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InteroperabilityThis companion standard presents sets of parameters and alternatives from which subsets must be selected to implement particular telecontrol systems. Certain parameter values, such as the choice of "structured" or "unstructured" fields of the INFORMATION OBJECT ADDRESS of ASDUs represent mutually exclusive alternatives. This means that only one value of the defined parameters is admitted per system. Other parameters, such as the listed set of different process information in command and in monitor direction allow the specification of the complete set or subsets, as appropriate for given applications. This clause summarizes the parameters of the previous clauses to facilitate a suitable selection for a specific application. If a system is composed of equipment stemming from different manufacturers, it is necessary that all partners agree on the selected parameters.The interoperability list is defined as in IEC 60870-5-101 and extended with parameters used in this standard. The text descriptions of parameters which are not applicable to this companion standard are strike-through (corresponding check box is marked black).NOTE In addition, the full specification of a system may require individual selection of certain parameters for certain parts of the system, such as the individual selection of scaling factors for individually addressable measured values.The selected parameters should be marked in the white boxes as follows:Function or ASDU is not usedFunction or ASDU is used as standardized (default) Function or ASDU is used in reverse modeFunction or ASDU is used in standard and reverse modeThe possible selection (blank, X, R, or B) is specified for each specific clause or parameter.A black check box indicates that the option cannot be selected in this companion standard. 1.1 System or device(system-specific parameter, indicate definition of a system or a device by marking one of the following with "X ")System definitionControlling station definition (Master)Controlled station definition (Slave)1.2 Network configuration(network-specific parameter, all configurations that are used are to be marked "X ") Point-to-point Multiple point-to-pointMultipoint-partyline Multipoint-starX R BX1.3 Physical layer(network-specific parameter, all interfaces and data rates that are used are to be marked "X ")Transmission speed (control direction)Unbalanced interchange Unbalanced interchange Balanced interchange Circuit V.24/V.28 Circuit V.24/V.28 Circuit X.24/X.27 Standard Recommended if >1 200 bit/sTransmission speed (monitor direction)Unbalanced interchange Unbalanced interchangeBalanced interchange Circuit V.24/V.28 Circuit V.24/V.28Circuit X.24/X.27 Standard Recommended if >1 200 bit/s1.4Link layer(network-specific parameter, all options that are used are to be marked "X". Specify themaximum frame length. Ifa non-standard assignment of class2 messages is implemented for unbalanced transmission, indicate the Type ID and COT of all messagesassigned to class 2.)Frame format FT 1.2, single character 1 