We have a Allen Bradley Compact Logix PLC connected via the built in OPC-UA driver and at least twice a day the connection is dropped and it does not reconnect. Selecting “Edit” under the Device Status page on the gateway, making no changes and clicking “Save Changes” is the only way I have found to get it to reconnect.
On the same gateway we have Siemens S7-400 devices connected a we do not have this issue.
We are on version: 7.6.1 (b2278) | 32-bit
Allen-Bradley driver suite for the OPC-UA module Version: 1.6.2 (b504)
This seemed to start after upgrading to 7.6.1. After the upgrade to 7.6.1 I tried updating the AB driver to the version above and that did not fix it.