Writing The Modbus Register (Parameter Setting) - Bender ISOMETER isoCHA425HV Manual

Data access via RS-485 interface
Command of the master to the ISOMETER®
In the following example, the master of the ISOMETER® requests the content of register 1003 using address 3.
The register contains the channel description of measuring channel 1.
Byte
Byte 0
Byte 1
Byte 2, 3
Byte 4, 5
Byte 6, 7
Answer of the ISOMETER® to the master
Byte
Byte 0
Byte 1
Byte 2
Byte 3, 4
Byte 7, 8
5.2.2

Writing the Modbus register (parameter setting)

Registers in the device can be modified with function code 0x10 (set multiple registers). Parameter registers
start with address 3000. For the contents of the registers, see table in chapter 5.3.2.1.
The master sends a command to the ISOMETER®
In this example, address 3 is used to set the content of register address 3003 to 2.
Byte
Byte 0
Byte 1
Byte 2, 3
Byte 4, 5
Byte 6
Byte 7, 8
Byte 9, 10
32 isoCHA425HV_D00404_04_M_XXEN/10.2023
Name
ISOMETER® Modbus address
Function code
Start address
Number of registers
CRC16 checksum
Name
ISOMETER® Modbus address
Function code
Number of data bytes
Data
CRC16 checksum
Name
ISOMETER® Modbus address
Function code
Start register
Number of registers
Number of data bytes
Data
CRC16 checksum
Example
0x03
0x03
0x03EB
0x0001
0xF598
Example
0x03
0x03
0x02
0x0047
0x81B6
Example
0x03
0x10
0x0BBB
0x0001
0x02
0x0002
0x9F7A