PFlow Industries D116 User Manual

Revision: 3.0.3
Slave Address Operation
Function Code
1 byte 1 byte
0x01~0xF7 0x03
The slave returns the data frame format:
Slave Address Read Operation
Function Code
1 byte 1 byte
0x01~0xF7 0x03
N*＝data register number
The range of flow meter addresses
1 to 247 (Hexadecimal: 0x01
example, decimal number "11" displayed on Menu 46 means the address of the flow meter in the MODBUS
protocol is 0x0B.
The CRC Verify Code adopts CRC-16-IBM
gained by the cyclic redundancy algorithm
method. Low byte of the verify code is at the beginning while the high
byte is at the end.
For example, to read the address 1 (0x01) in
unit(m3/h), namely reads 40005 and
40006 registers data,
0x01 0x03
Flowmeter Address Function Code
Flowmeter returned data is (assuming
the current flow=1.234567m3/h)
0x01 0x03
Flowmeter Address Function Code
The four bytes 3F 9E 06 51 is in the
IEEE754 format single precision floating point form of 1.2345678.
Pay attention to the data storage
order of the above example.
used directly to input the required data
in the corresponding variable address,
beginning, such as the above example
1.2345678 m/s
9.3.2.3 Error Check
The flowmeter
only returns one error code 0x02 which means data first address
For example, to read address 1 (0x01
) of the flowmeter 40002 register data
considers it to be invalid data, and send
s the following command:
0x01 0x03
Flowmeter Address Function Code
Flowmeter returned error code:
0x01 0x83
Flowmeter Address Error Code
Error
9.3.2.4 MODBUS
Register Address List
The flowmeter MODBUS Register has a
read register and
Read Register Address List (use
0x03 performance code to
D116
Series Ultrasonic Flowmeter
First Address Register Register Number
2 bytes 2 bytes
0x0000~0xFFFF 0x0000~0x7D
Number of Data
Bytes
Data Bytes
Verif
1 byte N*x2 byte
2xN* N*x2
CRC(Verify)
1 to 247 (Hexadecimal: 0x01
～0xF7 ), and can be
checked in the Menu 46. For
example, decimal number "11" displayed on Menu 46 means the address of the flow meter in the MODBUS
(polynomial is X
16
+X
15
+X
2
+1, shield character is 0x
A00
method. Low byte of the verify code is at the beginning while the high
the RTU mode, if the
instantaneous flow rate uses hour as
40006 registers data,
the read command is as follows:
0x00 0x04 0x00 0x02
0x85 0xCA
Register Address Register Number CRC
Verify Code
the current flow=1.234567m3/h)
0x04 0x06 0x51 0x3F 0x9E
0x3B 0x32
Data Bytes Data(1.2345678) CRC
Verify Code
IEEE754 format single precision floating point form of 1.2345678.
order of the above example.
Using C language to explain
the data
in the corresponding variable address,
the low byte
will be put
1.2345678 m/s
, 3F 9E 06 51 data stored in order as 06 51
3F 9E
only returns one error code 0x02 which means data first address
in error.
) of the flowmeter 40002 register data
in the RTU
mode, the
s the following command:
0x00 0x01 0x00 0x01
0xD5 0xCA
Register Address Register Number CRC
Verify Code
0x02 0xC0 0xF1
Error
Extended Code CRC Verify Code
Register Address List
read register and
a single write register.
0x03 performance code to
read)
Series Ultrasonic Flowmeter
Page 44 of 53
Verify Code
2 bytes
CRC(Verify)
Verif
y Code
2 bytes
CRC(Verify)
checked in the Menu 46. For
example, decimal number "11" displayed on Menu 46 means the address of the flow meter in the MODBUS
A00
1) which is
method. Low byte of the verify code is at the beginning while the high
instantaneous flow rate uses hour as
a
0x85 0xCA
Verify Code
0x3B 0x32
Verify Code
IEEE754 format single precision floating point form of 1.2345678.
the data
, pointers can be
will be put
at the
3F 9E
.
mode, the
flowmeter
0xD5 0xCA
Verify Code

PFlow Industries D116 Specifications

General

Brand	PFlow Industries
Model	D116
Category	Measuring Instruments
Language	English