and the fixed time out interval are used exclusively inthis companion standard.100 bit/s 200 bit/s 300 bit/s 600 bit/s1 200 bit/s2 400 bit/s 4 800 bit/s 9 600 bit/s 2 400 bit/s 4 800 bit/s 9 600 bit/s 19 200 bit/s 38 400 bit/s 100 bit/s 200 bit/s 300 bit/s 600 bit/s 1 200 bit/s 2 400 bit/s 4 800 bit/s 9 600 bit/s 2 400 bit/s 4 800 bit/s 9 600 bit/s 19 200 bit/s 38 400 bit/s 56 000 bit/s 64 000 bit/s Balanced transmission Unbalanced transmissionNot present (balanced transmission only) One octet Two octets Structured UnstructuredWhen usingan unbalanced link layer,the followingASDU types arereturned in class 2 messages (low priority) with the indicated causes of transmission:Note: (In response to a class 2 poll, a controlled station may respond with class 1 data when there is no class 2 data available).1.5 Application layerTransmission mode for application dataMode 1 (Least significant octet first), as defined in 4.10 of IEC 60870-5-4, is used exclusively in this companion standard.Common address of ASDU(system-specific parameter, all configurations that are used are to be marked "X")Information object address(system-specific parameter, all configurations that are used are to be marked "X")Cause of transmission(system-specific parameter, all configurations that are used are to be marked "X") One octet Two octetsOne octet StructuredTwo octetsoctetsUnstructuredThree octetsOne octet Two octets (with originatoraddress). Originator addressis set to zero if not usedThe standard assignment of ASDUs to class 2 messages is used as follows:A special assignment of ASDUs to class 2 messages is used as follows:Selection of standard ASDUsProcess information in monitor direction(station-specific parameter, mark each Type ID "X " if it is only used in the standard direction, "R " if only used in the reverse direction, and "B " if used in both directions).– <40> for ASDUs with time tag is permitted .<1> := Single-point information M_SP_NA_1 <30> := Single-point information with time tag CP56Time2a M_SP_TB_1 <31> := Double-point information with time tag CP56Time2a M_DP_TB_1 <32> := Step position information with time tag CP56Time2a M_ST_TB_1 <33> := Bitstring of 32 bit with time tag CP56Time2aM_BO_TB_1 <34> := Measured value, normalized value with time tag CP56Time2a M_ME_TD_1 <35> := Measured value, scaled value with time tag CP56Time2aM_ME_TE_1 <36> := Measured value, short floating point value with time tag CP56Time2aM_ME_TF_1 <37> := Integrated totals with time tag CP56Time2aM_IT_TB_1 <38> := Event of protection equipment with time tag CP56Time2aM_EP_TD_1<39> := Packed start events of protection equipment with time tag CP56Time2aM_EP_TE_1 <40> := Packed output circuit information of protection equipment with time tag CP56Time2a M_EP_TF_1<2> := Single-point information with time tag M_SP_TA_1 <3> := Double-point informationM_DP_NA_1 <4> := Double-point information with time tag M_DP_TA_1 <5> := Step position informationM_ST_NA_1 <6> := Step position information with time tag M_ST_TA_1 <7> := Bitstring of 32 bitM_BO_NA_1 <8> := Bitstring of 32 bit with time tag M_BO_TA_1 <9> := Measured value, normalized valueM_ME_NA_1 <10> := Measured value, normalized value with time tag M_ME_TA_1 <11> := Measured value, scaled valueM_ME_NB_1 <12> :=Measured value, scaled value with time tagM_ME_TB_1 <13> := Measured value, short floating point valueM_ME_NC_1 <14> := Measured value, short floating point value with time tag M_ME_TC_1 <15> := Integrated totalsM_IT_NA_1 <16> := Integrated totals with time tag M_IT_TA_1 <17> := Event of protection equipment with time tagM_EP_TA_1 <18> := Packed start events of protection equipment with time tagM_EP_TB_1 <19> := Packed output circuit information of protection equipment with time tag M_EP_TC_1 <20> := Packed single-point information with status change detectionM_SP_NA_1 <21> := Measured value, normalized value without quality descriptor M_ME_ND_1Process information in control direction(station-specific parameter, mark each Type ID "X " if it is only used in the standard direction, "R " if only used in the reverse direction, and "B " if used in both directions).System information in monitor direction(station-specific parameter, mark withan “X ” if it is onlyused in the standard direction, “R ” if only used in the reverse direction, and “B ” if used in both directions).System information in control direction(station-specific parameter, mark each Type ID "X " if it is only used in the standard direction, "R " if only used in the reverse direction, and "B " if used in both directions).<45> := Single commandC_SC_NA_1 <46> := Double command C_DC_NA_1 <47> := Regulating step commandC_RC_NA_1 <48> := Set point command, normalized value C_SE_NA_1 <49> := Set point command, scaled valueC_SE_NB_1 <50> := Set point command, short floating point value C_SE_NC_1 <51> := Bitstring of 32 bitC_BO_NA_1<70> := End of initialization M_EI_NA_1 <100>:= Interrogation commandC_IC_NA_1 <101>:= Counter interrogation commandC_CI_NA_1 <102>:= Read command C_RD_NA_1 <103>:= Clock synchronization command (option see 7.6) C_CS_NA_1 <104>:= Test command C_TS_NA_1 <105>:= Reset process command C_RP_NA_1 <106>:= Delay acquisition commandC_CD_NA_1 <107>:= Test command with time tag CP56Time2a C_TS_TA_1Parameter in control direction(station-specific parameter, mark each Type ID "X " if it is only used in the standard direction, "R " if only used in the reverse direction, and "B " if used in both directions).File transfer(station-specific parameter, mark each Type ID "X " if it is only used in the standard direction, "R " if only used in the reverse direction, and "B " if used in both directions).Type identifier and cause of transmission assignments (station-specific parameters)Shaded boxes are not defined in this companion standard and shall not be used. Black boxes: option not permitted in this companion standard Blank: functions or ASDU not used.Mark Type Identification/Cause of transmission combinations: "X " if only used in the standard direction; "R " if only used in the reverse direction; "B " if used in both directions.