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Gathering the device IDs of all installed PXI components
MichaelLong
Member
12-14-2007 08:05 AM
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Hey all,
at the moment I'm developing a test application in C# which makes use of the following hardware components:
3x PXI-2532 (512 Crosspoint-Matrix)
1x PXI-6259 (Multi I/O Daq)
2x PXI-4072 (DMM)
All cards are installed in an external chassis of the type PXI-1045.
To access the matrix cards and the I/O-Daq card (all DAQmx devices) I have to use the NationalInstruments class library. The DAQmx namespace supplies a method returning all installed DAQmx cards an their corresponding device IDs as configured in Measurement & Automation Explorer. This was the easy part.
Concerning the DMM cards I'm having problems gathering this device ID.
In contrast to the DAQmx device class, acquiring the DMM card in C# makes use of a wrapper class created by Measurement Studio's Instrument Driver Wizzard.
The constructor of this wrapper class wants a "logical name" as parameter to initialize the DMM e.g.:
niDMM dmm = new niDMM("PXI11::15::INSTR". false, false);
Unfortunately this does not work. It only works using the device ID like shown in MAX: niDMM dmm = new niDMM("Dev2". false, false);
My problem is, I've absolutely no clue how to get this device ID programmaticly. I tried to use the VisaNS namespace and its ResourceManager, this gave me all unique VISA resource names like PXI11::15::INSTR at last. But this does not help me so far.
Greets
Michael Long
at the moment I'm developing a test application in C# which makes use of the following hardware components:
3x PXI-2532 (512 Crosspoint-Matrix)
1x PXI-6259 (Multi I/O Daq)
2x PXI-4072 (DMM)
All cards are installed in an external chassis of the type PXI-1045.
To access the matrix cards and the I/O-Daq card (all DAQmx devices) I have to use the NationalInstruments class library. The DAQmx namespace supplies a method returning all installed DAQmx cards an their corresponding device IDs as configured in Measurement & Automation Explorer. This was the easy part.
Concerning the DMM cards I'm having problems gathering this device ID.
In contrast to the DAQmx device class, acquiring the DMM card in C# makes use of a wrapper class created by Measurement Studio's Instrument Driver Wizzard.
The constructor of this wrapper class wants a "logical name" as parameter to initialize the DMM e.g.:
niDMM dmm = new niDMM("PXI11::15::INSTR". false, false);
Unfortunately this does not work. It only works using the device ID like shown in MAX: niDMM dmm = new niDMM("Dev2". false, false);
My problem is, I've absolutely no clue how to get this device ID programmaticly. I tried to use the VisaNS namespace and its ResourceManager, this gave me all unique VISA resource names like PXI11::15::INSTR at last. But this does not help me so far.
Greets
Michael Long
Dippi
NI Employee (retired)
12-17-2007 08:31 AM
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Hi
Michael Long,
I'm sorry, but this is a little bit inconsistent.
You cannont access the device by calling the VISA resource name.
You have to use the device ID you found in the Measurement & Automation Explorer.
There is no other way.
best regrads
Dippi
I'm sorry, but this is a little bit inconsistent.
You cannont access the device by calling the VISA resource name.
You have to use the device ID you found in the Measurement & Automation Explorer.
There is no other way.
best regrads
Dippi
01-08-2008 03:12 AM - edited 01-08-2008 03:14 AM
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Hi Dippi,
thx for your answer. Mabye I was a bit unclear about how to get this device ID. I don't necessarily have to use the VISA-system. It was just a desperate attempt to get a proper resource name niDMM accepts.
Greets
Michael
Message Edited by MichaelLong on 01-08-2008 03:14 AM
thx for your answer. Mabye I was a bit unclear about how to get this device ID. I don't necessarily have to use the VISA-system. It was just a desperate attempt to get a proper resource name niDMM accepts.
Hence I appreciate _any_ way to get this device ID as shown in the Measurement & Automation Explorer programmatically in the .NET way.
You have to use the device ID you found in the Measurement & Automation Explorer.
Greets
Michael
Message Edited by MichaelLong on 01-08-2008 03:14 AM
