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  5. QuickOPC-Classic in .NET
  7. Browsing, Browse Dialogs and Controls
  9. BrowseNodes() on alias comes up empty

BrowseNodes() on alias comes up empty

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09 Jun 2015 11:26 #3192 by support
Replied by support on topic BrowseNodes() on alias comes up empty
Yes, - I was about to reply that if Kepware does not make such info is not available through OPC, then we cannot do anything about it from our end. Thanks cdunlap for advise on this.

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09 Jun 2015 06:08 #3191 by hjohansson
Replied by hjohansson on topic BrowseNodes() on alias comes up empty
Ok, I see what you mean. I guess they are not nodes as such, I'm just using them as if they were. The alias is pointing to a node kind of like a folder shortcut.

Thanks for your input, I guess I'll have to find some other way for my application to find those leaves.

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08 Jun 2015 20:43 #3190 by cdunlap
Replied by cdunlap on topic BrowseNodes() on alias comes up empty
Hi,

Just to add some input to this:

The Alias that is configured in Kepware is meant for use with Suitelink clients and won't be visible through OPC. It is just there for Wonderware's software to be able to access the tags via their Suitelink protocol.

For a more detailed explanation of why, you can see www.kepware.com/Support_Center/doc_FastDDESuiteLink.asp [alias discussion begins about halfway through].


Thanks.

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08 Jun 2015 16:41 #3189 by support
Replied by support on topic BrowseNodes() on alias comes up empty
We do not differentiate between the aliases and other nodes (because OPC has no "knowledge" of aliases as something special). Therefore this looks like a server issue.

What leads you to believe that the server does provide sub-nodes under alias nodes? Do you see them in some other OPC client?

Thank you

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08 Jun 2015 11:39 #3188 by hjohansson
BrowseNodes() on alias comes up empty was created by hjohansson
Hi,

I have a Kepware KEPServerEx V5 with an Alias mapped to a node.
When I call EasyDAClient.BrowseNodes() specifying the node it returns a list of all sub-nodes and leaves, but when I call the same method specifying the alias name the returned collection is empty.

Is there any way to get nodes and leaves under a node by specifying its alias name?

Kind regards,
Henrik Johansson

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  1. Forum
  3. Discussions
  5. QuickOPC-Classic in .NET
  7. Browsing, Browse Dialogs and Controls
  9. BrowseNodes() on alias comes up empty
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