Questions about value of monitored item displays in OPC UA Client. |OPC UA Standard|Forum|OPC Foundation

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Questions about value of monitored item displays in OPC UA Client.
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Annie Wu
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08/09/2018 - 21:13
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Hi,

I have two questions about how the value of monitored item displays in OPC UA Client.

1. When OPC UA Client set sampling interval of a monitored item  slower then update interval of the value in underlying system,  would there some value not display in OPC UA Client?

2. When the publish interval of a subscription is not arrived, but OPC UA Client send a read request of a node which is the monitored item of the subscription. How to display the value?

Thanks. 

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Randy Armstrong
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08/13/2018 - 21:25
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1) Yes. 

2) Not sure what you want to do. Why read if you have subscribed?

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Annie Wu
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08/14/2018 - 20:30
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I’m not sure if there is a scenario that user want to know the current value from underlying system between publish interval.

I just think maybe send a read request can fit this situation. 

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