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  5. QuickOPC-UA in .NET
  7. Live Binding, Live Mapping
  9. Data Type changed by client?

Data Type changed by client?

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12 Apr 2017 16:53 #5108 by support
Replied by support on topic Data Type changed by client?
Yes, this is done by QuickOPC, for interoperability with all kinds of .NET tools. Not all of them support UInt16 and other such types. See

- opclabs.doc-that.com/files/onlinedocs/QuickOpc/Latest/User%2...ata%20Types%20in%20OPC-UA.html .
- msdn.microsoft.com/library/12a7a7h3.aspx#Types

Declare your property as Int32 or wider, and you will be all set.

Best regards
The following user(s) said Thank You: Captain_Dash

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12 Apr 2017 15:30 #5107 by Captain_Dash
Data Type changed by client? was created by Captain_Dash
Hello,

we run in an issue where we mapped a structure on the opc ua server to a similiar structure on the client site in c#. The data type on the server is UINT - 16 bit, 0 to 65535. At the c# side the Property which is mapped is an ushort - 16 bit 0 to 65535. The UpdateFailure event occurs and returns the following message:

Cannot set the target value to the object member 'UInt16 Statusword' of target type 'Orbotech.Spirit.HWComponents.PlcAxes.PlcMapping.AxisControl'. The inner exception contains details about the problem.


Inner Exception:

Object of type 'System.Int32' cannot be converted to type 'System.UInt16'.


We have no idea where the Int32 comes from. Is there something happening in the client?
I checked the type with a standalone client from another company and they say its Uint16.

Best Regards
André

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  1. Forum
  3. Discussions
  5. QuickOPC-UA in .NET
  7. Live Binding, Live Mapping
  9. Data Type changed by client?
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