The Numbers in these two formulas are decimal, The ADDR in the formula is the parameter value of the meter, the range is 0~80, R is the parameter code to read, W is the parameter code to write, K is the parameter values to write. The check code is the remainder of the binary 16 bit integer addition to the above formula, the remainder is 2 bytes, its low byte is in front, and the high byte is follow. The parameter values to be written are represented by a 16-bit binary integer.