Configure a Modbus TCP source (CLI)

You can define Modbus TCP data sources in a SiteWise Edge gateway capability. You must define all of your Modbus TCP sources in a single capability configuration.

Note

You must install the AWS IoT SiteWise connector to use a Modbus TCP source.

This capability has the following versions.

Version	Namespace
1	iotsitewise:modbuscollector:1

Modbus TCP capability configuration parameters

When you define Modbus TCP sources in a capability configuration, you must specify the following information in the capabilityConfiguration JSON document:

sources

A list of Modbus-TCP source definition structures that each contain the following information:

name

A unique, friendly name for the source.

measurementDataStreamPrefix

(Optional) A string to prepend to all data streams from the source. The SiteWise Edge gateway adds this prefix to all data streams from this source. Use a data stream prefix to distinguish between data streams that have the same name from different sources. Each data stream should have a unique name within your account.

destination

A destination structure that contains the following information:

type

The type of the destination.

streamName

The name of the AWS IoT Greengrass stream.

streamBufferSize

The size of the stream buffer.

endpoint

An endpoint structure that contains the following information:

ipAddress

The IP address of the Modbus TCP source.

port

(Optional) The port of the Modbus TCP source.

unitId

(Optional) The unitId. This defaults to a value of 1.

minimumInterRequestDuration

The minimum duration between each request in milliseconds.

propertyGroups

The list of property groups that define the tag definition requested by the protocol.

name

The name of the property group. This should be a unique identifier.

tagPathDefinitions

The location of the measurement within the source. For example, the byte and word order, address, and transformation type. The structure of each MeasurementPathDefinition is defined by the connector.

scanMode

Defines the scan mode behavior and configurable parameters for the source.