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Northbound Interfaces
Your portal to the cloud or supervising systems.
Northbound Interface Overview
The Northbound Interface in WinCC OA provides a unified interface for multiple northbound communication protocols.
Basic Configuration
Configure with Plantmodel
Configure a Plantmodel as the data source for the Sparkplug B EoN Node.

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Northbound Interfaces
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- MQTT Publisher
  The MQTT publisher provides a northbound data interface for MQTT clients to data point values within the WinCC OA project.
- Node-RED
  Node-RED is a flow-based programming tool that allows the creation of applications in a graphic environment.
- OPC UA Server
  The WinCC OA OPC UA Server provides an OPC UA interface to access WinCC OA datapoint values, alarms and historical data.
- OPC Server
  The OPC Server enables the communication with OPC clients.
- OPC HDA Server
  The WinCC OA OPC Historical Data Access (HDA) Server is used for the exchanging of archived process data of the WinCC OA project.
- OPC Alarms & Events
  OPC Alarms & Events (brief OPC A&E) is in addition to the Data Access another standard in order to implement a central alert management manufacturer spanning. OPC A&E is used to guarantee the coupling with other control systems as well as to display alerts and events in a hierarchical system
- Modbus/TCP Server
  The Modbus/TCP server provides the possibility for Modbus/TCP clients to query data from a WinCC OA system and arrange the data within a Modbus data model.
- SNMP
  SNMP (Simple Network Management Protocol) is a protocol for monitoring network devices (servers, workstations, routers, switches and hubs etc.) and their functions. It allows you to administer your network.
- OLE DB Provider
  OLE DB is a Microsoft specification for accessing data on different computers. It is based on Microsoft's COM technology and is the successor to the older and limited ODBC technology.
- Insights Hub Connector
  The Insights Hub connector allows you to upload data from WinCC OA to Siemens Industrial Cloud Insights Hub and to process data. WinCC OA supports the integration of SCADA data from WinCC OA to Insights Hub.
- Northbound Interface Overview
  The Northbound Interface in WinCC OA provides a unified interface for multiple northbound communication protocols.
  - Northbound Manager Interface Overview
    This topic provides an overview of the Northbound Manager interface, describing its main sections and configuration options for both DP Group and Plantmodel data sources.
  - Basic Configuration
    - Configure with DP Group
      Configure a DP Group as the data source for the Sparkplug B EoN Node.
    - Configure with Plantmodel
      Configure a Plantmodel as the data source for the Sparkplug B EoN Node.
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Configure with Plantmodel

Configure a Plantmodel as the data source for the Sparkplug B EoN Node.

It is assumed, that you already modelled your plant within the Plantmodel Editor.

Inside the Northbound Manager interface, create a new connection with the connection name, that has been added to the JavaScript Manager, see Basic Configuration.
Select Plantmodel as the data source in the Northbound Manager.
Click the entry point selector and choose the desired view as the entry point.
Set the Group ID and Node ID as required.
Configure access rights for the nodes and datapoints as needed.
Click Apply to save the configuration.

The configured nodes are now available for the broker communication.

The metric names for the examples above are "ProductionLine:FanSpeed", "ProductionLine/FanSpeed", and "ProductionLine/Temperature". If the option Incl. system name in metric name is enabled, an additional prefix with the system name, such as "System1/", is added.