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© Softing Industrial Automation GmbH
dataFEED Gateway - User Manual
4.3.2 MQTT Topic Selection
A PLC project typically contains many PLC items. Generally, only a small subset of these items are relevant for
publishing via the MQTT protocol.
Due to performance reasons, only activate those items which are important to you.
The
MQTT Topic Selection
view allows to select the PLC items which are published to the MQTT Broker. For
performing this selection the available PLC address space is displayed in a hierarchical order.
Only scalar items are available for publishing.
Activation and deactivation of items
Activate or deactivate an individual item for publishing by selecting or deselecting the corresponding
checkbox of the item.
By selecting or deselecting the checkbox of a parent node in the hierarchical tree view, all child nodes are
activated or deactivated together with the parent node.
Saving and applying settings
1.
Click the
Save
button to save your settings.
A hint will appear reminding you that the application of some other settings is pending:
2.
Click at this link. Your settings will be applied.
Depending on the number of modified settings this process may take some time before being completed.
3.
A message in the upper window part will inform you about the successful modification(s).