<110>:= Parameter of measured value, normalized valueP_ME_NA_1 <111>:= Parameter of measured value, scaled valueP_ME_NB_1 <112>:= Parameter of measured value, short floating point value P_ME_NC_1 <113>:= Parameter activationP_AC_NA_11.6 Basic application functionsStation initialization(station-specific parameter, mark "X " if function is used)Remote initializationCyclic data transmission(station-specific parameter,mark "X " iffunction is only usedin the standard direction, "R" if only used in the reverse direction, and "B " if used in both directions)Cyclic data transmissionRead procedure(station-specific parameter, mark "X " if function is only used in the standard direction, "R " if only used in the reverse direction, and "B " if used in both directions) Read procedureSpontaneous transmission(station-specific parameter, mark "X " if function is only used in the standard direction, "R " if only used in the reverse direction, and "B " if used in both directions) Spontaneous transmissionDouble transmission of information objects with cause of transmission spontaneous(station-specific parameter, mark each information type "X " where both a Type ID without time and corresponding Type ID with time are issued in response to a single spontaneous change of a monitored object)The following type identifications may be transmitted in succession caused by a single status change of an information object. The particular information object addresses for which double transmission is enabled are defined in a project-specific list. Single-point information M_SP_NA_1, M_SP_TA_1, M_SP_TB_1 and M_PS_NA_1 Double-point information M_DP_NA_1, M_DP_TA_1 and M_DP_TB_1 Step position information M_ST_NA_1, M_ST_TA_1 and M_ST_TB_1Bitstring of 32 bit M_BO_NA_1, M_BO_TA_1 and M_BO_TB_1 (if defined for a specific project) Measured value, normalized value M_ME_NA_1, M_ME_TA_1, M_ME_ND_1 and M_ME_TD_1Measured value, scaled value M_ME_NB_1, M_ME_TB_1 and M_ME_TE_1Measured value, short floating point number M_ME_NC_1, M_ME_TC_1 and M_ME_TF_1Station interrogation(station-specific parameter, mark "X " if function is only used in the standard direction, "R " if only used in the reverse direction, and "B " if used in both directions).Clock synchronization(station-specificparameter, mark"X "if function isonly used inthe standard direction,"R " ifonly used in the reverse direction, and "B" if used in both directions).optional, see 7.6Command transmission(object-specific parameter, mark "X " if function is only used in the standard direction, "R " if only used in the reverse direction, and "B " if used in both directions).global group 7 group 13 group 1 group 8 group 14 group 2 group 9 group 15 group 3 group 10 group 16group 4 group 11 group 5 group 12group 6 Information object addresses assigned to each group must be shown in a separate table.Clock synchronization Direct command transmission Direct set point command transmission Select and execute commandSelect and execute set point command C_SE ACTTERM used No additional definitionShort-pulse duration (duration determined by a system parameter in the outstation) Persistent output Long-pulse duration (duration determined by a system