Modbus协议最初由Modicon公司开发出来，在1979年末该公司成为施耐德自动化(Schneider Automation)部门的一部分，现在Modbus已经是工业领域全球最流行的协议。此协议支持传统的RS-232、RS-422、RS-485和以太网设备。许多工业设备，包括PLC，DCS，智能仪表等都在使用Modbus协议作为他们之间的通讯标准。有了它，不同厂商生产的控制设备可以连成工业网络，进行集中监控。-Modicon Modbus protocol originally developed by the out at the end of 1979 it became the Schneider Automation (Schneider Automation) department as part of Modbus is now the world' s most popular industrial protocol. The protocol supports a traditional RS-232, RS-422, RS-485 and Ethernet devices. Many industrial equipment, including PLC, DCS, intelligent instruments and so on using the Modbus protocol as standard for communication between them. With it, different manufacturers of industrial control equipment can be connected into the network, centralized control.