Siemens MindConnect Nano System Manual page 56

Configuring protocols
4.3 Overview of OPC UA protocol for MindConnect Nano
The browsing result of a datasource will expire after a day.
The OPCUA browsing operations are done sequentially on the device side not in parallel.
The child of unsupported nodes type will not be shown in browsing result.
The device will not execute the other configuration and commanding updates
made by the user via UI during browsing process.
If the OPCUA Server contains more than 150K browsable nodes under
"Root/Objects" folder, then the browsing operation will be cancelled by the
device. Some OPCUA servers contains duplication of nodes to support different
OPCUA specifications therefore, the unique number of nodes to browse is
limited to 150k.
The OPCUA browsing operations done sequentially on the device side are not in
parallel. It is recommended to trigger only one operation at a time from UI and
collect results before triggering a new browse operation.
For more information on suggested configuration values, refer to the following
section
Re-browsing needs to be triggered if the device is restarted in browsing process
and the device will cancel the previous browsing task when it expires after
90mins.
Multiple datasources cannot be browsed at the same time. If you try to browse
multiple operation, below error message occurs.
MindConnect Nano
System Manual 7/2023
Read performance MindConnect Elements.
56