parameter in the outstation)Day of week used RES1, GEN (time tag substituted/ not substituted) used SU-bit (summertime) usedTransmission of integrated totals(station- or object-specific parameter, mark "X " if function is only used in the standard direction, "R " if only used in the reverse direction, and "B " if used in both directions).Parameter loading(object-specific parameter, mark "X " if function is only used in the standard direction, "R " if only used in the reverse direction, and "B " if used in both directions).Parameter activation(object-specific parameter, mark "X " if function is only used in the standard direction, "R " if only used in the reverse direction, and "B " if used in both directions).Test procedure(station-specific parameter, mark "X " if function is only used in the standard direction, "R " if only used in the reverse direction, and "B " if used in both directions).Counter readCounter freeze without reset Counter freeze with reset Counter resetGeneral request counter Request counter group 1 Request counter group 3Request counter group 2 Request counter group 4 Threshold value Smoothing factorLow limit for transmission of measured values High limit for transmission of measured valuesAct/deact of persistent cyclic or periodic transmission of the addressed objectMode A: Local freeze with spontaneous transmission Mode B: Local freeze with counter interrogationMode C: Freeze and transmit by counter-interrogation commandsMode D: Freeze by counter-interrogation command, frozen values reported spontaneously Test procedureFile transfer(station-specific parameter, mark "X " if function is used).File transfer in monitor directionFile transfer in control directionBackground scan(station-specific parameter, mark "X " if function is only used in the standard direction, "R " if only used in the reverse direction, and "B " if used in both directions).Acquisition of transmission delay(station-specific parameter, mark "X " if function is only used in the standard direction, "R " if only used in the reverse direction, and "B " if used in both directions).Transparent fileBackground scan Acquisition of transmission delay Transparent fileTransmission of disturbance data of protection equipment Transmission of sequences of events Transmission of sequences of recorded analogue values。
IEC60870-5-101及IEC60870-5-104远动通讯规约在大理供电局的应用摘要本文分析了CDT IEC60870-5-101、IEC60870-5-104（以下简称IEC101、IEC104）规约的优缺点，介绍了IEC101 IEC104规约在大理供电局的应用情况及使用过程中遇到的技术问题和解决方法。
关键词规约；CDT IEC60870-5-101；IEC60870-5-104The Application of IEC60870-5-101 and IEC60870-5-104 Protocol in Dali Power Supply Bureau0 引言长期以来，大理供电局远动通讯规约均采用循环式CDT规约，常用通道为电力载波专用通道及专用光纤数字通道。
随着电网规模的迅速扩大，各种新型设备的推广使用，以及无人值班、少人值守变电站管理模式的推广，变电站内需上送调度（集控站）信息量大大增加，的CDT规约已逐步显现出很多弊端，已经逐步成为制约我局远动自动化专业发展的一个重要因素。
1 各规约特点分析1.1 CDT规约特点CDT通讯规约经过多年的发展，已经非常成熟，它具有结构简单、易于调试、对通道质量要求较低等诸多优点，但随着电网的发展，CDT规约已逐步不能适应自动化专业的发展，主要表现在以下方面：1）传输容量有限CDT规约中遥测传输容量为256（DISA-CDT规约为512），遥信传输容量为512（DISA-CDT规约为8192）。
2）无抗报文丢失机制当通讯通道出现误码或其他某些特定的情况下会出现报文丢失，而此时下一帧报文同步头中的“EB”字节刚好符合上一帧错误报文的校验码，恰好通过校验，即造成大量遥信变位，严重干扰运行人员值班，具体表现为同一时间内集控站发生大量遥信变位信息，在短时间内又同时复归，查询变电站后台监控系统时当时无任何遥信变位记录及SOE记录，集控站历史库又无相关的SOE记录。
