
TUF-2000F User Manual
21
For example, reading the registers from REG0001 to REG0010 in the unit #1 (ultrasonic flow
meter) under the MODBUS-RTU format, the command could be as following
01 03 00 00 00 0A C5 CD
(
hex
)
Unit Function start REG Numbers of REGs Check-sum
While under the MODBUS-ASCII format, the command could be
:01030000000AF2(CR and LF)
Details about the standard MODBUS protocol will not be studied in this manual; please the
users find them on other related materials.
By default, the RS232/RS485 will setup with 9600,none,8,1(9600bd
,
none parity
,
8 data bits
,
1 stop bit)
5.1.1 MODBUS REGISTERS TABLE
MODBUS REGISTERS TABLE for TUF-2000F
(
please take notice the difference with the water meter MODBUS table
)
REGISTER NUMBER
VARIABLE
NAME
FORMAT
NOTE
0001-0002
2
Flow Rate
REAL4
Unit: m
3
/h
0003-0004
2
Energy Flow Rate
REAL4
Unit: GJ/h
0005-0006
2
Velocity
REAL4
Unit: m/s
0007-0008
2
Fluid sound speed
REAL4
Unit: m/s
0009-0010 2
Positive
accumulator
LONG
Unit is selected by
M31, and depends
on totalizer
multiplier
0011-0012
2
Positive decimal fraction
REAL4
Same unit as the
integer part
0013-0014 2
Negative
accumulator
LONG
Long is a signed
4-byte integer,
lower byte first
0015-0016
2
Negative decimal fraction
REAL4
REAL4 is a format
of Singular
IEEE-754 number,
also called FLOAT
0017-0018
2
Positive energy accumulator
LONG