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Frequently asked questions

Why can't I see configured aggregations of attributes?

Aggregation settings for attributes tell IIH Essentials to continuously calculate aggregates for these variables. The results are not visible directly but will automatically speed up other features within the app. It is a way to optimize performance.

Aggregations in IIH Essentials are used either when synchronizing or when requesting data via API. When synchronizing, data is aggregated continuously as data comes in. In contrast, when requesting via API, all requested data will be aggregated at once. This will lead to issues and long loading times when requesting data of the last year, for example. For that reason, you can configure data to be pre-aggregated. The API /calculate will automatically utilize these pre-calculated aggregations.

Is it possible to use historical data in transformations?

No, unfortunately it is not possible. It is only possible to ingest live data from the connectors, transform it and then store it into the time series database.

Is there a plugin for Grafana?

Yes, it is available here. However, the plugin is only meant for development. No support or warranty of any kind for production use cases is provided.

When do I need which IIH app?

  • IIH Essentials provides the model, time series and alarm database.
  • IIH Semantics on the other hand, provides the OPC UA interface and a knowledge graph with GraphQL.
  • Both can be configured using Common Configurator, which can also configure connectors.

Can I drag and drop tags to quickly build asset models?

Tags can be (multi-)selected in the sidebar on the right side of the asset view. Once selected, they can be drag and dropped onto existing attributes or onto the "Create Attribute" button to create new attributes.

Can I view the hierarchy in a tree?

The hierarchy sidebar can be configured to display the hierarchy as a tree via "Settings > General > Hierarchy mode > Hierarchical".

Is there a way to export the data in a compressed format?

This feature is currently under development and will drastically reduce the size of a backup.

Which name restrictions apply when syncing to Insights Hub?

When synchronizing, the restrictions of the external service apply. In the case of Insights Hub the following name convention applies: "Name can consist of alphanumeric values as well as _ and must not start with a number".

Which license applies for IIH Essentials when used standalone?

The "Asset Attributes" package of IIH includes the full IIH Essentials and therefore also applies if used standalone.

Where can I find information about the license relevant resources?

You can see the used license-relevant resources under "Settings > Licensing information".

What kind of alarms are supported?

IIH supports all alarms provided by one of its interfaces supporting alarms:

  • Connectivity Suite connectors
  • WinCC via OpenPipe

What are the technical limits of IIH Essentials?

The IIH Essentials documentation provides limits for modelling and storing time series data. It also lists metrics tested on our hardware for specific setups as a reference. See here.

Can I send data to Azure or AWS via MQTT sync?

Yes, it is possible. However, the brokers of AWS or Azure require a specific configuration as some IIH Essentials options are not supported. For more information on how to configure the connection, click here.

Troubleshooting for Azure and AWS

Help with issues with Azure or AWS is available here