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Protocol

Protocol为进行网络中的数据交换而建立的规则、标准或约定。用于不同系统中实体间的通信。两个实体要想通信,必须有“同一种语言”,而且,对于通信内容,怎样通信和何时通信,都必须遵守一定的规定,这些规定就是协议。亦可简单地定义为:控制两实体间数据交换的一套规则。在电子通讯连接中,各个不同的层次都有自己的协议。例如,在硬件设备层次和应用程序层次的数据交换都有自己的协议。在开放式系统互连(OSI)标准模式中,每个层都有一到两种协议,发生通讯的两个终端都必须能识别和遵守协议。协议通常以工业或国际标准的形式被描述。
  • Telecommunications+Networks

    Rapid progress in information and communications technology (ICT) induces improved and new telecommunications services and contributes greatly to society in general and to vendors and network and service providers. In addition to existing services such as telephony or leased line services, spread of the Internet, the Internet Protocol (IP) phone, and new communications services like IPTV are making great progress with the development of digital subscriber lines (DSL) and high - speed communications technologies like fi ber to the home (FTTH). 

    标签: Telecommunications Networks

    上传时间: 2020-06-01

    上传用户:shancjb

  • UMTS+Performance+Measurement+A+Practical+Guide

    Having dealt with in-depth analysis of SS#7, GSM and GPRS networks I started to monitor UTRAN interfaces approximately four years ago. Monitoring interfaces means decoding the data captured on the links and analysing how the different data segments and messages are related to each other. In general I wanted to trace all messages belonging to a single call to prove if the network elements and Protocol entities involved worked fine or if there had been failures or if any kind of suspicious events had influenced the normal call proceeding or the call’s quality of service. Cases showing normal network behaviour have been documented in Kreher and Ruedebusch (UMTS Signaling. John Wiley & Sons, Ltd, 2005), which provides examples for technical experts investigating call flows and network procedures.

    标签: Performance Measurement Practical Guide UMTS

    上传时间: 2020-06-01

    上传用户:shancjb

  • Ecodesign+Preparatory+Study

    Since the 1990s the EU has been pursuing climate change mitigation targets. Following the international commitment to the legally binding greenhouse gas reduction under the Kyoto Protocol, the 2020 policy package consists of a set of binding legislation to ensure that the EU meets its climate and energy targets for the year 2020. The package sets three key targets: 20% reduction in greenhouse gas emissions (from 1990 levels), 20% of EU energy from renewables (as well as a 10% target for renewable fuels) and 20% improvement in energy efficiency. The targets were set by EU leaders in 2007 and enacted in legislation in 2009 3 . They are also headline targets of the Europe 2020 strategy for smart, sustainable and inclusive growth.

