Overview

This manual is to introduce USR-WIFI232-630(Serial to WiFi Converter) Modbus RTU transfer to Modbus TCP function.

1.Function introduction

Modbus protocol is application layer message transport protocol. Modbus protocol has following two communication method:

l  Modbus TCP: Based on Ethernet and TCP/IP protocol.

l  Modbus RTU/Modbus ASCII: Based on asynchronous serial transmission(Such as RS232/RS422/RS485). 

USR-WIFI232-630(Serial to WiFi Converter)  supports Modbus RTU format data transfer to Modbus TCP format data.(Don’t support Modbus ASCII format data)

2.Configuration

User can configure 630 to Modbus RTU<=> Modbus TCP mode by Web Server as follow:

Figure 1 Configuration