Prob. with HP 34401A for RS-232 communication
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From: marc france on 11 Jan 2006 11:10 Hello everyone, I am using Labview 7.1 and my O.S is Windows XP. I am trying to use the Hp 34401A multimeter with Labview. I have used the " HP 34401A single read example " from NI web site and the HP34401A app. available in Labview 7.1. It works fine through GPIB communication. However, when I scroll down the Visa Resource Name and choose " Com1" which I have cheked out to be the right one, it doesn't work. Both ends of the serial cord are correctly connected. I get this message : "VISA Write dans HP34401A Control Mode.vi->HP34401A Initialize.vi->HP34401A Single Read Example.vi" with the error number : -1073807339 I have download and installed <a href="http://digital.ni.com/softlib.nsf/websearch/CC5A993FEFA83D498625704600677AE7?opendocument&node=132070_US" target="_blank">NI-VISA Version 3.3.1 for Windows 2000/NT/XP--Includes support for LabVIEW RT and RTX</a> and <a href="http://digital.ni.com/softlib.nsf/websearch/E1E4025A3F7B4E7A8625709F005BAB77?opendocument&node=132070_US" target="_blank">VISA Run-time Engine Version 3.4.1 for Windows 2000/XP x64/XP</a> But this doesn't change anything to the problem. I have seen on the forum that other people have had a similar problem but I haven't been able to find the correct solution. Would anybody have an idea what else I could try? Or have a very, very, simple VI that I could try out to see if I succeed in communicating with the Hp instrument through RS-232. Any help would be great, Thanks a lot, Regards, Marc
From: marc france on 11 Jan 2006 17:11 Hi, Thank you very much to both of you for your help. Before I try to communicate through MAX ( or Labview), do I need to install any software related to Hp 34401A so that it is recognized ? regards, Marc
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