    标签: Preparatory Ecodesign Study

    上传时间: 2020-06-06

    上传用户:shancjb

  • 欧母龙PLC例程PLC控制器源码255个合集

    欧母龙PLC例程PLC控制器源码255个合集:1600T俄罗斯压力机.rar200吨压机程序 omron 的机子C系列的.rar3MK136旧磨床现程序.rar3电机延时控制启停.rar5V编码器信号如何接入CP1H高数计数案例.rar6路抢答器源码.rar902002 OMRON.rarASCII Generic Protocol Macro Object Code.zipASCII Generic Protocol Macro.zipC3电枢异物吸引.rarCalendar Calculation.zipcarbon.rarCompact Flash Memory Write.zipCounter Multiplex.zipcp1h 高速计数触发中断注意点.rarcp1h-x40用在非标饮料线上的程序,有注解.rarCP1H与爱默生温控模块的通讯程序.rarCP1L and CP1H EasyModbus FB.zipCPM1A编写的赞扬15T立式注塑机.rarCPM2A Interupt High Speed Counting Sample.zipCPM2A自身时钟六个时间段触发程序.rarCQM1 Host Link Master.zipCQM1H 21的例子程序,有温度压力等PID控制。.rarCQMaster.swp.zipCS CJ CP NSJ password set.zipCS1 C Mode Hostlink.zipCS1-CJ1 Floating Point to Fixed Point Conversion for HMI.zipcub.rarCX-Programmer Ver.5 Introduction Guide R120-E1-01..zipCX-Programmer Ver.5 Introduction to Function Blocks Guide R121-E1-01.zipC_Mode_Hostlink.zipDeviceNet Explicit Message Example.zipdieban.rarEasy to use Modbus RTU Master for CP1L CP1H CJ1 CJ2 CS1.zipExample of Using Daylight Saving FB's.zipExample Scale Meter Protocol.zipFB Calculate Day Of Week.zipFB Day light savings function block.zipFB Extract Time Date into SecMin Hr Day Mth Yr.zipFB Scale with parameters.zipGKF1250离心机CXP.rargkf1250离心机cxpgkf离心机omron.rarJH21-200程序.rarLED液压机.rarlogging+ filewrite.ziplpr-des.rarModbus Protocol Macro Object Code.zipModbus Protocol Macro.zipModbus RTU Sample Code CJ1-SCB.rarModbus TCP Client using FB's.zipOmron CS1 Sequencer.zipOMRON E6CP绝对值编码器使用实例。编码器为8位格雷码输出.rarOmron Modbus Slave Ladder.zipOmron Plc 变频一带三例程.rarOMRON PLC编程示范.raromron--MOV傳送指令.raromron-cs1g-h-cpu42日本机的程序.rarOmron_CJ2_to_AB_EIP_Tag_Datalink_Example.rarOMRON接驳台.rarOMRON控制2伺服.rarOMRON温度,压力模拟量输入程序.rarOMRON照明设备程序.raromron的PLC案例程序.rarOMRON程序举例.rarOMRON程序举例2.rarOMRON纸病分析系统-PLC程序(CJ1G).zipomron脉冲输出到驱动器的程序.rarPCB 沉铜线程序.rarPID温度控制的PLC程序设计实例.rarPinstamp.zipPLC Clock adjustment with screen.zipPLC锰钢程序cpm2a.zipPolls and Writes setpoints to E5CK Process Controller - E5CK.swp.zipPRO9连拉.rarProcess states sequence logics.zipQuadrature Input for Standard CPM1A DC Inputs.zipRandom Number Generator.zipScaling in CJ1 CS1 PLC's.zipSMS - GSM PLC Communications.zipsony 公司 某机台控制程序.rarStepNext.cpt.zipSTUP Example.zipTemplate for Step-Step Next Sequence.zipToggle Button.zipTracking product on conveyor.zipTXD-RXD Quickstart Programs.zipTXD-RXD Serial Port Handling.zipUseable timer.zipV600-E5CK.zipV700-V720 RFID Protocol Macro.zipVB与OMRON PLC通讯源码.rarWoodwood Controler Example Protocol Program.zipYH32-315油压机程序.rar一个CJ1M的程序.rar一个OMRON程序,带位置控制模块.rar一个生产线上润滑控制的小程序.rar一些简单的cpm1a程序.rar一控三恒压供水程序.rar三层提升机欧姆龙CQM1H程序.rar三菱400吨和200号冲床程序.rar上海产自动模切机飞达部程序.zip上海狮印全自动啤机程序.rar东芝压铸机梯形图.rar两步法吹瓶机.rar乡林剪台.rar买书的随书样例.rar井研磨边机.rar交通灯注释全.rar今机立式注塑机程序.rar伺服电机正反转控制.rar位置控制(旋转编码器与PLC).rar充磁机程序.rar先启后停 后启先停 事例.rar冲床程序.rar分拣线主机一个CJ1M的分拣线程序下挂CP1H.rar利慧利乐灌装机程序.rar刮水器停止位置检查程序.rar力泰翻胚机程序.rar北人04印刷机程序.rar北人LQD10骑马装订程序.rar半自动吹瓶机的程.rar南京印刷机.zip卡板程式.rar压制机程序(带解释,注释).rar压力机控制程序.rar原创液压机程序带注释欧姆龙PLC加信捷文本.rar原点搜索程序.rar双翻分拣机.rar双边机.rar反渗透整套PLC控制.rar台湾产染色机欧姆龙PLC带3只IO扩展控制程序.rar台湾大拉无板.rar啤酒厂酒瓶美容机.rar四川绵阳建丰热磨工段.rar在用设备程序.rar垂直涂布.rar外端子设计数值.rar大型热电厂 PLC程序(带注解).rar大摇动超声波清洗机.rar大连75密练注释程序.rar安呼12级.rar富佳扶梯程序.rar对齐度编程!!.rar小车控制程序.rar小车送料”例程.rar广东锻压气压冲床程序(80T)有详细注解.rar广告牌灯箱.rar微电机刷簧自动组装程序.rar微粉砖自动送料带OMRON CQM2A+扩展程序带注释.rar意大利进口皮革压花.rar扎钢机程序.rar打包机.rar拔盖机.rar拨码控制.rar挡砖磨边机(新1).rar捷豹空压机控制程序.rar接木机.rar控制程序例子.rar推挂.rar攻丝机2(新).rar料位显示.rar旋转门控制程序1.rar无协议.rar无心磨床(OMRON系统,带机械手有详细注解).rar无线胶装机欧姆龙程序.zip日本人编的程序 抛光研磨.rar日本成型磨床控制程序(附注释)欧姆龙CPM1A.rar板坯定厚.rar样例,有注释.rar模拟量试验.rar欧姆龙CJ1M铬化机程序带注释.rar欧姆龙CP1H例程.rar欧姆龙CPM1A的PLC.rar欧姆龙CPM2AH  PLC和欧姆龙NTZ触摸屏编写的超声波清洗机程序..rar欧姆龙CPM2AH Host Link通讯程序(发布源码).rar

