I have an ‘Off’ Scan class for preserving tags but not polling them. However, I’ve noticed that on gateway restart or OPC-UA module restart, the gateway will log the following message:
After this, that scan class will appear in the OPC-UA connections list with a polling rate of 100ms. In order to stop this, I have to go open the project that the scan class is associated with, adjust the polling rate to 1000ms, and then back to 0. After doing this, the scan class will return to ‘Closed’ and no longer poll, as intended.
A screen of the scan class’s settings:
Is there a better way to have a “No-Polling” scan class?
Is there a work around for this?