Application Note

This application note explains how to send Modbus RTU write commands from a Senquip device to external controllers or meters. It covers Modbus function codes for writing coils and registers, addressing conventions, and the difference between holding and input registers. Example scripts demonstrate writing setpoints, clearing counters, and toggling digital outputs. Timing, bus termination, and CRC verification are discussed to ensure reliable communication. Troubleshooting tips include detecting no-response conditions and validating traffic using a Modbus sniffer. Implementing these methods allows complete read/write control of Modbus-enabled equipment directly from Senquip devices, supporting advanced automation and configuration tasks.

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