    标签: plc 控制器

    上传时间: 2021-10-22

    上传用户:

  • 集成多种协议 用于 USB-A 和 TYPE-C 双端口输出的快充协议 IC2726

    IP2726_AC_FBR 是一款集成多种协议、用于 USB-A 和 TYPE-C 双端口输出的快充协议 IC。支持多 种快充协议,包括 USB TypeC DFP,PD2.0/PD3.0/PPS ,  HVDCP QC4+/QC4/QC3.0/QC2.0(Quick Charge),FCP (Hisilicon® Fast Charge Protocol),SCP(Super Fast  Charge),AFC(Samsung® Adaptive Fast Charge), MTK PE+ 2.0/1.1( MediaTek Pump Express Plus  2.0/1.1),Apple 2.4A,BC1.2 以及 2.0A。为适 配器、车充等单向输出应用提供完整的 TYPE-C 解决 方案。 IP2726_AC_FBR 具备高集成度与丰富功能,在 应用时仅需极少的外围器件,有效减小整体方案的 尺寸,降低 BOM 成本。

    标签: usb

    上传时间: 2022-02-24

    上传用户:xsr1983

  • IP2723

    IP2723T 是一款集成多种协议、用于 USB 输出 端口的快充协议 IC。支持多种快充协议,包括 USB  TypeC DFP , PD2.0/PD3.0/PPS , HVDCP  QC4/QC4+/QC3.0/QC2.0 ( Quick Charge ), FCP (Hisilicon® Fast Charge Protocol),SCP(Super Fast  Charge),AFC(Samsung® Adaptive Fast Charge), MTK PE+ 2.0/1.1(MediaTek Pump Express Plus  2.0/1.1),Apple 2.4A,BC1.2 以及三星 2.0A。为适 配器、车充等单向输出应用提供完整的 TYPE-C 解决 方案。

    标签: IP2723

    上传时间: 2022-03-04

    上传用户:

