ZC2515_编程指导手册V1.1.pdf - 第110页

ZC2515 仪器指令集 106 { 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,0x…

100%1 / 118
ZC2515 仪器指令集
105
3) 仪器每次测量完成，都会发送测量结果指令给上位机。上位机只要接收数据即可。
返回：08 03 08 41 20 18 E7 00 00 00 00 68 BB
返回：08 03 08 41 20 18 DD 00 00 00 00 B0 BE
返回：08 03 08 41 20 18 DD 00 00 00 00 B0 BE
MODBUS
指令详细说明
总线地址和指令地址
1) 总线地址
总线地址就是仪器<系统设置>页面下的总线地址。
2) 指令地址
指令地址就是指令格式中地址高位和地址低位。
数据字节 1~n
如果字节总数为 2，数据字节 1 属于高 8 位，数据字节 2 数据低 8 位，组成 16
位整数；
如果字节总数为 4，数据字节 1 属于 float 最高 8 位，数据字节 4 数据最低 8 位，
数据字节 1 至数据字节 4 组成 float。
如果字节总数为 8，表示 2 个 float，数据字节 1 至数据字节 4 组成第一个 float，
数据字节 5 至数据字节 8 组成第二个 float。
例如十进制数 25.16，转换 16 进制数为 0x41 0xC9 0x47 0xAE，则数据字节 1
为 0x41，数据字节 2 为 0xC9，数据字节 3 为 0x47，数据字节 4 为 0xAE。如果以 4
字节数组存储，则 a[0]=0xAE，a[1]=0x47，a[2]=0xC9，a[3]=0x41。
CRC 低位和 CRC 高位
本仪器 MODBUS 指令 CRC16 校验采用查表法。具体代码如下：
//CRC16 高位字节值表
const U8 Crc16HighTable[] =
{
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,
0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,
0x00,0xC1,0x81,0x40,0x01,0xC0,0x80,0x41,0x01,0xC0,0x80,0x41,0x00,0xC1,0x81,0x40,
};
//CRC16 低位字节值表
const U8 Crc16LowTable[]=
ZC2515 仪器指令集
106
{
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,
};
U16 CalcCrc16Code(char *pbuf, U16 size)
{
U8 crc_high = 0xFF;
U8 crc_low = 0xFF;
U8 crc_index;
U16 crc_code;
while(size--)
{
crc_index = crc_low ^ *pbuf++;
crc_low = crc_high ^ Crc16HighTable[crc_index];
crc_high = Crc16LowTable[crc_index];
}
crc_code = ((crc_high << 8) | crc_low);
return(crc_code);
}
读指令返回格式说明
0
1
2
3
4
5
6
7
8
9
10
11
12
总线
地址
功能
代码
字节
总数
数据
字节
1
数据
字节
2
数据
字节
3
数据
字节
4
数据
字节
5
数据
字节
6
数据
字节
7
数据
字节
8
CRC
低位
CRC
高位
总线地址：仪器总线地址
功能代码：0x03
字节总数：0x08
数据 1~数据 4：被测件的阻值，float16 进制表示。高字节在前，低字节在后。字
节数为 4，数据字节 1 属于 float 最高 8 位，数据字节 4 数据最低 8 位，数据字节 1
至数据字节 4 组成 float。进制转换请参见网站：http://lostphp.com/hexconvert/。如
下图举例所示：
数据 5~数据 8：测量结果的状态，0 表示测量结果值有效。
ZC2515 仪器指令集
107
实例：
返回：08 03 08 41 C2 D7 88 00 00 00 00 39 6D
说明：
数据字节 1 到数据字节 4 为 0x41 0xC2 0xD7 0x88，则数据字节 1 为 0x41，
数据字节 2 为 0xC2，数据字节 3 为 0xD7，数据字节 4 为 0x88。如果以 4 字节
数组存储，则 a[0]=0x88，a[1]=0xD7，a[2]=0xC2，a[3]=0x41。转换成 10 进制
数为 2.435524E+1。