A&D AD-4971 - Reference Number for Modbus; Address for Modbus

8 Modbus Communication - 8.3 Reference Number for Modbus
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8
8.3.
Reference Number for Modbus
Modbus communication uses a reference number and an address to receive a command and read and write data.
The data types and reference numbers are listed in the tables below.
Table 77 RReference Number
Data type
Reference number
Description
Output coil
0
Read and write bit data. Bits: DI 1 to DI 4.
Input status
1
Read only bit data. Bits: DO 1 to DO 8.
Input register
3
Read only word data. Used to read communication settings and count
data.
Holding register
4
Read and write word data. Used to change the settings and read
each product setting.
8.4.
Address for Modbus
Table 88 OOutput Coil Address
Table 99 IInput Status Address
Address
Name

Address
Name
00001
DI 1
10001
DI 1
00002
DI 2
10002
DI 2
00003
DI 3
10003
DI 3
00004
DI 4
10004
DI 4
00005
DI 5
10033
DI Status 1
00006
DI 6
10034
DI Status 2
00007
DI 7
10035
DI Status 3
00008
DI 8
10036
DI Status 4
10037
DI Status 5
10038
DI Status 6
10039
DI Status 7
10040
DI Status 8
10065
DO 1
10066
DO 2
10067
DO 3
10068
DO 4
10069
DO 5
10070
DO 6
10071
DO 7
10072
DO 8