  • 基于RS-485总线的MODBUS通信协议在单片机上的实现

    以仓库智能改造为背景,主要介绍单片机和上位机之间通信网络和通信协议的选择,MODBUS协议通信指令和功能码使用,重点阐述了基于RS-485总线的MODBUS通信协议在上位机和单片机之间的串行通信,实现上位机对单片机设备的远程控制和信息采集的功能。Based on the intelligent warehouse transformation as the background,mainly introduces between MCU and PC communication network and the choice of communication Protocol,instruction and the function code using the MODBUS Protocol communication,expounds the MODBUS communication Protocol based on RS-485 bus serial communication between PC and single chip microcomputer,PC remote control of single chip computer equipment and the function of information collection.

    标签: RS-485总线 modbus 单片机

    上传时间: 2022-03-26

    上传用户:

  • HDMI 2.0 Spec

    HDMI-Definition Multimedia Interface Specification Version 2.0This document constitutes the Version 2.0 specification for the High-Definition Multimedia Interface (HDMI Specification Version 2.0). This Specification incorporates HDMI Specification Version 1.4b by reference and defines additional and improved functionality. Mechanical, behavioral, and Protocol requirements necessary for compliance are described for Sources, Sinks, Repeaters, and Cables.

    标签: hdmi

    上传时间: 2022-04-22

    上传用户:

  • FreeModbus 英文资料

    If register should be written or read.This value is passed to the calback functions which support either reading or writing register values. Writing means that the application registers should be updated and reading means that the modbus Protocol stack needs to know the current register values.See also: eMBRegHoldingCB(), eMBRegCoilsCB(), eMBRegDiscreteCB() and eMBReglnputCB().Enumeration values: MB_REG_READ Read register values and pass to Protocol stack.MB_REG_WRITE Update register values.Note: Note all ports implement this function.A port which wants to get an callback must define the macro MB_PORT_HAS_CLOSE to 1.Returns: If the resources where released it return eMBErrorCode:: MB_ENOERR. If the Protocol stack is not in the disabled state it returns eMBErrorCode:: MB_EILLSTATE.Examples: LINUX/demo.c, MCF5235TCP/demo.c, STR71XTCP/demo.c, WIN32/demo. cpp, and WIN32TCP/demo. cpp.his function disables processing of Modbus frames.Returns: If the Protocol stack has been disabled

    标签: FreeModbus

    上传时间: 2022-05-31

    上传用户:

  • LWIP的底层结构

    Lwip协议栈的实现目的,无非是要上层用来实现app的socket编程。好,我们就从socket开始。为了兼容性,lwip的socket应该也是提供标准的socket接口函数,恩,没错,在src\inc lude\lwip\socket.h文件中可以看到下面的宏定义:#if LWIP COMPAT SOCKETS#define accept(a,b,c)Iwip accept(a,b,c)#define bind(a,b,c)Iwip bind(a,b,c)#define shutdown(a,b)Iwip shutdown(a,b)#define closesocket(s)Iwip close(s)好,这个结构先不管它,接着看下get socket函数的实现【也是在src\api\socket.c文件中】,在这里我们看到这样一条语句sock =&sockets[s];很明显,返回值也是这个sock它是根据传进来的序列号在sockets数组中找到对应的元素并返回该元素的地址。好了,那么这个sockets数组是在哪里被赋值了这些元素的呢?进行到这里似乎应该从标准的socket编程的开始,也就是socket函数讲起,那我们就顺便看一下。它对应的实际实现是下面这个函数Int Iwip socket(int domain,int type,int Protocol)【src\api\socket.c】这个函数根据不同的协议类型,也就是函数中的type参数,创建了一个netconn结构体的指针,接着就是用这个指针作为参数调用了alloc socket函数,下面具体看下这个函数的实现

    标签: lwip 底层结构

    上传时间: 2022-06-19

    上传用户:aben