This instruction if for memory with 2 register length only, please refer to the list.
Format of command (30) from master
Description of master command
This example will change A02 Scale Factor value to 2.50
slave address: 01(address of this flowmeter)
function code: 30(double Register write instruction)
Address of first reading register: 0001(memory address to write)
Write data: 40 20 00 00 (Change A02 Scale Factor value to 2.50)
CRC: 98 0E (Calculating error correcting code according to CRC algorithm)
Format of flowmeter response(30)
Description of flowmeter response example
Valid command received. It will output the same command back to master.
slave address: 01(address of this flowmeter)
function code: 30(double Register write instruction)
Address of first reading register: 0001(memory address to write)
Write data: 40 20 00 00 (Change A02 Scale Factor value to 2.50)
CRC: 98 0E (Calculating error correcting code according to CRC algorithm)
Register location
Memory definition
Data type
0001
scale factor
float 32
0304
upper limit
float 32
0306
lower limit
float 32
030B
Total Target
float 32
0406
4mA Value
float 32
0408
20mA Value
float 32
040B
4mA Adjust
float 32
040D
20mA Adjust
float 32
Byte#
1
2
3
4
5
6
7
8
9
10
Node ID
Slave Address
Function Code
Memory address to write
Memory address to write
Write data
Write data
Write data
Write data
CRC
CRC
Example
01~FF
01
30
00
01
40
20
00
00
98
0E
Byte#
1
2
3
4
5
6
7
8
9
10
Node ID
Slave Address
Function Code
Memory address to write
Memory address to write
Write data
Write data
Write data
Write data
CRC
CRC
Example 01~FF
01
30
00
01
40
20
00
00
98
0E