
76
PBD-51041059
SITRANS LG260 - Operating Instructions
44284-EN-171021
Unit Code
Measurement Unit
111
Cubic Yards
112
Cubic Feet
113
Cubic Inches
10.4 Modbus RTU commands
FC3 Read Holding Register
With this command, any number (1-127) of holding registers can be read out. The start register,
from which the readout should start, and the number of registers are transmitted.
Request:
Parameter
Length
Code/Data
Function Code
1 Byte
0x03
Start Address
2 Bytes
0x0000 to 0xFFFF
Number of Registers
2 Bytes
1 to 127 (0x7D)
Response:
Parameter
Length
Code/Data
Function Code
1 Byte
0x03
Start Address
2 Bytes
2*N
Register Value
N*2 Bytes
Data
FC4 Read Input Register
With this command, any number (1-127) of input registers can be read out. The start register, from
which the readout should start, and the number of registers are transmitted.
Request:
Parameter
Length
Code/Data
Function Code
1 Byte
0x04
Start Address
2 Bytes
0x0000 to 0xFFFF
Number of Registers
N*2 Bytes
1 to 127 (0x7D)
Response:
Parameter
Length
Code/Data
Function Code
1 Byte
0x04
Start Address
2 Bytes
2*N
Register Value
N*2 Bytes
Data