网络管理：现场总线管理层7。提供用于总线和通信关系组态的服务、运行阶段的监视和诊断服务以及建立和释放管理连接服务。功能分成三组：1）上下关系管理2）组态管理 3）故障管理 -Network Management: Fieldbus management 7. Provide for communication between the bus and the configuration of services, the operational phase of the monitoring

将MODBUS协议写入到AVR单片机，可与组态软件进行通信。注意协议是用汇编写的。-The MODBUS protocol is written to the AVR microcontroller, can communicate with the configuration software. Note that the agreement is written in assembler.