Original equipment manufacturers (OEMs) all have proprietary communication protocols such as Profinet, CIP, DeviceNet, and ControlNet used to communicate with all their devices on the plant floor. As we know, there are different manufacturers of controllers, instruments, and peripheral devices, which leaves the question of how to make them exchange data with each other. This led to open-source protocols that bridge the gap left by proprietary protocols in communicating with third-party devices. Standard open protocols are Modbus, OPC DA, OPC UA, MQTT. This article will look in-depth into the MODBUS protocol, its benefits, types, and implementation.
This is a companion discussion topic for the original entry at https://www.solisplc.com/tutorials/modbus