LabVIEW
Keysight 34461A initialize.vi not working
Solved!
Hello I have a problem using my Keysight 34461A. When I run my program multimeter says it's on remote mode but the program itself freezes on a intialize.vi block. I'm using labview 2018 and have correct drivers.
Is there any solution?
@NIquist wrote:
First thing to try is setting ID Query option to FALSE. You may have to modify your Initialize VI if the string your instrument returns isn't handled correctly.
EDIT: Of course, you should also verify your VISA resource is set correctly and physical connections are good with NI-MAX.
Just an FYI that when you disable the ID query for HP/Agilent/Keysight, it will default to a very basic set of commands that may not even work for your instrument. It depends on getting the ID to send the commands appropriate to your instrument.
That explains that "User Data" variable sent to the instrument I was wondering about. The Initialize VI reads the model of the instrument and enumerates it into an integer. Looks like in this case it just sets it to the simplest model in the line (the 34460A = 0) if you don't run the ID query. Interesting. Thanks for the info Bilko!
One small correction: It does NOT send that User Data to the instrument. A VISA session provides a storage attribute that allows the user (here the instrument driver) to store some arbitrary information that it can later query, in order to do device specific handling. On the VISA API level this is a pointer sized integer but LabVIEW has no pointers (and the closest thing to pointers, a DVR, didn’t exist for almost another 20 years, when VISA was invented and integrated in LabVIEW).
You can think of this like a private element in a LabVIEW class and the property node is the class property accessor. All VISA property nodes don’t directly correspond to a device element but rather to an attribute of the underlaying communication interface or a VISA internal session management attribute.
@AdrianOstrycharczyk wrote:
Hello I have a problem using my Keysight 34461A. When I run my program multimeter says it's on remote mode but the program itself freezes on a intialize.vi block. I'm using labview 2018 and have correct drivers.
Is there any solution?
Everything said by others hear is good information HOWEVER, it fails to address one potential issue.
That DMM has a triggering subsystem. If the device is actively working on measuring almost nothing is important to the device. In fact, it will simply store most commands for later action until it is finished with its primary purpose of taking measurements. The "*RST" command will abort any active measurement.
I would suppose that you are not taking any action to abort an ongoing measurement. So, the instrument is simply too busy trying to do the important work you left it trying to finish. Like a dog you placed on a stay command, your trivial distractions don't mean anything to the well trained device.
It freezes on attempting to reset and always ends on a timeout no matter how long the timeout is. I also tried using another Keysight instrument 53220a. The result was exactly the same. I'm running out of options. Is there any possibility that there's problem with my USB port?
