SF4100 Modbus Communication plug-ins Modbus RTU，COM、ASCII

Modbus RTU Communication Operations Manual

Overview

This example is used to demonstrate how a serial adapter can be used to connect a personal PC to an iComputer, and a local modbusslave or modbus poll can be simulated for master-slave communication.

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Purpose of the experiment

RS485 communication

The iComputer is used as the master station, the simulation assistant is used as the slave station, and the master slave station can read and write data
The iComputer is used as a slave and the simulation assistant is used as a master, and the master slave can read and write data
The iComputer is used as the master station, and the other is the slave station, and the master station slave can read and write data
RS232 communication

The iComputer is used as the master station, the simulation assistant is used as the slave station, and the master slave station can read and write data
The iComputer is used as a slave and the simulation assistant is used as a master, and the master slave can read and write data
The iComputer is used as the master station, and the other is the slave station, and the master station slave can read and write data

Experimental hardware and software equipment

Hardware: Two iComputer SX5s, serial cable mowestar NS820I

Software: MetaFacture1.0.4.1, Modbusslave, Modbuspoll, Master so file, Slave so file, Slave Library

As shown in the figure above, connect to the iComputer

As shown in the figure above, the right side is connected to the personal PC through a USB cable, and the left side is "RS485", "RS422", "RS232" serial ports, and "RS485" and "RS232" are used in this experiment.

iComputer COM port description

As shown in the figure above, the eight-pin description of the iComputer com/can port is illustrated.

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