How can I simulate Modbus RTU master frames? How can I detect Modbus RTU frames and evaluate or simulate Modbus slave telegrams?

How can I simulate Modbus RTU master frames? How can I detect Modbus RTU frames and evaluate or simulate Modbus slave telegrams?

Applies to: Docklight and Docklight Scripting (all versions), Article ID: dl_faq050

Using the example project below, you can easily build a basic Modbus protocol simulator or analyzer and extend it to meet your
own requirements, e.g. sending or receiving a specific type of Modbus function.

Docklight’s checksum generation and validation capabilities allow you to easily generate own Modbus RTU frames as well as detecting
a valid Modbus RTU frame within a data stream.

TIP: The example project contains additional documentation, which is especially convenient to view using our Docklight V2.3
preview/beta versions, as available now in our Docklight News section.

ModbusRtuCrc.zip – a documented example project for sending and receiving Modbus RTU telegrams

Docklight V2.3 Preview – added project doc support