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ID:56255768
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页数:33页
时间:2020-06-04
《网络电力仪表M-Dbus.doc》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、网络电力仪表M-Dbus,L645规约应用ModBUS-RTU通讯通讯接口:RS4851、通讯波特率:2400-57600Bps2、起始位:13、数据位:84、校验位:偶校验5、停止位:16、CRC校验7、通讯协议:ModBUS-RTU8、通讯报文:网络电力仪表支持ModBUS-RTU协议中以下报文类型:a)01-读控制输出接点(遥控)状态Ø下行:(例:读遥控状态0-7点)FieldNameExample(Hex)SlaveAddress11Function01StartAddressHi00StartAddressLo00N
2、o.ofPointHi00No.ofPointLo08ErrorCheck(CRC)Ø上行:FieldNameExample(Hex)SlaveAddress11Function01ByteCount01Data(DO0-7)00(位状态:1-合,0-分,DO0对应于第0位)ErrorCheck(CRC)b)02-读开入(遥信)状态Ø下行:(例:读遥信状态0-7点)FieldNameExample(Hex)SlaveAddress11Function02StartAddressHi00StartAddressLo00No.of
3、PointHi00No.ofPointLo08ErrorCheck(CRC)Ø上行:FieldNameExample(Hex)SlaveAddress11Function02ByteCount01Data(DI0-7)00(位状态:1-合,0-分,DI0对应于第0位)ErrorCheck(CRC)b)03-读模拟量(遥测)Ø下行:(例:读模拟量0-7点)FieldNameExample(Hex)SlaveAddress11Function03StartAddressHi00StartAddressLo00No.ofPointH
4、i00No.ofPointLo08ErrorCheck(CRC)Ø上行:FieldNameExample(Hex)SlaveAddress11Function03ByteCount10DataHi(AI0)XXDataLo(AI0)XXDataHi(AI1)XXDataLo(AI1)XXDataHi(AI2)XXDataLo(AI2)XXDataHi(AI3)XXDataLo(AI3)XXDataHi(AI4)XXDataLo(AI4)XXDataHi(AI5)XXDataLo(AI5)XXDataHi(AI6)XXDataL
5、o(AI6)XXDataHi(AI7)XXDataLo(AI7)XXErrorCheck(CRC)a)04-读电度量(遥脉)Ø下行:(例:读电度量0-3点)FieldNameExample(Hex)SlaveAddress11Function04StartAddressHi00StartAddressLo00No.ofPointHi00No.ofPointLo04ErrorCheck(CRC)Ø上行:(每个电度量4个字节)FieldNameExample(Hex)SlaveAddress11Function04ByteCoun
6、t10电度量高字Hi(PI0)XX电度量高字Lo(PI0)XX电度量低字Hi(PI0)XX电度量低字Lo(PI0)XX电度量高字Hi(PI1)XX电度量高字Lo(PI1)XX电度量低字Hi(PI1)XX电度量低字Lo(PI1)XX电度量高字Hi(PI2)XX电度量高字Lo(PI2)XX电度量低字Hi(PI2)XX电度量低字Lo(PI2)XX电度量高字Hi(PI3)XX电度量高字Lo(PI3)XX电度量低字Hi(PI3)XX电度量低字Lo(PI3)XXErrorCheck(CRC)a)05-控制Ø下行:(例:合第0点)Field
7、NameExample(Hex)SlaveAddress11Function05CoilAddressHi00CoilAddressLo00ForceDataHiFFForceDataLo00ErrorCheck(CRC)Ø上行:FieldNameExample(Hex)SlaveAddress11Function05CoilAddressHi00CoilAddressLo00ForceDataHiFFForceDataLo00ErrorCheck(CRC)DL/T645通讯规约通信规约、RS-485标准串行电气接口本协议采用
8、RS-485标准串行电气接口,使用点连接成为可能.RS-485接口的一般性能应符合下列要求.3.1驱动与接收端、耐静电(ESD)±15kV(人体模式)。3.2共模输入电压:-7V~+12V。3.3差模输入电压:大于0.2V3.4驱动输出电压:在负载阻抗54欧姆时,最大5V,最
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