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Usage.md

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Usage

Via the IE Flow Creator, we can write and read the OPC UA data.

The used flow can be downloaded here and imported into the IE Flow Creator, that is running on the same IED as the OPC UA Connector.

Read metadata

To print out the OPC UA Connector metadata, follow these steps:

  • create a mqtt in node
  • set the server to 'ie-databus' with port 1883 and corresponding user name/password ('edge'/'edge')
  • set the topic to ie/m/j/simatic/v1/opcuac1/dp
  • create a debug node and connect to the mqtt in node
  • deploy the flow and watch the debug window

metadata_flow

metadata

Now you can see the configured datapoints according to OPC UA Configurator settings.

Write data

To write some data on the OPC UA tags, you must fetch the tag ID from metadata payload based on the tag name. Please follow these steps:

  • for the intValueEdge2Plc tag, create an inject node to write the value 4444 with this JSON payload: {"seq":1,"vals":[{"id":"103","qc":3,"val":4444}]}
  • for the intValueEdge2Plc tag, create another inject node to write the value 9999 with this JSON payload: {"seq":1,"vals":[{"id":"103","qc":3,"val":8888}]}
  • check if the intValueEdge2Plc data point has the ID 103, change it to your value if not
  • create a mqtt out node
  • set the server to 'ie-databus' with port 1883 and corresponding user name/password ('edge'/'edge')
  • set the topic to ie/d/j/simatic/v1/opcuac1/dp/w/Profibus2Edge, change Profibus2Edge with your OPC UA connection name if you used another one
  • connect the inject nodes to the mqtt out node
  • deploy the flow
  • click the single inject buttons, to write the values

write_data_flow

Read data

To print out the transfered OPC UA Connector data, you must fetch the tag ID from metadata payload based on the tag name. Please follow these steps:

  • create a mqtt in node
  • set the server to 'ie-databus' with port 1883 and corresponding user name/password ('edge'/'edge')
  • set the topic to ie/d/j/simatic/v1/opcuac1/dp/r/#
  • create a debug node and connect to to the mqtt in node
  • deploy the flow
  • as soon as the value for a configured tag changes, you can see it in the debug window

read_data_flow

The incoming data looks like the following:

read_1

Use Data Service

The app Data Service collects the data out of different connectors and stores it for a defined time period. This is a prerequisite for other apps like Performance Insight.

To activate the data transfer from the OPC UA Connector, proceed as following:

  • open the IED web interface
  • open the app Data Service
  • go to tab 'Connectors' and select 'OPC UA Connector'
  • select the edit button and enter the user name and the password for the Databus user ('edge'/'edge')
  • activate the adapter and save

DataServiceAdapter

  • go to tab 'Assets & Connectivity' and add the variables, that were configured within the OPC UA Connector

DataServiceAdapter

  • data is now collected by the Data Service and can be used by further apps