OBL PRO Series Use And Maintenance Manual page 34

This command is requesting the content of holding registers 40024 to 40025 from
the slave device with address 01.
01 03 0017 0002 740F
01:
03:
0017:
17 hex)
0002:
40025)
740F:
b. Response:
01 03 04 003C 003C 3A2E
01:
03:
04:
bytes)
003C:
003C:
3A2E:
2. Preset Multiple Registers (FC=16)
a. Request
This command is writing the contents of two holding registers 41003 and 41004 to
the slave device with address 01.
01 10 03EA 0002 04 0000 0000 6968
01:
10:
03EA:
0002:
04:
bytes)
0000:
0000:
6968:
b. Response
▪
01 10 03EA 0002 6078
01:
10:
03EA:
▪
0002:
▪
6078:
File: UT-5601
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Slave Address (01 hex)
Function Code (Read holding registers)
The Data Address of the first register requested. (40024 - 40001 =
The total number of registers requested. (read 2 registers 40024 to
CRC (cyclic redundancy check) for error checking.
Slave Address (01 hex)
Function Code (Read holding registers)
The number of data bytes to follow (2 registers x 2 bytes each = 4
The contents of register 40024
The contents of register 40025
The CRC (cyclic redundancy check).
The Slave Address (01 hex)
The Function Code (Preset Multiple Registers)
The Data Address of the first register. (41003 - 40001 = 03EA hex)
The number of registers to write
The number of data bytes to follow (2 registers x 2 bytes each = 4
The value to write to register 41003
The value to write to register 41004
The CRC (cyclic redundancy check) for error checking.
The Slave Address (01 hex)
The Function Code (Preset Multiple Registers)
The Data Address of the first register. (41003 - 40001 = 03EA hex)
The number of registers written.
The CRC (cyclic redundancy check) for error checking.
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