SUTO S418, Инструкция по эксплуатации

Страница: 18 / 28

9 Sensor signal outputs
9.3 Modbus output
Mode : RTU
Baud rate : 19200
Device address : Last two digits of the serial number
Framing / parity / stop bit : 8, N, 1
Response timeout
: 1 second
Response delay : 0 ms
Inter-frame spacing : 7 char
Remark: Modbus communication settings can be changed by the
service app S4C - FS .
Channel description Resolution Format Length
Modbus
register
address
Flow 0.1 FLOAT 4-byte 6
Consumption 1 UNIT32 4-byte 8
Pressure 0.01 FLOAT 4-byte 2
Remark : The physical units of measurement channels can be
configured using the service APP S4C-FS.
In the response message that the device returns to the master:
•
Function code: 03
•
Byte order (32-bit data): MID-LITTLE-ENDIAN.
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 of byte orders
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
18 S418