Has anybody used DSC or the OPC server to access DNP 3.0 devices

I have a potential client that has some devices that communicate using DNP 3.0. I see that DNP is supported in OPC server 5.1. I have zero experience using DSC and OPC, but I want to send this client a small demo app so he can see LabVIEW working with his equipment.
If anybody has done this, could you please give me some pointers on where to start, or better yet, some example code.
This will be on WinXP, LabVIEW 7, OPC 5.1 and if needed, DSC 7.
Thanks
Ed
Ed Dickens - Certified LabVIEW Architect - DISTek Integration, Inc. - NI Certified Alliance Partner
Using the Abort button to stop your VI is like using a tree to stop your car. It works, but there may be consequences.

Thanks Robert,
We already have DSC 7, so if it�s easier and/or quicker, I�ll probably end up using that. I guess what I need to do run through the Introduction to DSC so I at least know the basics of it.
One question, do I need to have the customer�s equipment to configure the DNP connection so I can test communication with the Server Explorer? Or do I just need to know the format of the Tags to configure so he can test it.
Thanks Again
Ed
Ed Dickens - Certified LabVIEW Architect - DISTek Integration, Inc. - NI Certified Alliance Partner
Using the Abort button to stop your VI is like using a tree to stop your car. It works, but there may be consequences.

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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.

Has anybody used the microsoft JDBC 2.0 driver for sql server 2000?

Hi,
Has anybody used the JDBC 2.0 driver for sql server 2000 downloadable from the
microsoft website?When I try using it with WL 6.1 sp1 it says it can't load the
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Hello Thomas,
You may want to download the driver again and install it again.
heres a sample xml tag in the config.xml:
<JDBCConnectionPool
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Targets="myserver"
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ensure that you follow the instructions from Microsoft. For using 2000
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hth
sree
"Thomas" <[email protected]> wrote in message
news:3c91ec0e$[email protected]..
Hi,
Has anybody used the JDBC 2.0 driver for sql server 2000 downloadable from
the
microsoft website?When I try using it with WL 6.1 sp1 it says it can't load
the
driver.I try viewing the class file from the jar file using the jar utility
it
gives an unknown Zip format error.Anybody has any solution for this ?If
anybody
has managed to work with this microsoft driver i will be grateful if they
provide
me with a solution.
Thanks
Thomas

Has anybody used SOA server on Web Logic

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Thanks Robert,
We already have DSC 7, so if it�s easier and/or quicker, I�ll probably end up using that. I guess what I need to do run through the Introduction to DSC so I at least know the basics of it.
One question, do I need to have the customer�s equipment to configure the DNP connection so I can test communication with the Server Explorer? Or do I just need to know the format of the Tags to configure so he can test it.
Thanks Again
Ed
Ed Dickens - Certified LabVIEW Architect - DISTek Integration, Inc. - NI Certified Alliance Partner
Using the Abort button to stop your VI is like using a tree to stop your car. It works, but there may be consequences.

Unable to access only Read Write addresses of AB Micrologix 1400 PLC using NI DSC and NI OPC server

Hi,
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Thanks in advance.

The OPC Server cannot force Outputs so if th registers in question are the outputs of ladder rungs you cannot write to them via the server. The controller will accept the write from the server but will not execute the write. In some cases the server event log will post an error if it is the PLC. Do you get errors when you try to write and if so what are the posted error messages.
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http://www.kepware.com

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Invalid data has been used to update the list item. The field you are trying to update may be read only.

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Code Snippet
<ExtendedStatusColumnValues>
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<StatusColumnValue>Branch2</StatusColumnValue>
</ExtendedStatusColumnValues>
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Code Snippet
state = Convert.ToInt32(SPWorkflowStatus.Max);
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Code Snippet
state = Convert.ToInt32(SPWorkflowStatus.Max) + 1;
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Code Snippet
((SetState)sender).State
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hope this answered your question
Best Regards

Invalid data has been used to update the list item. The field you are trying to update may be read only (Lookup Field).

Hi.
I am getting below error while adding value to look-up field.
Invalid data has been used to update the list item. The field you are trying to update may be read only.
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CAML to create lookup field (It works Fine)
string lkproductNumber = "<Field Type='Lookup' DisplayName='Product Number' StaticName='ProductNumber' ReadOnly='FALSE' List='" + pNewMaster.Id + "' ShowField='Product_x0020_Number' />";
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Microsoft.SharePoint.Client.ServerException was caught
Message=Invalid data has been used to update the list item. The field you are trying to update may be read only.
Source=Microsoft.SharePoint.Client.Runtime
ServerErrorCode=-2147352571
ServerErrorTypeName=Microsoft.SharePoint.SPException
ServerStackTrace=""
StackTrace:
at Microsoft.SharePoint.Client.ClientRequest.ProcessResponseStream(Stream responseStream)
at Microsoft.SharePoint.Client.ClientRequest.ProcessResponse()
at WebServiceProviders.ClientServices.NewProductInventory() in Z:\.............ClientServices.cs:line 889
InnerException:
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Thanks
Mehar

Try some thing like below,
your data value that needs to be update should be in this format "ID of the lookup";#"Title of the Lookup"
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listItem["Product_x0020_Number"]
= "1;#iPhone";
listItem["Product_x0020_Number"]
= "2;#Mobile";
Hope this helped you....

Has anybody used DSC or the OPC server to access DNP 3.0 devices

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