MU300 Rev1.0 Oct20
Page 49 of 54
Annotations:
1.
(cr) indicates ENTER, its ASCII code value is ODH. (If) indicates changing a line and its ASCII
code value is OAH.
2.
“d” indicates 0~9 digits and 0 is expressed by + 0.0 00.
3.
“d” indicates 0~9 digits and the integral part has no decimal point.
4.
dddddddd indicates the electronic serial number of the machine.
5.
Character P could be added before every basic command, it indicates the feedback data
has CRC check. The check sum is obtained through binary addition, which is a cumsum
binary system taking the least 8-bit binary data.
For example: Feedback information RT(cr)(lf): +10m3(cr)(lf)(corresponding binary
data are 2BH, 31H, 32H, 33H, 34H, 35H, 36H, 37H, 45H, 2BH, 30H, 6DH, 33H, 20H, 0DH,
0AH ) sum data returned =2BH + 31H + 32H+ 33H + 34H + 35H+ 36H + 37H+45H + 2BH +
30H + 6DH + 33H + 20H = 2F7, and the least 8-bit binary is F7.
Therefore, data of command PRT(cr)(lf) is + 12 0m3!F7(cr)(lf), "!" as for the
delimiter, the first part is the character for summation and the second part is an 1-bit check
code.
6.
Use of W prefix: W+digit string address code+basic command, the digit string value range is
0~255, divided by 13 (0DH ENTER),10(0AH changing a line). If you want to access to the
transient flow velocity of No. 123 flowmeter, you could send command W123DV (cr) (If),
the corresponding binary codes are 57H, 31H, 32H, 33H, 44H, 56H, 0DH and 0AH; only the
meters with the same network address and command could have data feedbacks.
7.
W and P commands could be combined for use, for example, , which means the
network address it reads is the total value of No. 123 flowmeter, its feedback data are
accumulated and checked.
