Connect third part opc client to labview

I have no experience with Labview. I need to connect a third part opc client to get data from Labview 8.5. When I run the OPC Explorer and connect to the local server I see the data items. However if I run the free OPC explorer from matrikon it does not find any OPC servers. I see Variable Engine running in services. Lookout 6.0 is set at manual and is not running (I don't know if I need this). This computer is located in another country on the other side of the world and I only have RDP access. What am I missing?
Many Thanks

Hello,
Are you using the DSC module? With the DSC module you can add a 3rd party OPC client and bind your variables through that.
Here is a screen shot.
National Instruments
FlexRIO & R-Series Product Support Engineer

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Naderus,
While I dont know all of the caveats that may come with a few of the acronyms in there, in general, you absolutely can use datasockets via an OPC server. Probably the easiest to use are network shared variables (which are an OPC server). I did notice you had another thread going here. Did you have any luck with the examples and help files they forwarded you to there?
Regards,
Kyle Mozdzyn
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Regards,
Kyle M.
Applications Engineering
National Instruments

How to make SVE a visible OPC server to third party OPC clients?

I've read SVE works as an OPC sever, but when I try to browse it with a third-party OPC client I get no items.
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http://zone.ni.com/reference/en-XX/help/371361E-01/lvconcepts/opc_conn_from_tpclients/

Hi Keptat
DCOM shouldn’t be the problem because you are not using the OPC server from an external computer or from other PC user, nevertheless, you can always try to do it.
I’m attaching some links with information about the DCOM privileges and how to configure de SVE.
Are you able to see others OPC servers with your clients?
http://zone.ni.com/devzone/cda/tut/p/id/3371
http://zone.ni.com/devzone/cda/tut/p/id/4679#toc3
http://digital.ni.com/public.nsf/allkb/5C8A90CD57B279F286256C2C006F1EB4?OpenDocument
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NI México
Mensaje editado por Coamín

Connection with OPC client

Hi,
I would like to access to my shared variables using an OPC client. (a free software called powerOPC or any other one)
When I use it locally, everything goes well, I can access my shared variables, but when I try to access from a distantr PC, I cannot connect and get some errors. I've tried to open port 135 on the firewall, I've read the following post: http://forums.ni.com/t5/LabVIEW/opc-dcom-access-denied/m-p/822246/highlight/true#M373884
But I still can't access my variables.
The NI Distributed System Manager can access to the distant shared variables, so I don't know what's wrong with other clients.
Does anyone knows how to do?
Both PC are running win 7, one is 32 the other 64bit.
LV2011
Regards

Hi toto26,
thank you for using National Instruments discussion forum.
Could you detail the way you use to communicate with your OPC server thanks share variable? Are you using datasocket like in this document or are you using DSC ?
Could you tell us more about the errors you get? Have you already seen this KB document and its first related link?
Thank you in advance
Regards,
Audrey_P
National Instruments France
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Journées techniques : des fondamentaux aux dernières technologies pour la mesure et le contrôle/comm...

LabView OPC client versus Opto22 Ethernet brain SNAP B3000

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NI has a good troubleshooting utiltiy to view OPC servers as an OPC client. Contact NI directly and we can get you this troubleshooting utility.
http://www.ni.com/support/
or 512-795-8248 ask for Industrial Automation.

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I heared that would be possible with the newest edition.

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Leo
[email protected]

Hi,
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LabVIEW 64bit OPC client

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2012 had no problem. 2013 gave error 1181 (Protocol not recognized by LabVIEW).

Has the OPC client component been ported to Windows 64 bit? I kind of doubt it since NI Lookout is also still 32 bit only software and the LabVIEW DSC Toolkit hasn't been ported to 64 bit either so far.
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

LabVIEW DSC 2011 / OPC Client IO Server / Can I write to the OPC Server using OPC Groups?

Hi
I am using LabVIEW DSC module as a OPC client. My Shared Variables are binded to automation system OPC Server via "OPC Client IO Server".
On the OPC Server side it seems that the every write commands comes like one item at time, not like grouped.
Now I have tested this with the NI OPC Server as server and KepServer and LabVIEW DSC IO Server as OPC Clients.
When I use the NI OPC Server : OPC Diagnostics there are different events messages when the update request comes from KepServer or LabVIEW DSC.
There are log files on attachements for both write events.
Attachments:
Data from the KepServer.txt ‏6 KB
Data from the LabVIEW DSC OPC Client.txt ‏18 KB

Hello Pentsi,
I have received confirmation (from the PSE in the US) that DSC doesn't support group writes
There however work-arounds that might provide a solution:
- The first solution I had in mind was like this. Update the 50 OPC items as fast as possible.
Then use a 51st item as synchronization OPC item to check/indicate if new data has arrived/has been set/is available.
So LabVIEW sets 50 OPC values as fast as possible. The 51st value becomes goes from false to true when the first 50 values are written.
When this (51st) value is true on the OPC server you can read out the first 50 values (from the non-LabVIEW side). When you've read out these values, then you can set the 51st value back to false (from the non-LabVIEW side).
In the meanwhile at the LabVIEW side you wait until the 51st value goes back from true to false.
When it becomes false, then you write again those 50 values and afterwards set the 51st synchronization value from false to true.
And this keeps on going...
Note: Keep in mind that you only have to monitor one event at the side of the Automation System OPC Server in this case (the 51st) and based on an event occuring over there you can just do a group read of the 50 others. Also keep in mind that the maximum rate (6500 updates per second) from inside LabVIEW with the DSC Module OPC client I/O server was also mentioned in this document (http://digital.ni.com/public.nsf/allkb/63C043359F1E12538625726E005BCD0C?OpenDocument).
Could this be a possible solution for your problem?
If you're using one of the OPC servers in this list (http://zone.ni.com/devzone/cda/tut/p/id/6417#toc19), then you can also use NI OPC Servers to update tags instead, which supports a faster update rate.
Kind Regards,
Thierry C - Applications Engineering Specialist Northern European Region - National Instruments
CLD, CTA
If someone helped you, let them know. Mark as solved and/or give a kudo.

