WHITEPAPER: Introduction to Modbus

Introduction to Modbus

The following information describes the operation of Modbus as it relates to Acromag Series 900MB I/O modules. Acromag manufactures a line of I/O modules that support Modbus over RS485.

The Modbus protocol provides an industry standard method that Modbus devices use for parsing messages.
This protocol was developed by Modicon, Incorporated, for industrial automation systems and Modicon programmable controllers.