Welcome to the Crosser Knowledge Base

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Documentation

The Crosser Platform Documentation and technical walk-trough.

FAQ

The most common questions and answers collected in one place.

Academy

The Crosser Academy offers free training courses and certification.

What happens to the order of messages in the queue if the first message fails to deliver but new messages arrive?

Understanding message queues: Failed messages go to a dead letter queue and can be restored or deleted via the Node API if persistence is enabled.

How do we handle or track messages that get dropped from the message queue before the connection is re-established?

Tracking dropped messages: With persistent messages enabled, dropped messages go to the dead letter queue and can be restored or deleted via the Node API.

What should I do when recreating a Crosser Edge Node with a different name on the same host machine?

Recreating a Crosser Edge Node on the same host with a different name.

Keeping state in Flows

The Crosser Node has a key/value store that can be used to keep state in Flows.

Dynamic tag lists with OPC UA

Sometimes the data to get from an OPC UA server is not known in advance, you want to define it dynamically when the flow runs. Either generate it internally in the flow or use data from an external system.

The ‘Time Stamp’ and ‘Time Difference’ Modules

The 'Time Stamp' module is useful for adding the current date and time to messages, converting timestamp formats, and adjusting time zones by specifying the desired output format.

The ‘If Else Condition’ Module

Simplify condition-based processing or build multi-path flows in a more visual way using the 'If Else Condition' Module.

Scaling OT connectivity

Learn how to design flows that connect multiple devices without duplicating efforts.

The AVEVA Historian Reader Module

Get ready-to-use data from your AVEVA Historian by defining tags and adding metadata through resource files

Authenticating with IFS

In this article we explain how to configure your IFS system to get access to specific APIs and how to use the credentials in Crosser.