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- 5.1. 单寄存器浓度读取
- 01 03 00 06 00 01 64 0B
- 5.2. 多通道单寄存器浓度读取
- 01 03 20 00 00 04 4F C9
- 5.3. 多寄存器浓度+报警状态读取
- 01 03 00 05 00 03 15 CA
- 5.4. 所有参数读取
- 01 03 00 05 00 0E D4 0F
- 5.1. 单寄存器浓度读取
- 01路: 01 03 00 06 00 01 64 0B 返回:01 03 02 00 00 B8 44
- 5.3. 多寄存器浓度+报警状态读取
- 01路: 01 03 00 05 00 03 15 CA 返回: 01 03 06 00 00 00 00 00 00 21 75
- 02路: 02 03 00 05 00 03 15 F9 返回: 02 03 06 00 00 00 09 00 00 E5 87 02 03 06 00 00 03 E8 00 02 34 34
- 03路: 03 03 00 05 00 03 14 28 返回: 03 03 06 00 00 00 03 00 00 C8 15
- 04路: 04 03 00 05 00 03 15 9F 返回: 04 03 06 00 00 00 03 00 00 EE 25
- 05路: 05 03 00 05 00 03 14 4E 返回:
- 06路: 06 03 00 05 00 03 14 7D 返回:
- 07路: 07 03 00 05 00 03 15 AC 返回:
- 08路: 08 03 00 05 00 03 15 53 返回:
- 5.4. 所有参数读取（用这个轮询）
- 01路: 01 03 00 05 00 0E D4 0F 返回:01 03 1C 00 00 00 00 00 00 45 58 00 00 00 00 00 01 00 FF 00 00 C8 00 00 00 F4 01 00 00 00 00 61 2F
- 02路: 02 03 00 05 00 0E D4 3C 返回:02 03 1C 00 00 00 08 00 00 45 58 00 00 00 00 00 01 00 FF 00 00 00 C8 00 00 01 F4 00 00 00 00 50 C7
- crc计算方式：
- 在线计算 http://www.ip33.com/crc.html
- 选CRC-16/MODBUS
- 算出的两个字节互调即是
- 01路:01 03 00 02 00 01 25 CA 返回:01 03 02 08 24 BF 9F
- 02路:01 03 00 03 00 01 74 0A 返回:01 03 02 08 24 BF 9F
- 03路:01 03 00 04 00 01 74 0A 返回:01 03 02 08 25 7E 5F
- 04路:01 03 00 05 00 01 94 0B 返回:01 03 02 08 26 3E 5E
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