Read array tags with OPC (not DS) -- LV6.1

Hello DSC experts:
The Siemens OPC server to which I am connected publishes array tags and I cannot change that fact. I can read those array tags using the "Datasocket Read Double Vector.vi" but as the number of tags grows this slow method becomes unreliable. Instead I would like to use DSC but I do not see any Vi that allows me to read vector tags? Like I said I have to live with the OPC configuration as it is today hence I do not think that going through the flatten/unflatten to string method is an alternative.
Any clue?
Thanks a lot,
Chris

Can you do any kind of array indexing when addressing the tag inside the opc server?? Something like tagname.xx or tagname[xx] where you would select a portion of the tagname array data. Could you talk directly with the VISA drivers and use a read multiple registers command instead of a DSC driver?? To my knowledge, the tag engine does not support array addressing for a tag datatype. I do use the method of flattening an array of data into a binary string and writing it to a memory tag, but the array data is created inside labview. I submitted DSC tag array datatype to a request list quite some time ago but never heard anything about it again. I wonder if a DDE connection could be established to read string data. Then do a string to number conversion. What version
of Siemens hardware/software are you using?? I think the tag engine really is lacking with respect to the capabilites of the latest OPC software. I would love to see NI directly integrate an OPC program like KEPWARE so you did not have to use the tag engine. Are you using serial or ethernet communication??

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You're right. That is a bit misleading. Anyway, I
decided to not cast (String) to it. It was a simple
fix just like I figured, but of course I figure it
out after I made the post.
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<main Name='EMPRESA' Link='home.swf' >
<sub Name='HISTORIA' Link='content.swf' toLoad='content/contentrosa.xml'/>
<sub Name='OBJECTIVO' Link='content.swf' toLoad='content/contentrosa2.xml'/>
</main></nav>
</content>
-------------------------------|end banner.php |---------------------------------------------
this other does not work:
-------------------------------| banner.php |---------------------------------------------
<?php
echo"<?xml version="1.0"?>
<content>
<settings>
<menu X='160'/>
</settings>
<nav>
<main Name='HOME' Link='home.swf'/>
<main Name='EMPRESA' Link='home.swf' >
<sub Name='HISTORIA' Link='content.swf' toLoad='content/contentrosa.xml'/>
<sub Name='OBJECTIVO' Link='content.swf' toLoad='content/contentrosa2.xml'/>
</main></nav>
</content>";
?>
-------------------------------|end banner.php |---------------------------------------------
Why? What is wrong? why does my flash does not understand the tag php
Message was edited by: armandix

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and in which way can LabVIEW help when "Wonderware is not able to read OPC data (Shared Variables) from LabVIEW in the form of arrays of double" as you wrote?
That sounds like a problem of Wonderware - and you should ask the support for Wonderware…
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