污染源在线自动监控（监测）系统数据传输和接口标准技术规范（征求意见稿）编制说明目录1背景..........................................................................................................................................12规范制定的必要性..................................................................................................................13规范制定的原则与依据...........................................................................................................24任务来源..................................................................................................................................25编制过程..................................................................................................................................26主要内容说明..........................................................................................................................36.1规范的范围..................................................................................................................36.2对定义的解释..............................................................................................................36.3对系统结构的描述.......................................................................................................36.4通讯接口的定义...........................................................................................................46.5协议的层次结构...........................................................................................................46.6协议交互的模式...........................................................................................................66.7通讯流程......................................................................................................................66.7.1请求命令（四步或者三步）...........................................................................66.7.2上传命令（一步）...........................................................................................66.7.3通知命令（两步）...........................................................................................76.8超时重发机制..............................................................................................................76.8.1请求回应的超时...............................................................................................76.8.2执行超时...........................................................................................................76.9通讯协议数据结构的说明...........................................................................................86.10数据段结构组成描述...............................................................................................87重要数据选择.........................................................................................................................117.1系统编码表.................................................................................................................117.2执行结果定义.............................................................................................................117.3请求返回.....................................................................................................................117.4命令列表.........................................................................................
