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Writing to Modbus Devices
APN0020 | Revision 1.2 | April 8, 2026
Writing to Modbus devices using scripts allows Senquip devices to not only read data, but actively control and configure external equipment. This application note explains how to construct Modbus write messages, including function code 0x06 for 16-bit registers and 0x10 for 32-bit floating point values. It covers message structure, CRC calculation, register addressing, and practical scripting examples using Senquip’s mJS environment. With step-by-step examples and working scripts, this guide shows how to implement reliable Modbus communication for remote monitoring and control of industrial devices.
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