摘要
首先介绍了 Modbus 通信协议以及 Modbus 监控网络结构,然后针对控制系统中需要以 PLC 为 Modbus 通信主站的情况,以西门子S7-200 PLC 对台达变频器进行远程控制为例,阐述了在以 Modbus 通信的方式对设备进行远程控制时 PLC 主站的软件设计方法,并对 Modbus 通信中的抗干扰技术进行了讨论。
This paper introduces the modbus protocol and the structure of modbus network firstly. Aimed at the PLC is needed to be a modl^us master station in some control system, the paper discusses the PLC software design and the way of eliminating disturbance when PLC is regarded as modbus master station. As an example of modbus communication, the remote control between Siemens S7-200 PLC and Delta frequency inverters is explained.
出处
《电气自动化》
北大核心
2007年第2期26-28,共3页
Electrical Automation
