SUTO S421, Инструкция по эксплуатации

Страница: 31 / 44

10 Sensor signal outputs
Response message
In the response message that the device returns to the master:
•
Function code: 03
•
Byte order (32-bit data): MID-LITTLE-ENDIAN.
Remarks : To properly decode the 4-byte float and unsigned
integer data in the response message, the master must change the
byte order from MID-LITTLE-ENDIAN to the order that it is using
(LITTLE-ENDIAN or BIG-ENDIAN).
Byte sequencing
Byte order Byte sequencing
(HEX)
Example
MID-LITTLE-ENDIAN
(Read from the device) A B C D 0x 0A 11 42 C5
LITTLE-ENDIAN B A D C 0x 11 0A C5 42
BIG-ENDIAN C D A B 0x 42 C5 0A 11
10.4 M-Bus output
Communication parameters
Primary Address : 1
Secondary Address : 8-digit serial number of the sensor
Manufacturer Code : 0x15C4
M-Bus version : 1
Baud rate : 2400
Response delay (ms) : 7
Response timeout (ms) : 100
Receive timeout (ms) : 500
Value register
M-Bus Addr. Description Data bytes
1 Total consumption 4-byte
2 Flow 4-byte
3 M-Bus status 4-byte
S421 31