7 Operation at Use of a PC
7.3 Configuration of the Device
166 SICAM P850/P855, 7KG85xx, Device Manual
E50417-H1040-C482-A6, Edition 10.2018
7.3.6.3 OPC UA PubSub (MQTT)
Function Description
The OPC UA PubSub (MQTT) protocol is used to:
• Provide users a flexible and mobile access to the data of protection, power quality, and control devices
• Evaluate the data of protection, power quality, and control devices
The protocol is resolved in the following ways:
• Devices send data from different locations where data is built and stored to cloud services via Internet
connection.
• You retrieve the grid diagnostic data via Internet in local control centers or use mobile applications for
energy management, supervision, alert detection, and maintenance tasks.
This entire data flow of device interconnectivity (using standardized communication protocols), data access,
and data evaluation via Internet is also called IoT (Internet of Things). The basic cloud services are supplied
by a cloud service provider, for example, Siemens MindSphere.
Configuration via User Interface
After activating the protocol, you can see an additional menu entry Protocol OPC UA PubSub (MQTT) in the
navigation window of the Configure tab.
Figure 7-52 Activation of the OPC UA PubSub (MQTT) Protocol via the User Interface
NOTE
The protocol OPC UA PubSub (MQTT) is only available in the firmware of SICAM P855 V2.60.
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