[Tutorial] Modbus an Introduction

Modbus is the most commonly used industrial communication protocol for various devices & sensors to send and receive data. It is an request response protocol with master and slave devices connected to gether in a network, meaning master device will poll one or more slave devices and slave devices can only send data as a response to master device Types of Modbus Commonly there are three different types of modbus protocols operating in different OSI layer models but the underlying protocol is the same »