melsec协议通讯报文.docVIP

melsec协议通讯报文 篇一：通信协议参考 通信协议 参考 开发单位： 修改历史 目 录 1 引言 ························································································································· 2 1.1 SCP功能简介 ···································································································· 2 2 SCP约定··················································································································· 2 2.1 2.2 2.3 数据类型定义 ··································································································· 2 字节序 ·············································································································· 3 控制指令格式 ··································································································· 3 3 协议细则·················································································································· 4 3.1 3.2 web登录 ··········································································································· 4 用户信息获取 ··································································································· 5 4 实时视频帧格式······································································································· 6 4.1 4.2 4.3 客户端发实时视频请求：见第3节 实时视频管理 ·········································· 6 IPC回发实时视频请求响应：见第3节 实时视频管理···································· 6 实时视频帧格式：···························································································· 6 1 引言 本文档描述了IPC系统与客户端（PC端）通信内容、流程和格式。 1.1 SCP功能简介 通信协议SCP（Sys Communication Protocol）用于IPC系统与客户端（PC端）的通信。 2 SCP约定 2.1 数据类型定义 N：整数 N+：正整数（不包含0） Byte：一个字节范围的数（0 - 255） C：单个字符 S：字符串 X：十六进制的流 DT：日期/时间格式字符串（2003-12-20 03:02:13），北京时间。 D：日期格式字符串（2003-12-20），北京时间。 T：时间格式字符串（03:02:13），北京时间。 B：布尔类型（0、1） B+：布尔类型的字符串表示（false、true） IP：IP地址格式的字符串（23） 2.2 字节序 本协议中所有涉及内容，如无特别说明，均采用主机字节序。 2.3 控制指令格式 SCP采用请求/响应模式。请求由指令头＋指令体组成，响应由返回指令头＋指令体组成。其中，指令体的编码语言是XML（eXtensible Markup Language）。如