MODBUS COMMUNICATION PROTOCOLS
The parameters of the instrument that can be read or programmed through the communication interfaces
available on the instrument, according to the hardware setup, are listed in the following table.
The registers of the R type are those readable while those of the W type are those writable.
In the case of the Modbus TCP protocol, the device address (“Unit Identifier” field) must always be FFh.
If a fieldbus (different from Modbus) is used, only the R or R/W registers will be present in the input area and
only the W or R/W registers will be present in the output area. The registers have a size of 16 bits.
Modbus
Address
Holding Register
R/W
Note
0001
Status Register
R
See the relevant table
0002
Gross weight (MSW)
R
Value INT. - Most significant word
0003
Gross weight (LSW)
R
Value INT. - Less significant word
0004
Net weight (MSW)
R
Value INT. - Most significant word
0005
Net weight (LSW)
R
Value INT. - Less significant word
0006
Peak (MSW)
R
Value INT. - Most significant word
0007
Peak (LSW)
R
Value INT. - Less significant word
0008
Digital inputs
R
See the relevant table.
0009
Digital outputs
R
0051
Weight 1 status
R
See the relevant table
0052
Weight 1 (MSW)
R
Value INT. - Most significant word
0053
Weight 1 (LSW)
R
Value INT. - Less significant word
…
…
…
…
0072
Weight 8 status
R
See the relevant table
0073
Weight 8 (MSW)
R
Value INT. - Most significant word
0074
Weight 8 (LSW)
R
Value INT. - Less significant word
0101
Net measure weight (MSW)
R
Value INT. - Most significant word
0102
Net measure weight (LSW)
R
Value INT. - Less significant word
0103
Measure code (MSW)
R
Value INT. - Most significant word
0104
Measure code (LSW)
R
Value INT. - Less significant word
0201
Set-Point 1 (MSW)
R/W
Value INT. - Most significant word
0202
Set-Point 1 (LSW)
R/W
Value INT. - Less significant word
0203
Set-Point 2 (MSW)
R/W
Value INT. - Most significant word
0204
Set-Point 2 (LSW)
R/W
Value INT. - Less significant word
0501
Data Register (MSW)
W
Value INT. - Most significant word (See the relevant table)
0502
Data Register (LSW)
W
Value INT. Less significant word (See the relevant table)
0503
Command Register
W
See the relevant table
1001
Standby function
R/W
Value INT.
1002
Keyboard block function
R/W
See the relevant table.
1003
Password function
R/W
Value INT.
1004
Peak function
R/W
See match on page 10
1005
Datalogger function
R/W
See match on page 10
1006
Datalogger Trigger
R/W
See match on page 10
1007
Datalogger frequency
R/W
See match on page 10
