Discrepancy in DNP3 Timestamps between the OPC Quick Client and Designer Tag Browser

Ignition
1

Hello,

We are monitoring OPC tags using the OPC quick client and also using the Designer tag browser. The tag originates from an outstation device using DNP3 and we use the DNP3 driver to connect it to the OPC UA server. When the outstation DNP3 point updates quickly (less than a second), the OPC tag in quick client also updates but the OPC tag in the Designer tag browser does not. Is there any difference between these two tags? Is there any reason why one might update and not the other?

Thanks in advance,

Andrei

2

The Quick Client doesn't display Ignition tags. It directly displays OPC items, raw.

Ignition tags, including OPC tags, filter out subscription updates where the value doesn't actually change, discarding new timestamps.

The Ignition designer's tag browser doesn't subscribe to tags, either--it polls them.