ZWLY-C型智能弯管流量计(热力站用) 通讯协议 一、概述 ZWLY-C型智能弯管流量计上下位机的通讯协议，具体特点如下： １、数据格式：８位数据位、１位停止位、无奇偶校验位 ２、通讯速率：2400bps 3、 地址确认:下位机只有在核对握手字节、地址字节正确无误后,才作出响应. 4、 CRC校验: 保证传输正确. 二.协议格式 ZWLY型智能弯管流量计上下位机数据传输遵循如下数据格式: 上位机取运行数据发送数据字节结构 字节1: 握手字节1 “0x5A”(Z) 字节2: 握手字节2 “0x4C”(L) 字节3: 地址字节 “0xxx”下位机地址，应与下位机 所设地址一致，见“热力站专用二 次表补充说明” 字节4: 命令字节 “0x38” 字节5: 数据长度字节 “0X00” 字节6: CRC校验高字节 字节7: CRC校验低字节 下位机发送运行数据字节结构 当下位机收到上位机取运行数据命令，并且地址与本机所 设地址相符时，向上位机传输运行参数。 字节1: 地址字节 “0xxx”本机所设地址，参见“热力 站专用二次表补充说明” 字节2: 命令字节 “0x38” 字节3: 数据长度字节“0x40” 数据字节4-6: 供水流量数据 数据字节7-9: 回水流量数据 数据字节10-12: 热量数据 数据字节13-15: 供水温度数据 数据字节16-18: 回水温度数据 数据字节19-21: 供水压力数据 数据字节22-24: 回水压力数据 数据字节25-43: 备用数据 数据字节44-51: 供水积累流量数据 数据字节52-59: 回水积累流量数据 数据字节60-67: 积累热量数据 字节68： CRC校验高字节 字节69: CRC校验低字节 三、数据结构: 1） 流量、热量、温度、压力数据结构： typedef struct Data { unsigned char byDecimal; /*小数点位*/ int nFlowrate; /*流量数值*/ }Data; 2) 流量、热量、温度、压力数据翻译: 运行数据的翻译函数如下: float ConvertValue(int nFlowrate,int nDecimal) /*nDeciamal为数据结构中的byDecimal*/ { float fResult; fResult=nFlowrate/10000; if(nDecimal>=0x80) fResult=fResult*-1; nDecimal=nDecimal&0x7f; if (nDecimal>=0x40) nDecimal=(nDecimal&0x3f)*-1; fResult=fResult*pow(10,nDecimal); return fResult; } 例：0x82,0x12,0x34 翻译为 -12.34 0x03,0x54,0x81 翻译为 548.1 3)积累流量、积累热量数据结构: 积累流量数据为8字节16个数码的BCD数，小数点在第8位。 举例:00 00 13 46 25 78 67 23指积累流量为1346.25786723. 积累热量数据为8字节16个数码的BCD数，小数点在第8位。 举例:00 00 13 46 25 78 67 23指积累流量为1346.25786723 四.CRC校验: 算法及码表如下: typedef unsigned int UINT; unsigned char Bccl; unsighed char Bcch; /*CRC校验码表:*/ static unsigned char BccTable[]= { 0x00,0x6f,0xde,0xb1,0xbc,0xd3,0x62,0x0d, 0x78,0x17,0xa6,0xc9,0xc4,0xab,0x1a,0x75, 0xf0,0x9f,0x2e,0x41,0x4c,0x23,0x92,0xfd, 0x88,0xe7,0x56,0x39,0x34,0x5b,0xea,0x85, 0xe0,0x8f,0x3e,0x51,0x5c,0x33,0x82,0xed, 0x98,0xf7,0x46,0x29,0x24,0x4b,0xfa,0x95, 0x10,0x7f,0xce,0xa1,0xac,0xc3,0x72,0x1d, 0x68,0x07,0xb6,0xd9,0xd4,0xbb,0x0a,0x65, 0xc0,0xaf,0x1e,0x71,0x7c,0x13,0xa2,0xcd, 0xb8,0xd7,0x66,0x09,0x04,0x6b,0xda,0xb5, 0x30,0x5f,0xee,0x81,0x8c,0xe3,0x52,0x3d, 0x48,0x27,0x96,0xf9,0xf4,0x9b,0x2a,0x45, 0x20,0x4f,0xfe,0x91,0x9c,0xf3,0x42,0x2d, 0x58,0x37,0x86,0xe9,0xe4,0x8b,0x3a,0x55, 0xd0,0xbf,0x0e,0x61,0x6c,0x03,0xb2,0xdd, 0xa8,0xc7,0x76,0x19,0x14,0x7b,0xca,0xa5, 0x80,0xef,0x5e,0x31,0x3c,0x53,0xe2,0x8d, 0xf8,0x97,0x26,0x49,0x44,0x2b,0x9a,0xf5, 0x70,0x1f,0xae,0xc1,0xcc,0xa3,0x12,0x7d, 0x08,0x67,0xd6,0xb9,0xb4,0xdb,0x6a,0x05, 0x60,0x0f,0xbe,0xd1,0xdc,0xb3,0x02,0x6d, 0x18,0x77,0xc6,0xa9,0xa4,0xcb,0x7a,0x15, 0x90,0xff,0x4e,0x21,0x2c,0x43,0xf2,0x9d, 0xe8,0x87,0x36,0x59,0x54,0x3b,0x8a,0xe5, 0x40,0x2f,0x9e,0xf1,0xfc,0x93,0x22,0x4d, 0x38,0x57,0xe6,0x89,0x84,0xeb,0x5a,0x35, 0xb0,0xdf,0x6e,0x01,0x0c,0x63,0xd2,0xbd, 0xc8,0xa7,0x16,0x79,0x74,0x1b,0xaa,0xc5, 0xa0,0xcf,0x7e,0x11,0x1c,0x73,0xc2,0xad, 0xd8,0xb7,0x06,0x69,0x64,0x0b,0xba,0xd5, 0x50,0x3f,0x8e,0xe1,0xec,0x83,0x32,0x5d, 0x28,0x47,0xf6,0x99,0x94,0xfb,0x4a,0x25, 0x00,0x01,0x02,0x03,0x05,0x04,0x07,0x06, 0x0b,0xa1,0x09,0x08,0x0e,0x0f,0x0c,0x0d, 0x16,0x17,0x14,0x14,0x13,0x12,0x11,0x10, 0x1d,0x1c,0x1f,0x1e,0x18,0x19,0x1a,0x1b, 0x2d,0x2c,0x2f,0x2e,0x28,0x29,0x2a,0x2b, 0x26,0x27,0x24,0x24,0x23,0x22,0x21,0x20, 0x3b,0x31,0x39,0x38,0x3e,0x3f,0x3c,0x3d, 0x30,0x31,0x32,0x33,0x35,0x34,0x37,0x36, 0x5b,0x51,0x59,0x58,0x5e,0x5f,0x5c,0x5d, 0x50,0x51,0x52,0x53,0x55,0x54,0x57,0x56, 0x4b,0x41,0x49,0x48,0x4e,0x4f,0x4c,0x4d, 0x46,0x47,0x44,0x44,0x43,0x42,0x41,0x40, 0x76,0x77,0x74,0x74,0x73,0x72,0x71,0x70, 0x7d,0x7c,0x7f,0x7e,0x78,0x79,0x7a,0x7b, 0x60,0x61,0x62,0x63,0x65,0x64,0x