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06/04/2018
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I have 1000 tag
every 1 sec I want to read 1000 tag
foreach (var eachTag in Tag)
{
DataValue read = session.ReadValue(eachTag.NodeId);
}
1000 tag Time elapsed: 00:00:15.1166664
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02/24/2014
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Why would you want to read 1000 tags, why not use subscriptions? OPC UA is designed to have a very efficient system for getting the latest value of a variable. Reads are used to get static information from a system, or to get a single value (i.e. not something that is updated periodically).
In any case if you are reading - why issue a 1000 single point reads vs one read for 1000 points? you have created a lot of round trips to the server.
So the last question would be what server are you communicating with? what is the network speed? a small embedded device will perform very differently from a large server.
Paul Hunkar - DSInteroperability
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