摘  要：触摸屏常常用作永磁同步伺服系统中的控制器，通过Modbus通信协议与驱动器进行数据交换。文章针对触摸屏的主要功能，详细介绍了Modbus协议中常见功能的实现、CRC-16校验码的生成，然后给出了驱动器中DSP与触摸屏通信接口的硬件和软件设计。所得结果可作为标准模块嵌入通用伺服驱动器。关键词： Modbus协议；触摸屏；DSP；永磁同步伺服系统

Abstract: The touch screen is usually used as the controller in the permanent magnetic synchronous servo control system,it exchanges the data with the driver by means of Modbus protocol.In this paper,introduced the main functions and the CRC generation of the protocol.Then designed the hardware and the software pertinent to the interface between the touch screen and the DSP.The results can be embedded in the general servo drives as a standard module.
Key Words: Modbus protocol；Touch screen；DSP；Permanent magnetic synchronous servo control system