Speed

[manijndl]

i am connecting to a OPC DA Schneider Server with UA wrapper over it . i am using eclipse milo to connect but the response time to get tag values by function client.read() is very slow . please suggest something

[kevinherron]

Sorry, you’ll have to look closer at either the wrapper or the server. The client is not responsible for slow response times from the server.

[manijndl]

thanks kevin can i use use eclipse milo as a client for OPC DA so that i donot need for the UA wrapper?

[kevinherron]

No, Milo is only OPC UA. I think there is a project called Utgard that has OPC classic support in Java but I’m not involved with it in any way.

[manijndl]

one more question how can i get the changing tag values should i have to poll again and again to read the values or is there any better method to do that?

[ctron]

@kevinherron is correct, there is a project called Utgard which can do OPC DA and OPC XML DA directly from pure Java. I am the original author of this library:

• https://search.maven.org/#artifactdetails%7Corg.openscada.utgard%7Corg.openscada.opc.dcom%7C1.5.0%7Cjar
• https://search.maven.org/#artifactdetails%7Corg.openscada.utgard%7Corg.openscada.opc.xmlda%7C1.5.0%7Cjar

[manijndl]

@ctron i have trying from 2 days with Utgard but i am unable to connect with the OPC DA Server.

[ctron]

Then I would suggest to raise an issue: https://github.com/ibh-systems/org.openscada/issues

[manijndl]

@ctron raised please check