Modbus通信协议

ModbusModbusModbusModbus,ModbusModbusModbus1ModbusModbusRS-232CModemModbusModbus2Modbus31032ASCIIRTUModbusModbusASCII:1...nLRCLRCRTU1...nCRCCRCASCIIRTUModbusMAPModbusPlusModbus1ASCIIModbusASCII8BitASCII1?ASCII0...9A...F?ASCII?1?7?1?12BitLRC()2RTUModbusRTU8Bit4BitASCII?80...9A...F?8?1?8?1?12BitCRC()ModbusASCIIRTUModbus1ASCIIASCII:ASCII3AHASCII0DH,0AH1Modbus0...9,A...F:1LRC122n222ASCII2RTURTU3.5(T1-T2-T3-T4)0...9,A...F3.51.53.5CRCCRCT1-T2-T3-T48Bit8Bitn8Bit16BitT1-T2-T3-T43RTU3ASCII8BitRTU0...247()1...2470Modbus4ASCII8BitsRTU1...255()10000001103H1000001183H500...FFASCIIRTU031000B6ModbusASCIIASCIIASCIILRCLRCRTURTU16Bits(8)CRCCRC7Modbus...ASCII123456712345674.ASCIIRTU12345678123456784.RTUModbusLRCCRC2Modbus11ASCII7RTU8RTU811000101140141152LRCASCIILRCLRCLRC8LRCLRCLRCLRC8BitLRCstaticunsignedcharLRC(auchMsg,usDataLen)unsignedchar*auchMsg;/**/unsignedshortusDataLen;/*LRC*/{unsignedcharuchLRC=0;/*LRC*/while(usDataLen--)/**/uchLRC+=*auchMsg++;/**/return((unsignedchar)(-((char_uchLRC)));}3CRCRTUCRCCRCCRC16CRCCRCCRC11688BitCRCCRC8OR0LSBLSB1LSB0888CRCCRCCRCunsignedshortCRC16(puchMsg,usDataLen)unsignedchar*puchMsg;/*CRC*/unsignedshortusDataLen;/**/{unsignedcharuchCRCHi=0xFF;/*CRC*/unsignedcharuchCRCLo=0xFF;/*CRC*/unsigneduIndex;/*CRC*/while(usDataLen--)/**/{uIndex=uchCRCHi^*puchMsgg++;/*CRC*/uchCRCHi=uchCRCLo^auchCRCHi[uIndex};uchCRCLo=auchCRCLo[uIndex];}return(uchCRCHi8|uchCRCLo);}/*CRC*/staticunsignedcharauchCRCHi[]={0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,3Modbus0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40};/*CRC*/staticcharauchCRCLo[]={0x00,0xC0,0xC1,0x01,0xC3,0x03,0x02,0xC2,0xC6,0x06,0x07,0xC7,0x05,0xC5,0xC4,0x04,0xCC,0x0C,0x0D,0xCD,0x0F,0xCF,0xCE,0x0E,0x0A,0xCA,0xCB,0x0B,0xC9,0x09,0x08,0xC8,0xD8,0x18,0x19,0xD9,0x1B,0xDB,0xDA,0x1A,0x1E,0xDE,0xDF,0x1F,0xDD,0x1D,0x1C,0xDC,0x14,0xD4,0xD5,0x15,0xD7,0x17,0x16,0xD6,0xD2,0x12,0x13,0xD3,0x11,0xD1,0xD0,0x10,0xF0,0x30,0x31,0xF1,0x33,0xF3,0xF2,0x32,0x36,0xF6,0xF7,0x37,0xF5,0x35,0x34,0xF4,0x3C,0xFC,0xFD,0x3D,0xFF,0x3F,0x3E,0xFE,0xFA,0x3A,0x3B,0xFB,0x39,0xF9,0xF8,0x38,0x28,0xE8,0xE9,0x29,0xEB,0x2B,0x2A,0xEA,0xEE,0x2E,0x2F,0xEF,0x2D,0xED,0xEC,0x2C,0xE4,0x24,0x25,0xE5,0x27,0xE7,0xE6,0x26,0x22,0xE2,0xE3,0x23,0xE1,0x21,0x20,0xE0,0xA0,0x60,0x61,0xA1,0x63,0xA3,0xA2,0x62,0x66,0xA6,0xA7,0x67,0xA5,0x65,0x64,0xA4,0x6C,0xAC,0xAD,0x6D,0xAF,0x6F,0x6E,0xAE,0xAA,0x6A,0x6B,0xAB,0x69,0xA9,0xA8,0x68,0x78,0xB8,0xB9,0x79,0xBB,0x7B,0x7A,0xBA,0xBE,0x7E,0x7F,0xBF,0x7D,0xBD,0xBC,0x7C,0xB4,0x74,0x75,0xB5,0x77,0xB7,0xB6,0x76,0x72,0xB2,0xB3,0x73,0xB1,0x71,0x70,0xB0,0x50,0x90,0x91,0x51,0x93,0x53,0x52,0x92,0x96,0x56,0x57,0x97,0x55,0x95,0x94,0x54,0x9C,0x5C,0x5D,0x9D,0x5F,0x9F,0x9E,0x5E,0x5A,0x9A,0x9B,0x5B,0x99,0x59,0x58,0x98,0x88,0x48,0x49,0x89,0x4B,0x8B,0x8A,0x4A,0x4E,0x8E,0x8F,0x4F,0x8D,0x4D,0x4C,0x8C,0x44,0x84,0x85,0x45,0x87,0x47,0x46,0x86,0x82,0x42,0x43,0x83,0x41,0x81,0x80,0x40};ModBus1ModBus1ModBus01ON/OFF)02ON/OFF)0304050607880809484PC1048491112ModBus13184/384484584PC14184/3844845841315161718884MICRO84PC1920584L21584L2264657273119120127128255ModBus247PCPC2ModBus2ModBus0102034Modbus04050608N/A1516171ModBusModBus22PCModBusModBus2ASCIIRTU33ASCIIRTUASCII(7RTU(8ASCII09AF)1178111212LRCCRC(ASCIIFortanPCRTUPCRTU8ASCIIRTU4ASCIIASCIIRTUASCIIRTUASCII1s4RTURTU010300380001XX010324124XX4124166762ModBusCRC-16CRC-16MSBX1616X16+X15+X2+1X16+X15+X2+11100000000000010116MSB2CRC1CRCX16+X15+X2+1CRCCRC2LSB-CRCMSBCRCMSBMSBCRC-16161168161611010000000000001088~168162CRCModBusCRC16CRC16CRC16X16+X15+X2+1160000CRC16X16+X14+X1+10000FFFFHLRCLRCASCII82ASCIILRCLRCLRCCRLFASCII5LRC0280200000010010000000100000000000000000000000000000008+0000100000001011111101015ModbusF5F5PCLRC80800000010000000010000000000000000000000000000100011110101000000006