目录1．系统简介.......................................................................................................................................32．与信号机之间的通信...................................................................................................................32.1 继电器..................................................................................................................................32.2 RS485 通讯.........................................................................................................................42.3 网络通讯..............................................................................................................................43．通用通信协议...............................................................................................................................43.1 数据帧格式..........................................................................................................................43.1.1 帧结构......................................................................................................................43.1.2 校验码、帧开始和帧结束..................................................................................... 43.1.3 数据表......................................................................................................................53.2 通讯规程..............................................................................................................................63.2.1 字节顺序..................................................................................................................63.2.2 链路地址..................................................................................................................63.3 通信内容..............................................................................................................................63.3.1 校时(0x02)..............................................................................................................63.3.2 脉冲数据(0x08)..................................................................................................... 63.3.3 实时车速(0x41)..................................................................................................... 73.3.2 排队长度(0x42)..................................................................................................... 73.3.4 过车状态(0x46)..................................................................................................... 83.3.5 平均车速(0xA0)..................................................................................................... 83.3.6 时间占有率(0xA1)................................................................................................. 93.3.7 事件检测(0xB1)..................................................................................................... 93.3.8 统计数据(0x51)................................................................................................... 103.3.9 排队统计数据(0x52)........................................................................................... 10
评论