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OpcDa items

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Sacha
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02 May 2021 14:22 #9639 by Sacha

Replied by Sacha on topic OpcDa items

Prog ID "OPCLabs.Kit.Server.2" is a copy error. :whistle:

If the problem is only with special datatype, this error is not important for me.
Thanks!
Sacha

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support
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02 May 2021 12:06 #9638 by support

Replied by support on topic OpcDa items

I highly doubt that this is the actual source code you are using, because "OPCLabs.Kit.Server.2" is not a ProgId of our server. Correct ProgID is "OPCLabs.KitServer.2". With the incorrect ProgID, the error you would get is "Invalid class string". Consequently, I cannot trust that the remainder of the problem report is correct either; it appears to be at least partially made up.

In addition, Simulation.Constant_RECORD item uses VT_RECORD datatype. Tis is an extremely rarely used data type that almost no tools are able to consume, including .NET interop. "Datatype is not compatible." is perfectly OK error message with this item. Nothing wrong there.

Regards

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Sacha
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02 May 2021 10:48 #9637 by Sacha

Replied by Sacha on topic OpcDa items

When I read the values some of them give me an error .

Reading without error:

RequestList(0) = New OpcLabs.EasyOpc.DataAccess.OperationModel.DAReadItemArguments
RequestList(0).ServerDescriptor.ServerClass = "OPCLabs.Kit.Server.2"
RequestList(0).ServerDescriptor.ServerClass =  "Simulation.Register_DATE"
ReturnedList = EasyDAClient1.ReadMultipleItems(RequestList)

ReturnedList (0).ItemDescriptor.ItemId --> Simulation.Register_DATE
ReturnedList (0).ServerDescriptor.Path --> OPCLabs.Kit.Server.2

Reading with error:

RequestList(0) = New OpcLabs.EasyOpc.DataAccess.OperationModel.DAReadItemArguments
RequestList(0).ServerDescriptor.ServerClass = "OPCLabs.Kit.Server.2"
RequestList(0).ServerDescriptor.ServerClass =  "Simulation.Constant_RECORD"
ReturnedList = EasyDAClient1.ReadMultipleItems(RequestList)

ReturnedList (0).ItemDescriptor.ItemId --> Simulation.Constant_RECORD
ReturnedList (0).ServerDescriptor.Path --> opcda:OPCLabs.Kit.Server.2
ReturnedList (0).ErrorID = 0x80020005
The error description is : Datatype is not compatible.

The external OPCServers I connected did not give me problems but if I have a similar problem in the future what can I do?

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support
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02 May 2021 06:25 #9636 by support

Replied by support on topic OpcDa items

The problem description is insufficient.

Rules for forums posts can be found here: www.opclabs.com/forum/announcements12/2365-rules-for-forum-posts

Regards

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