AWS IoT SiteWise concepts - AWS IoT SiteWise

AWS IoT SiteWise concepts

The following are the core concepts of AWS IoT SiteWise:

Gateway

A gateway resides on the customer premises to collect, process, and route data. A gateway connects to industrial data sources by using OPC-UA, Modbus TCP, or Ethernet/IP protocols to collect data when processing or routing the data to the AWS cloud. Gateways use packs to collect data, process data at the edge, and more. For more information about available packs, see Using packs.

You can create a gateway on any device or platform that can run AWS IoT Greengrass. The gateway software is made up of connectors that you can add to your AWS IoT Greengrass group. For more information, see Ingesting data using a gateway.

Packs

Gateways use packs to decide how to collect, process, and route data. Currently, AWS IoT SiteWise supports the data collection pack and the data processing pack.. For more information about the available packs for your gateway, see Using packs.

Data collection pack

Use the data collection pack so that your gateway can collect your industrial data and route it to the AWS destination of your choice. This pack is automatically added to your gateway and can't be removed.

Data processing pack

Use the data processing pack so that your gateway can communicate with edge-configured asset models and assets. Gateways with the data processing pack automatically periodically sync with all asset models in your AWS account that are configured for the edge.

Asset

When you ingest data into AWS IoT SiteWise from your industrial equipment, your devices, equipment, and processes are each represented as assets. Each asset has data associated with it. For example, a piece of equipment might have a serial number, a location, a make and model, and an install date. It might also have time series values for availability, performance, quality, temperature, pressure, and so on. You can organize assets into hierarchies, where assets have access to the data stored in its child assets. For more information, see Modeling industrial assets.

Asset model

Every asset is created from an asset model. Asset models are declarative structures that standardize the format of your assets. Asset models enforce consistent information across multiple assets of the same type, so that you can process data in assets that represent groups of devices. In each asset model, you can define attributes, time series inputs (measurements), time series transformations (transforms), time series aggregations (metrics), and asset hierarchies. For more information, see Modeling industrial assets.

You can control where your asset model's properties are processed by configuring your asset model for the edge. Use this feature to process and monitor asset data on your local devices.

Source destination

You can use a source destination to control where to send the incoming data from your source server. You can either send your data to AWS IoT SiteWise, or you can use a AWS IoT Greengrass stream to send your data to a different location. You can configure your AWS IoT Greengrass stream to send your data to an on-premises application, or to the AWS Cloud. You configure a source destination for each source server in your gateway.

Asset property

Asset properties are the structures within each asset that contain industrial data. Each property has a data type and can have a unit. A property can be an attribute, a measurement, a transform, or a metric. For more information, see Defining data properties.

You can configure asset properties to compute at the edge. For more information about processing data at the edge, see Process data locally with AWS IoT SiteWise.

Attribute

Attributes are asset properties that represent information that generally doesn't change, such as device manufacturer or device location. Attributes can have default values. Each asset that you create from an asset model contains the default values of the attributes of that model. For more information, see Defining static data (attributes).

Measurement

Measurements are asset properties that represent a device or equipment's raw sensor time series data streams. For more information, see Defining data streams from equipment (measurements).

Transform

Transforms are asset properties that represent transformed time series data. Every transform has a mathematical expression (formula) that defines how to transform data points from one form to another. The transformed data points hold a one-to-one relationship with the input data points. For more information, see Transforming data (transforms).

Metric

Metrics are asset properties that represent aggregated time series data. Every metric has a mathematical expression (formula) that defines how to aggregate data points, and a time interval over which to compute that aggregation. Metrics output a single data point per given time interval. For more information, see Aggregating data from properties and other assets (metrics).

Aggregate

Aggregates are basic metrics that AWS IoT SiteWise automatically computes for all time series data. For more information, see Querying asset property aggregates.

Asset hierarchy

You can define asset hierarchies to create logical representations of your industrial operations. To create a hierarchy, you define a hierarchy definition in an asset model, and then you associate assets created from that model and the model specified in the hierarchy definition. Metrics in parent assets can aggregate data from child assets' properties, so you can calculate statistics that provide insight to your operation or a subset of your operation. For more information, see Defining relationships between assets (hierarchies).

Formula

Every transform and metric property has a formula that defines how that property transforms or aggregates data. Formulas consist of property inputs, operators, and functions offered by AWS IoT SiteWise. For more information, see Using formula expressions.

Property alias

You can define aliases on asset properties to easily identify an asset property when you ingest or retrieve asset data. When you use a gateway to ingest data from servers, your property aliases must match the paths of your raw data streams. For more information, see Mapping industrial data streams to asset properties.

Property notification

When you enable property notifications for an asset property, AWS IoT SiteWise publishes an MQTT message to AWS IoT Core each time that property receives a new value. The message payload contains information about that property value update. You can use property value notifications to create solutions that connect your industrial data in AWS IoT SiteWise with other AWS services. For more information, see Interacting with other AWS services.

Portal

An SiteWise Monitor portal is a web application that you can use to visualize and share your AWS IoT SiteWise data. A portal has one or more administrators and contains zero or more projects.

Portal administrator

Each SiteWise Monitor portal has one or more portal administrators. Portal administrators use the portal to create projects that contain collections of assets and dashboards. The portal administrator then assigns assets and owners to each project. By controlling access to the project, portal administrators specify which assets that project owners and viewers can see.

Project

Each SiteWise Monitor portal contains a set of projects. Each project has a subset of your AWS IoT SiteWise assets associated with it. Project owners create one or more dashboards to provide a consistent way to view the data associated with those assets. Project owners can invite viewers to the project to allow them to view the assets and dashboards in the project. The project is the basic unit of sharing within SiteWise Monitor. Project owners can invite users who were given access to the portal by the AWS administrator. A user must have access to a portal before a project in that portal can be shared with that user.

Project owner

Each SiteWise Monitor project has owners. Project owners create visualizations in the form of dashboards to represent operational data in a consistent manner. When dashboards are ready to share, the project owner can invite viewers to the project. Project owners can also assign other owners to the project. Project owners can configure thresholds and notification settings for alarms.

Project viewer

Each SiteWise Monitor project has viewers. Project viewers can connect to the portal to view the dashboards that project owners created. In each dashboard, project viewers can adjust the time range to better understand operational data. Project viewers can only view dashboards in the projects to which they have access. Project viewers can acknowledge and snooze alarms.

Dashboard

Each project contains a set of dashboards. Dashboards provide a set of visualizations for the values of a set of assets. Project owners create the dashboards and the visualizations that it contains. When a project owner is ready to share the set of dashboards, the owner can invite viewers to the project, which gives them access to all dashboards in the project. If you want a different set of viewers for different dashboards, you must divide the dashboards between projects. When viewers look at dashboards, they can adjust the time range.

Visualization

In each dashboard, project owners decide how to display the properties and alarms of the assets associated with the project. Availability might be represented as a line chart, while other values might be displayed as bar charts or key performance indicators (KPIs). Alarms are best displayed as status grids and status timelines. Project owners customize each visualization to provide the best understanding of the data for that asset.