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9.3. Reference
Number
In Modbus communications, a reference number and an address are used to instruct the checkweigher or read the
data.
Data types and reference numbers are listed in the table below.
Data type
Reference number
Description
Output coil
0
Read and write bit data
Used to control DI1 to DI8.
Input status
1
Read only bit data
Used to monitor DI and DO.
Input register
3
Read only Word data
Used to read weighing values and summary data.
Holding register
4
Read and write Word data
Used to change the settings or read the product settings.
9.4. Address
The Modbus communication address is listed in the tables below.
Output coil
Address Name
00001 DI1
00002 DI2
00003 DI3
00004 DI4
00005 DI5
00006 DI6
00007 DI7
00008 DI8
