这个是MODBUS控制电磁阀的一个程序。其中还有AD采集的部分。对CRC校验用查表的方法。至于怎样把校验的结果拆分成高低位字节，再发送，看程序吧。

-This is a MODBUS control valve procedures. Which are part of AD collection. CRC check on use of look-up table method. As for how to verify the results split into high and low-bit bytes, and then sent to see program it.