IEC-60870-5-101规约解析概述摘要：IEC-60870-5-101规约是调度端与场站端进行信息交互的一种规约，为国际电工委员会（IEC）在1995年制定，并于2001年将95版规约扩充，制定2002版即现行国内各主流调度、子站厂商全面应用的版本。
鉴于IEC-60870-5-101其在电力系统远动通讯规约的主导地位已经确立并且220kV电压等级风电场均已通过101规约将站内信息上送调度，本文将对如何解析IEC-60870-5-101报文进行阐述。
关键词：IEC-60870-5-101规约解析1规约总述IEC-60870-5-101规约是一种问答式规约，即你问我答、不问不答模式。
它有两种传输方式：平衡式传输和非平衡式传输。
平衡式传输中101规约是一种“问答+循环”式规约，即主站和子站都可以启动报文传输。
而当其用非平衡式传输时，只有主站端能启动报文传输。
101规约的报文在传输时，采用固定帧长和可变帧长及单个控制字符方式。
2 IEC101报文的帧格式2.1固定帧长帧格式固定帧长帧由5~6个字节组成，链路地址域可为一个或两个字节。
用于主站向子站的询问报文或者子站回答主站的确认报文。
具体格式如下表：报文示例: 10 5B 01 5C 16解析为请求二级用户数据，其中10为启动字符，5B为控制域，01为链路层地址，5C为检验和，16为结束字符。
2.2 可变帧长帧格式可变帧长用于主站向子站传输数据或子站向主站传输数据，具体格式如下表：表2 可变帧长帧格式报文示例：68 09 09 68 53 40 64 01 06 01 00 00 14 13 16其中68 09 09 68按上表解析为报文头，53为控制域字节，40为链路层地址转换为10进制为64，64为总召唤类型标识，01为可变结构限定词，06为传输原因，01为公共地址，00 00为信息体地址，14为信息体元素，13为帧校验和，16为结束字符。
3 应答过程就像规定了人说一句话第一个词说什么含义是什么一样，101报文的帧格式规定了报文中各个字符的定义和功能。
第一章.IEC870-5-101规约说明规约标准原文请参照国内1998-05-01实施的等同标准《远动设备及系统第5部分传输规约第101篇基本远动任务配套标准》。
参考模型：本标准中使用的参考模型是源于开放式系统互联的ISO-OSI参考模型，由于远动系统在有限带宽下要求特别短的反应时间，故改进采用增强性能结构（EPA），见下图所示：在这样的参考模型下，各层次数据单元之间的关系如下图所示：帧格式：1．固定帧长帧格式2．可变帧长帧格式FT1.2的传输标准要求线路上低位先传；线路的空闲为二进制的1；两帧之间的线路空闲间隔需不小于33位；每个字符包括1位起始位、1位停止位、1位偶校验位、8位数据位，字符间无需线路空闲间隔；信息字节求和校验（Check Sum）。
其中各部分的含义如下1)长度L＝C+A+链路用户数据的长度。
2)控制域C的定义如下：主站向子站传输时：DIR=0, PRM=1;子站向主站传输时：DIR=1, PRM=0。
主站向同一个子站传输新一轮的发送/确认和请求/响应传输服务时，将FCB位取反；主站为每一个子站保留一个帧计数位的拷贝，若超时没有从子站收到所期望的报文，或接收出现差错，则主站不改变帧计数位的状态，重复传送原报文，重复次数为3次。
FCV若等于0，FCB的变化无效。
主站向子站传输的功能码如下表所列：子站向主站传输的功能码如下表所列：1)链路地址域的内容指的是子站即RTU的站号，通常由调度与变电站协商确定。
2)链路用户数据（即前文所提到的ASDU）的结构如下：其中，各部分的解释如下：a.类型标识常用的有：子站-->主站过程信息1――不带时标的单点信息；2――带时标的单点信息；3――不带时标的双点信息；4――带时标的双点信息；5――步位置信息（变压器分接头信息）6――带时标的步位置信息（变压器分接头信息）（未用）7――子站远动终端状态（未用）9――测量值10――带时标的测量值（未用）15――电能脉冲计数量16――带时标的电能脉冲计数量（未用）17――带时标的继电保护或重合闸设备单个事件18――带时标的继电保护装置成组启动事件（未用）19――带时标的继电保护装置成组输出电路信息事件（未用）20――具有状态变位检出的成组单点信息21――不带品质描述的测量值22～24――为配套标准保留232――BCD码（水位值）主站 子站在控制方向的过程信息46――双点遥控命令（控单点也可）47――升降命令（未用）48――设定命令（未用）子站→主站在监视方向的系统信息70――初始化结束71～99――为配套标准保留主站→子站在控制方向的系统信息100――召唤命令101――电能脉冲召唤命令102――读数据命令（未用）103――时钟同步命令104――测试命令（未用）105――复位进程命令（未用）101～109――为配套标准保留b.可变结构限定词其结构如下：高位低位SQ=1：表明此帧中的信息体是按信息体地址顺序排列的。
SQ=0：表明此帧中的信息体不是按信息体地址顺序排列的。
信息体的个数小于128。
c.传送原因其字节的结构如下：高位低位P/N ＝0：肯定认可＝1：否定认可T ＝0：未试验＝1：试验传送原因＝1：周期、循环＝2：背景扫描＝3：突发＝4：初始化＝5：请求或被请求＝6：激活＝7：激活确认＝8：停止激活＝9：停止激活确认＝10：激活结束＝11：远程命令引起的返送信息（未用）＝12：当地命令引起的返送信息（未用）＝13：文件传送（未用）＝14～19：保留＝20：响应总召唤＝21：响应第一组召唤＝22：响应第二组召唤＝23：响应第三组召唤＝24：响应第四组召唤＝25：响应第五组召唤＝26：响应第六组召唤＝27：响应第七组召唤＝28：响应第八组召唤＝29：响应第九组召唤＝30：响应第十组召唤＝31：响应第十一组召唤＝32：响应第十二组召唤＝33：响应第十三组召唤＝34：响应第十四组召唤＝35：响应第十五组召唤＝36：响应第十六组召唤＝37：响应计数量总召唤＝38：响应第一组计数量召唤＝39：响应第二组计数量召唤＝40：响应第三组计数量召唤＝41：响应第四组计数量召唤＝42～47：为配套标准保留＝48～63：为特殊用途保留d.信息体地址信息体地址这一部分，不同调度系统厂家、不同区域、不同组织的定义会有所不同。
国内几个已经投入使用了几个接受IEC60870-5-101远动规约的调度系统，主要包括南瑞的SD6000系统、北京南瑞在天津城东应用的调度系统、广东中山应用的德国SIEMENS调度系统、华中网调应用的ABB调度系统等，这些调度系统对于信息体地址的定义不尽相同。
南瑞及其分公司的调度系统对于信息体的定义与全国电力远动通信标准化技术委员会颁布的标准定义相同，常用信息的具体定义如下：信息体地址为2个字节，范围为0～FFFFH；对于单点遥信，每一个遥信占用一个信息体地址；对于双点遥信，每一个点占用两个信息体地址；遥信的信息体地址服务为1H～400H。
继电保护单个事件的信息，每一个占用两个信息体地址，范围为501H～600H。
遥测值，每一个占用一个信息体地址，范围为701H～900H。
遥控、升降，每一个对象占用一个信息体地址，范围为B01H～B80H。
设定值，每一个占用一个信息体地址，范围为B81H～C00H。
