MATLAB: Problem with vxipnp driver

drivermddrodheschwarzvxipnpzvb

Hello

Recently, I connected to the ZVB8 instrument of Rodhe&Schwarz and I was able to execute some commands.

But, I don't know why, suddenly it stopped working a week ago. I tried a lot of things, and even I formatted my computer to start again, but it didn't worked. I'm using a code that works in other computers, but I can't understand why is not working for me.

First, I select the compiler using mex -setup

Then I can see that the driver is installed correctly instrhwinfo('vxipnp', 'rszvb')

Then I create the driver makemid('rszvb', 'zvb8driver')

To connect, I execute deviceObj = icdevice('zvb8driver.mdd', 'TCPIP::192.168.1.2::INSTR');

(or deviceObj = icdevice('zvb8driver.mdd', 'TCPIP::192.168.1.2'); or deviceObj = icdevice('zvb8driver.mdd', 'TCPIP::192.168.1.2:: devicename ::INSTR');)

connect(deviceObj)

And then I get the next error:

Error using icdevice/connect (line 113) The VXIplug&play driver could not connect to the instrument using the specified resource. If this error is not an instrument error, use MIDEDIT to inspect the driver.

This worked for me a week ago, but not now.

I have Matlab 2013b 64 bits, visa 5.3, visual studio professional 2010 (I think only exists the 32 bits version because it can compile to 64 bits architectures), the IVI shared components 2.2.1 64 bits and the rszvb drivers for 64 bits provided by rodhe&schwarz. These are theoretically the requirements according to Rodhe application note "How to use Rohde&Schwarz instruments in Matlab".

Do anyone knows what can be happening and the solution?

Thank you in advance.

Best Answer

After all, I discovered that I was working in a different drive (d:) than the one where the IVI, VISA, etc. were installed, and the problem disappears when I execute deviceObj = icdevice('zvb8driver.mdd', 'TCPIP::192.168.1.2::INSTR'); and connect(deviceObj); in c:

Related Solutions

MATLAB: Cannot connect to instrument using IVI driver

Since I do not have the actual instrument, I was not able to try it out with one - but I was able to successfully connect using simulation mode of the IVI driver. I used R2010b for the following:

>> iviInfo = instrhwinfo('ivi')
   iviInfo = 
                  LogicalNames: {}
                    ProgramIDs: {'AgilentRFPowerMeter.AgRFPM'}
                       Modules: {'AgRFPowerMeter'}
    ConfigurationServerVersion: '1.7.0.12115'
      MasterConfigurationStore: [1x59 char]
                   IVIRootPath: [1x36 char]

The command listed above will result in a structure where ProgramIDs field will list all the installed IVI-COM driver while the Modules field will list all the IVI-C driver installed on your computer.

As it is seen from the output, I had only installed one driver from the link posted and that driver installs both an IVI-C as well as an IVI-COM driver for the Agilent Power Meter.

To use these installed IVI-C and IVI-COM drivers in MATLAB, you will need to have/create a MATLAB Instrument Driver (which is a layer around those drivers). Depending on which driver (IVI-C or IVI-COM) you plan to use, you would call the makemid command (makemid = Make MATLAB Instrument Driver).

 >> makemid('AgRFPowerMeter','MATLAB_IVI_C_Driver.mdd');

The command above creates an MATLAB Instrument Driver for the IVI-C driver - AgRFPowerMeter (listed in the Modules field). The second argument is the name for the created MATLAB Instrument Driver.

Similarly if you plan to use the IVI-COM driver to communicate with your instrument you would create the MATLAB Instrument Driver using the ProgramID of the IVI-COM driver:

 >> makemid('AgilentRFPowerMeter.AgRFPM','MATLAB_IVI_COM_Driver.mdd');

Once you have the *.mdd file, you can create a device object using the syntax:

 >> deviceobj = icdevice(<name_of_my_mdd_file>,<instrument_visa_address>);

So, if you plan to use the IVI-C driver (note that if you are not using simulation mode, you can avoid the 'optionstring' and 'simulate=true' arguments):

 >> ivicobj = icdevice('MATLAB_IVI_C_Driver','GPIB0::5::INSTR','optionstring','simulate=true');
 >> connect(ivicobj);

While if you plan to use the IVI-COM driver:

 >> ivicomobj = icdevice('MATLAB_IVI_COM_Driver','TCPIP0::my-instrument-hostname::INSTR','optionstring','simulate=true');
 >> connect(ivicomobj);

Remember, if is important to get the instrument's VISA address correct for connect to pass in non-simulation mode. You can get the instrument's VISA address from the VISA Vendor's utility - for example NI's Measurement and Automation Explorer and/or Agilent's Connection Expert.

Hope this helps.

-Ankit

MATLAB: Do I receive an error when I invoke the SELFTEST function in a MATLAB Instrument Driver using the Instrument Control Toolbox 2.8 (R2009a)

The SELFTEST function associated with the device object is introduced as a place-holder function in auto-generated MATLAB Instrument Drivers. This function is for MathWorks testing purposes only and is not meant to replicate the behavior of, or replace, the SELFTEST function of the instrument.

The instrument specific SELFTEST function can usually be found in the UTILITY group of the device object. To invoke the correct SELFTEST function, execute the following code:

deviceObj = icdevice('AgilentRfSigGen.mdd','visaAlias')
connect(deviceObj)
utilObj = get(deviceObj,'Utility') %Assuming that SELFTEST is part of UTILITY
SelfTest(utilObj)

Best Answer

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MATLAB: Cannot connect to instrument using IVI driver

MATLAB: Do I receive an error when I invoke the SELFTEST function in a MATLAB Instrument Driver using the Instrument Control Toolbox 2.8 (R2009a)

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