LabVIEW DSC 2011 / OPC Client IO Server / Write by OPC Group...

Hi
I am using LabVIEW DSC module as a OPC client. My Shared Variables are binded to automation system OPC Server via "OPC Client IO Server".
On the OPC Server side it seems that the every write commands comes like one item at time, not like grouped.
Now I have tested this with the NI OPC Server as server and KepServer and LabVIEW DSC IO Server as OPC Clients.
When I use the NI OPC Server : OPC Diagnostics there are different events messages when the update request comes from KepServer or LabVIEW DSC.
There are log files on attachements for both write events.
Attachments:
Data from the KepServer.txt ‏6 KB
Data from the LabVIEW DSC OPC Client.txt ‏18 KB

Hello Pentsi,
I have received confirmation (from the PSE in the US) that DSC doesn't support group writes
There however work-arounds that might provide a solution:
- The first solution I had in mind was like this. Update the 50 OPC items as fast as possible.
Then use a 51st item as synchronization OPC item to check/indicate if new data has arrived/has been set/is available.
So LabVIEW sets 50 OPC values as fast as possible. The 51st value becomes goes from false to true when the first 50 values are written.
When this (51st) value is true on the OPC server you can read out the first 50 values (from the non-LabVIEW side). When you've read out these values, then you can set the 51st value back to false (from the non-LabVIEW side).
In the meanwhile at the LabVIEW side you wait until the 51st value goes back from true to false.
When it becomes false, then you write again those 50 values and afterwards set the 51st synchronization value from false to true.
And this keeps on going...
Note: Keep in mind that you only have to monitor one event at the side of the Automation System OPC Server in this case (the 51st) and based on an event occuring over there you can just do a group read of the 50 others. Also keep in mind that the maximum rate (6500 updates per second) from inside LabVIEW with the DSC Module OPC client I/O server was also mentioned in this document (http://digital.ni.com/public.nsf/allkb/63C043359F1E12538625726E005BCD0C?OpenDocument).
Could this be a possible solution for your problem?
If you're using one of the OPC servers in this list (http://zone.ni.com/devzone/cda/tut/p/id/6417#toc19), then you can also use NI OPC Servers to update tags instead, which supports a faster update rate.
Kind Regards,
Thierry C - Applications Engineering Specialist Northern European Region - National Instruments
CLD, CTA
If someone helped you, let them know. Mark as solved and/or give a kudo.

Add new item to OPC server in LabView

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Hi there,
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http://www.ni.com/white-paper/6417/en
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http://www.ni.com/white-paper/7450/en
Regards,
Norbert

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Our lab was shut down for the holidays period, so I couldn't try anything for a while. Back on it now though.
Thanks for your suggestions! However, I still can't reach the server. Some more details in this post.
The server explorer doesn't see the device either. I think both the
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When I enter the IP address of the machine at the new IO server window,
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Anyone?

How to develop dll towards VB and Delphi for vi's of a third-part usb device

Hello, dear lv'ers:
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Jun Lu
Member of Technical Staff in State Key Laboratory of Magnetism
Beijing National Laboratory for Condensed Matter Physics
Institute of Physics, Chinese Academy of Sciences
100190 Beijing, P.R. China
http://www.instrument.com.cn/ilog/handsomeland/

Probably, i have just got a solution for this problem.
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I am completely new to LabWindows/CVI. I will be starting soon with the tutorial, "Getting Started with LabWindows/CVI". However, our application needs to communicate with an RSLinx OPC Server. Any documentaiton on how to learn to do this would be very much appreciated.

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Alternative OPC Client?

Hello,
I’m searching for an alternative OPC-Client.
Is there someone out there who has developed a LabVIEW Interface for an OPC-Client (OPC-DA) from Softing, OPC Labs or another company? I did not found an OPC Client witch supports LabVIEW.
Maybe you would sell your code or spend your code or give Information or help for the implementation?
If you do not want to make your answer public you could send me a private message. Maybe I could return the favor with some code you would be interested in?
I know that LabVIEW supports OPC with 2 different Clients (http://www.ni.com/white-paper/7451/en/).
OPC via DataSocket
OPC via LabVIEW Datalogging and Supervisory Control (DSC) Toolkit
But the free OPC via Datasocket has limitations, and it does not work with the OPC-Server from IFM where other OPC-Clients work well (I think, the IFM OPC-Server Version 2 is not that well implemented).
And the DSC Toolkit is too expensive because we need only the OPC-Client component and we are using it at some customers (a Runtime Licence is 800 €).
Please help
Sletrab

I haven't worked too much with OPC, and I haven't tried this myself, but you could try looking for .NET or C implementations of an OPC client and call that.
Try to take over the world!

Connect third part opc client to labview

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