电能脉冲计数量，每一个占用一个信息体地址，范围为C01H～C80H。
步位置信息，如变压器分接头，每一个占用一个信息体地址，范围为C81H～CA0H。
为了传送数据的方便，主站召唤数据的时候，可以将子站的数据分组上送，组的安排如下：第1组～第8组：遥信第9组～第12组：遥测第13组：步位置信息召唤电度时，电度量分4组，每组32个。
遥信每组最多128个信息体，各组起始地址如下：第1组1H第2组81H第3组101H第4组181H第5组201H第6组281H第7组301H第8组381H遥测每组最多128个信息体，各组起始地址如下：第9组701H第10组781H第11组801H第12组881H广东某远动系统引进的是德国Siemens的调度系统，其IEC870-5-101规约的信息体地址安排类似于它的另一个规约SINAUT 8规约，每个地址包括3个字节具体如下：点容量分别如下：华中网调引进的ABB的调度系统对于信息体地址的定义与国家标准比较相似，每个地址也是2个字节，具体如下：单点遥信，每一个遥信占用一个信息体地址；双点遥信暂时没有用到；遥信的信息体地址服务为1H～FFFH。
遥测值，每一个占用一个信息体地址，范围为4000H～4FFFH。
遥控、升降，每一个对象占用一个信息体地址，范围为9000H～9FFFH。
电度量暂未使用。
在这个系统中，因为不采用分组召唤的方式，所以没有“组”的概念。
e.信息体元素经常用到的信息体元素主要包括以下几种：☆带品质描述的单点信息SIQSPI（1bit）＝0：OFF（开）RES（3bit）：保留＝1：ON （合）BL （1bit ）＝0：未被闭锁SB （1bit ）＝0：未被取代 ＝1：被闭锁＝1：被取代NT （1bit ）＝0：当前值IV （1bit ） ＝0：有效 ＝1：非当前值＝1：无效☆ 带品质描述的双点信息DIQDPI （2bit ） ＝0：中间状态或不确定RES （2bit ）：保留＝1：确定状态OFF （开）＝2：确定状态ON （合）＝3：中间状态或不确定☆ 带瞬变状态指示的值VTI （如变压器分接头信息）T （1bit ）＝0：设备未处于瞬变状态 V ALUE ＝值{-64~+63}＝1：设备处于瞬变状态 ☆ 模拟量模数转换器的最高位为2－，如模数转换器不是16位，而是12位的，则低位补0。
☆ 日历时钟0～59999ms 0～59min 0～23h1～7，Day of week 1～31，Day of month 1～12，Months 0～99，Years☆ 遥控命令DCOS/E ＝0：执行 ＝1：选择QU ：目前固定为0DCS ＝0：不允许＝1：OFF，开＝2：ON，合＝3：不允许☆时标☆继电保护装置的单个事件SEPES（2bit）＝0：不确定RES（2bit）：保留＝1：OFF（开）EI（1bit）＝0：动作时间有效＝2：ON（合）＝1：动作时间无效＝3：不确定☆对于继电保护装置的事件的品质描述QDPRES（3bit）☆单点信息事件顺序记录☆双点信息事件顺序记录☆继电保护装置或重合闸单个事件顺序记录继电保护或重合闸动作持续时间、继电保护或重合闸动作时间 事件顺序记录时标☆ 带时标的步位置信息如变压器分接头☆ 电能召唤命令的限定词QCCFRZ （2it ） ＝0：请求计数量＝1： 冻结不带复位 EI （1bit ）＝0：动作时间有效＝2： 冻结带复位 ＝1：动作时间无效 ＝3：计数器复位☆ 召唤遥信、遥测、BCD 码命令的限定词QOIQOI ＝ 0：未用＝1～19：为配套标准保留＝20：整个站的总召唤（14H ）＝21：召唤第1组（15H ）＝22：召唤第2组（16H ）＝23：召唤第3组（17H ）＝24：召唤第4组（18H ）＝25：召唤第5组（19H ）＝26：召唤第6组（1aH ）＝27：召唤第7组（1bH ）＝28：召唤第8组（1cH ）＝29：召唤第9组（1dH ）＝30：召唤第10组（1eH ）＝31：召唤第11组（1fH）＝32：召唤第12组（20H）＝33：召唤第13组（21H）＝34：召唤第14组（22H）＝35：召唤第15组（23H）＝36：召唤第16组（24H）＝37～63：为配套标准保留＝64～255：为特殊用途保留☆状态和状态变化检出SCDSCD包含2个字节的状态位ST和2个字节的状态变化检出位CD；STn＝0：位序为n位的状态为OFF＝1：位序为n位的状态为ONCDn＝0：位序为n位的状态自上次报告后未检出状态变化＝1：位序为n位的状态自上次报告后检出状态变化应答过程在国家标准中，制订了一套典型的问答式规范，一般来说，以下几个过程将依次出现：1.初始化过程主→子：请求链路状态C_RQ_NA_1子→主：回答链路状态M_RQ_NA_1××××＝0001：链路忙；＝1110：链路服务未工作；＝1011：链路完好；＝1111：链路服务未完成。
主→子：复位远方链路请求C_RL_NA_1子→主：复位远方链路确认M_RL_NA_12.对时过程主→子：时间同步的发送帧C_CS_NA_10～59999ms0～59min0～23h1～7，Day of week 1～31，Day of month 1～12，Months0～99，Years子→主：时间同步的确认帧M_CS_NA_10～59999ms0～59min0～23h1～7，Day of week1～31，Day of month1～12，Months0～99，Years3.总召唤过程主→子：总召唤命令帧C_IC_NA_1子→主：总召唤确认帧M_IC_NA_1子→主：遥测帧M_ME_NA_1传送原因＝1：周期/循环＝2：背景扫描＝5：被请求＝20：响应总召唤＝29：响应分组召唤……＝32：响应分组召唤子 主：单点遥信帧M_SP_NA_1子→主：双点遥信帧M_DP_NA_1传送原因＝1：周期/循环＝2：背景扫描＝5：被请求＝20：响应总召唤＝21：响应分组召唤……＝28：响应分组召唤子→主：总召唤结束帧M_IC_NA_1其中的遥测帧M_ME_NA_1可以用不带品质描述的遥测帧M_ME_ND_1代替，而两种遥信帧也可以状态和状态变位的遥信帧M_PS_NA_1代替，其格式如下：子 主：不带品质描述的遥测帧M_ME_ND_1传送原因与遥测帧M_ME_NA_1的相同子→主：状态和状态变位的遥信帧M_PS_NA_1传送原因与单、双点遥信帧相同以上所述的总召唤过程是国家标准中推荐的应答过程，这是一种非平衡式的传输方式，一问多答；但华中网调的ABB系统采用的纯粹的平衡式的传输方式，即一问一答，具体如下：主→子：总召唤命令帧C_IC_NA_1（同上）子→主：无所请求数据确认帧M_NV_NA_1或回答单个字符E5H主→子：召唤二级用户数据帧C_P2_NA_1子→主：总召唤确认帧M_IC_NA_1主→子：召唤二级用户数据帧C_P2_NA_1子→主：遥测帧M_ME_NA_1（或M_ME_ND_1）主→子：召唤二级用户数据帧C_P2_NA_1子→主：遥信帧M_SP_NA_1（或M_SP_NA_1、M_PS_NA_1）……（直到送完全部遥测遥信数据）4.分组召唤过程南瑞公司的主站系统经常采用依次召唤某组数据的方法得到全数据，过程如下：主→子：召唤某一组数据帧C_IC_NA_1QOI＝21：召唤第1组……＝36：召唤第16组而子站给予的回答则与总召唤时的回答格式相同，只有传送原因字节表示出不同的组号。
