Rockwell Automation / FactoryTalk Linx Gateway

Source: Rockwell Automation Official Website
(https://www.rockwellautomation.com/en-in.html)

FactoryTalk Linx Gateway gives external applications access to control data collected by FactoryTalk Linx. Third-party software can use data from Logix5000 and other supported Allen-Bradley controllers alongside existing FactoryTalk applications.

For a plant upgrade in India, this allows a new monitoring, MES or reporting application to use data from the existing Rockwell control system.

What to Know Before You Choose

• Use Gateway to expose data available through FactoryTalk Linx to external applications.
• Choose the edition by tag capacity and data-server location.
• Match MQTT and standalone-service requirements to the installed version.
• Test permissions, data quality and recovery after a connection failure.

Challenges FactoryTalk Linx Gateway Can Help Solve

Connecting Allen-Bradley Data with Third-Party Applications

FactoryTalk Linx Gateway adds OPC DA and OPC UA interfaces for external clients. A third-party HMI or data collection application with a compatible client interface can access the information collected by FactoryTalk Linx while the plant continues to use its FactoryTalk software.

Sharing Production Data through OPC UA and MQTT

OPC UA connects upper-level applications through a client/server interface. MQTT exchanges data through a broker. The destination application's interface and required transfer direction determine which connection to use.

MQTT capabilities vary by Gateway version. Publishing, receiving data and buffering outgoing messages were introduced in different releases, as outlined below.

Using Excel for Commissioning and Diagnostics

Excel RTD and DDE interfaces let engineers inspect control values in workbooks during startup or troubleshooting. This provides a way to check data before connecting the final application.

The Ordering Guide limits DDE and Excel RTD to software running on the same computer.

What Types of Sites Is FactoryTalk Linx Gateway Suitable For?

FactoryTalk Linx Gateway addresses projects where Rockwell control data is already available through FactoryTalk Linx and another application needs access. An Indian plant could retain its existing HMI while adding a separate reporting or monitoring system.

In a mixed-vendor plant, each controller still needs a supported communication path into the system. Equipment outside the existing connection scope may require additional communication software.

The OPC NEXUS directory lists OPC server vendors and their connection capabilities.

Key Specifications of FactoryTalk Linx Gateway

Supported Controllers and Connection Targets

FactoryTalk Linx communicates with supported Rockwell Automation control equipment. Gateway publishes that data to external clients.

FactoryTalk Linx OPC UA Connector handles the opposite direction: it brings information from third-party OPC UA servers into FactoryTalk applications. FactoryTalk Linx Data Bridge transfers data between FactoryTalk data sources. The source and destination determine whether a project needs these components alongside Gateway.

Supported Functions and Version Differences

Gateway can organise published data into custom OPC UA namespace folders. Other functions depend on the release:

• Version 6.40 added standalone OPC DA and DDE access to Logix, custom OPC UA folders and an option to cache the UA namespace on disk.
• Version 6.50 added MQTT publishing, extended tag properties for third-party software and additional OPC UA security support.
• Version 6.60 added MQTT subscription for receiving and writing data, plus publisher caching with configurable capacity and overflow handling. It also expanded standalone support to OPC UA, MQTT and Excel RTD.

The MQTT publisher cache buffers outgoing data during temporary disconnections. Its capacity and overflow policy need to account for the expected interruption and data rate.

Editions, Tag Capacity and Deployment Requirements

The Ordering Guide lists Basic, Standard, Extended, Distributed and Professional editions. Basic through Extended cover local or station configurations; Distributed and Professional support broader distributed configurations.

Tag limits differ by interface. An OPC UA capacity does not automatically apply to MQTT, OPC DA or Excel RTD, so the selected edition must cover the required interface as well as the tag count.

Before installation, check Windows and FactoryTalk component compatibility through Rockwell Automation's Product Compatibility and Download Center. Gateway also requires configured data-source shortcuts and appropriate FactoryTalk Security permissions.

FactoryTalk Linx Gateway Configuration Example

The documented architecture connects existing control data to an external OPC UA client through FactoryTalk Linx and Gateway. This is a configuration example, rather than a reported customer deployment.

Connecting Existing Control Data to an External OPC UA Client

Data passes from the controller through FactoryTalk Linx to Gateway's OPC UA service, then to the external client. The application scope and data-source shortcuts identify the tags to expose.

During commissioning, establish the UA connection and verify values in the receiving application. Before enabling writes in production, test both the permissions and the resulting equipment behaviour.

Planning a Similar Connection in India

A tag list defines the first test: which application needs each value, how often it must update, and whether it needs write access. Add the expected behaviour when a controller or network connection fails. The integrator can then verify one connection before extending it to other production areas.

Is a FactoryTalk Linx Gateway Trial Available?

The version 6.60 guide describes a seven-day grace period at the Professional activation level when no valid activation is found. Clients cannot connect to Gateway after that period expires.

Confirm installer access and the activation procedure with Rockwell Automation or its distributor before scheduling the evaluation. Allow enough time to test the connection and its recovery behaviour within the grace period.

Manufacturer Information

Rockwell Automation supplies industrial automation and information products, including the Allen-Bradley and FactoryTalk portfolios. Its India website provides sales enquiries, distributor search and technical support contacts. The page identifies which technical support services require TechConnect access.