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FLUO SENS integrated Manual January 2013
10.3 Function-Code 03: Reading up to 16 16bit-
Registers
This protocol reads up to 16 16bit-registers from a connected
device.
The following example reads 2 registers (32bit) from the
addresses 235 and 236.
The connected device was given the MODBUS address 9.
Request Response
Field Name/Value (Hex) Field Name/Value (Hex)
Start Frame Start Frame
Slave Address 09 Slave 09
Function code 03 Function code 03
Start Register Hi 00 Number of Bytes 04
Start Register Lo EB Value Hi (Register 235) 00
Number of Registers Hi 00 Value Lo (Register 235) 00
Number of Registers Lo 02 Value Hi (Register 236) 00
LRC 07 LRC F1
End Frame CRLF End Frame CRLF
10.4 Function-Code 06: Writing of 16 16bit-Registers
This protocol writes a 16bit-register to a connected device.
The following example writes 1 register (16bit) on the address
235.
Request Response
Field Name/Value (Hex) Field Name/Value (Hex)
Start Frame Start Frame
Slave Address 09 Slave Address 09
Function code 06 Function code 06
Start Register Hi 00 Register Address Hi 00
Start Register Lo EB Register Address Lo EB
Value Hi (Register 235) 00 Value Hi 00
Value Lo (Register 235) 00 Value Lo 02
LRC 06 LRC 04
End Frame CRLF End Frame CRLF