Hello,

I would like to ask about network performance and differences of methods UaClient.readAttribute and UaClient.readValues.

My situation is following:
Application is located in a destination with a long distance from OPC server (ping between servers is around 150ms) and I do 10-20 synchronous reads of nodes like UA.readAttribute(nodeId, Attributes.Value). Every read takes around 200 – 300 ms, that’s from 2 to 6 seconds in total.

My question is when I use UaClient.readValues(nodeIds[], …), where nodeIds is an array of all these 10-20 nodes whether internally this is translated to one “big” read from OPC server or is it just a series of reads similar to sequence of single reads. Or is there another better way how to read bigger amount of nodes?

I tried to analyze network traffic, but I wasn’t able to see the difference.

Thank you,
Ladislav Asenbrener