Comments on: LabVIEW Shared Variable Engine http://chrismeyer.org/wordpress/2008/10/labview-shared-variable-engine/ Sat, 28 Aug 2010 17:24:26 +0000 hourly 1 http://wordpress.org/?v=3.0 By: ektor http://chrismeyer.org/wordpress/2008/10/labview-shared-variable-engine/comment-page-1/#comment-1845 ektor Sat, 21 Nov 2009 01:18:55 +0000 http://chrismeyer.org/wordpress/?p=28#comment-1845 hey, well i was reading at this great post wich helped me very much and as i read more about the SVE i found that it uses UDP instead of TCP/IP, the thing is that NI has an enhanced propietary UDP protocol, wich implements time stamping and confirmation of received packet without sacrificing speed. I found it on "LabVIEW advanced programming techniques", second edition. Sorry for my poor english hey, well i was reading at this great post wich helped me very much and as i read more about the SVE i found that it uses UDP instead of TCP/IP, the thing is that NI has an enhanced propietary UDP protocol, wich implements time stamping and confirmation of received packet without sacrificing speed. I found it on “LabVIEW advanced programming techniques”, second edition. Sorry for my poor english

]]> By: Waterppk http://chrismeyer.org/wordpress/2008/10/labview-shared-variable-engine/comment-page-1/#comment-1109 Waterppk Mon, 14 Sep 2009 13:48:37 +0000 http://chrismeyer.org/wordpress/?p=28#comment-1109 You should check out <a href="http://lavag.org/" rel="nofollow">Lava Developers Forum</a> and post both of your VI's and a good description of the problem. It's hard to tell what would cause the data to stop being transmitted/received. Have you been able to get this example (or another) working? That would rule out physical networking problems. If an example works then it's something in your specific VI's that you'll have to figure out. You can also use <a href="http://www.wireshark.org/" rel="nofollow">Wire Shark</a> to monitor your network traffic on the networking side to make sure the data is getting from one computer to another, but don't start by using this program, there are easier (outlined above) ways to test this problem. You should check out Lava Developers Forum and post both of your VI’s and a good description of the problem. It’s hard to tell what would cause the data to stop being transmitted/received. Have you been able to get this example (or another) working? That would rule out physical networking problems. If an example works then it’s something in your specific VI’s that you’ll have to figure out. You can also use Wire Shark to monitor your network traffic on the networking side to make sure the data is getting from one computer to another, but don’t start by using this program, there are easier (outlined above) ways to test this problem.

]]> By: Bong Chua http://chrismeyer.org/wordpress/2008/10/labview-shared-variable-engine/comment-page-1/#comment-1104 Bong Chua Mon, 14 Sep 2009 06:07:30 +0000 http://chrismeyer.org/wordpress/?p=28#comment-1104 I am also using shared variable (network) but i suddenly experienced a zero value from the shared variable. And up to this time i cant find the solution to regain the actual data. What do you think is the problem? Thanks a lot. I am also using shared variable (network) but i suddenly experienced a zero value from the shared variable. And up to this time i cant find the solution to regain the actual data. What do you think is the problem?
Thanks a lot.

]]> By: Waterppk http://chrismeyer.org/wordpress/2008/10/labview-shared-variable-engine/comment-page-1/#comment-547 Waterppk Tue, 12 May 2009 19:12:01 +0000 http://chrismeyer.org/wordpress/?p=28#comment-547 Absolutely correct, I think I was on cruise control when I wrote that. LabVIEW uses TCP to confirm packet receipt, see above link in the text. Absolutely correct, I think I was on cruise control when I wrote that. LabVIEW uses TCP to confirm packet receipt, see above link in the text.

]]> By: Mark http://chrismeyer.org/wordpress/2008/10/labview-shared-variable-engine/comment-page-1/#comment-318 Mark Wed, 11 Feb 2009 19:14:13 +0000 http://chrismeyer.org/wordpress/?p=28#comment-318 Pretty good explanation, but as I've been digging into the LV shared variable it seems that as of LV 8.5 it's built on the TCP/IP stack rather than UDP see http://zone.ni.com/devzone/cda/tut/p/id/4679 for details Pretty good explanation, but as I’ve been digging into the LV shared variable it seems that as of LV 8.5 it’s built on the TCP/IP stack rather than UDP

see http://zone.ni.com/devzone/cda/tut/p/id/4679 for details

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