 - 3. We only have 4 available channels. I have noticed that the physical channels may refer to the same one as another. ie i plug in T1 to ch0, T2 to ch1 but the other remaining transducers are not plugged in but may refer to ch0 or ch1. will this create a problem?
In VI Logger, the scan list will be the order in which your virtual channels are listed in VI Logger. If the adaptor that connects your transducers to the DAQ board is connected to CH0-3, then you should try and put your virtual channels in that order. How do I change the virtual channel and what is the way to change it correctly when all the other channels may point to the same one (that is if ch0, ch1, ch2 etc are chosen). Does every single one need to have an individual channel? Can you send me a screen print of where it is on the programme, please?
Sorry to ask what are probably quite basic questions, but the manuals are difficult to decipher unless you have been using the system for a long time.
