The OPC UA server sends non-empty keep-alive publish responses with all monitored items under specific circumstances

The OPC UA server sends non-empty keep-alive publish responses with all monitored items under specific circumstances

Summary

When a subscription is created by an OPC UA client with publishing disabled and monitored items are added and after that publishing is enabled, the OPC UA server returns all monitored items in publish responses in keep alive messages although no values, timestamps or quality have changed.

Description

When a subscription is created by an OPC UA client with publishing disabled and monitored items are added and after that publishing is enabled, the OPC UA server returns all monitored items in publish responses in keep alive messages although no values, timestamps or quality have changed.

Solution

An issue has been addressed in the zenon OPC UA server in the process gateway where under specific circumstances the OPC UA server sent non-empty keep alive publish responses.  

Issue Number: 34408
Fixed on Date: 11.11.2016
Versions: 7.50 0 BUILD 33300 | 7.60 0 BUILD 36068