ultraD Series Water Meter Manual
8
2 bytes
(register address)
2 bytes
(number of register)
The first two bytes are the first address of the register to be read;
The last two bytes are the number of register to be read (up to 22).
1 byte
the number of bytes in data
area
N bytes
specific register data
When the machine responds, the first byte is the number of bytes in data area (not including itself);
The following bytes in data area are the value of the register to be read; the length is determined by the first byte.
CRC Code: two-byte error detection code. Low byte is in front of high byte.
Terminator: after the transfer of the last character, the pause time of 4 character marks the end of the
message.
5.3 Register List
Positive cumulative flow
(integer part)
Positive cumulative flow
(decimal part)
Negative cumulative flow
(integer part)
Negative cumulative flow
(decimal part)
Number of historical data
per hour
Number of historical data
per day