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10/15/2020
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Hello everybody, I'm working with OPC UA specification 14. I'm quite new with OPC UA, so I have a basic question that I could not find an answer elsewhere. I found that the meaning of Publisher ID and Writer Group Id is quite similar. For example, we have a device with multiple sensors. This device plays as a publisher. So we need the id of the device (PublisherId) and the id of each sensor (DatasetWriterId). I cannot find the usage of WriterGroupId in this case. Please give me some explanation, so I can have some clear understanding about this. Thank you in advance.
05/30/2017
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The WriterGroup specifies communication properties, such as the SecurityGroup or TopicName, that are shared by many DataSetWriters.
02/24/2014
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Also, if you look at it from a pure protocol-side perspective, UA PubSub is quite flexible in what actually gets put "on the wire" and what not. And, in many configurations, the WriteGroupId will not be present on the wire.
In these cases, the concept of "writer groups" still exists and has the meaning described by Randy, but the values of WriteGroupIds themselves become more or less useless. And it looks like that this is the configuration you are dealing with.
Regards
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