Is there a gateway page or tag that shows the number of OPC UA clients that are connected to the Ignition OPC UA Server?
The Status/OPC Connections page only shows the number of UA Servers that the Ignition OPC UA Client is connected to.
Not readily.
If you click "Server" under the Diagnostics column for a connection on the OPC Connections status page, you can then go to the Session Diagnostics tab, enable diagnostics on that Server, then count the Sessions:
Diagnostics are expensive and shouldn't be left enabled, though.
Is it possible that there is an OPC UA client connected that does not show up under the Sessions? I am using UAExpert as my opc client and Security Policy = None but I don’t see it appear under the Sessions. UAExpert is connected however and I am able to see tag values changing.
You sure you're connected to the server from the same Gateway you're looking at?
Yes, both running on the same VM. Endpoint URL is opc.tcp://localhost:21380
Works on mine 
This isn't the default port, you changed this in the Ignition server settings and restarted? and updated the Ignition OPC UA client connection?
Restarted the OPC UA module. It looks like the connection is there - the blank row in the screenshot.
The connection details also appear correctly, it’s just the row in the “Select Session” is blank. This connection uses Security Policy = None and Ignition does not have the UAExpert certificate so maybe that’s why it’s blank?
Either way, the main thing was to get the number of connections so this solution works. Thanks!
