86
16.4 Modbus Addressing Table for I3N Units
To access I3N registers, a Modbus Master must be configured with the appropriate register type and
offset. This is usually accomplished with one of two methods:
1. The first method uses
Traditional Modbus References
, in which the high digit represents the register
type, and the lower digits represent the register offset (starting with Register 1 for each type). Since only
four register types can be represented in this manner, I3N Modbus Function Blocks pack several I3N
register types into each Modbus register type. Starting addresses of each I3N register type are shown in
the
Traditional Modbus Reference
column of the table.
2. The second method requires the Modbus Master to be configured with a specific
Modbus Command
and
Modbus Offset.
The supported Modbus commands and the associated offsets are also illustrated in
Table 16.1.
Table 16.1 – Modbus Master Mapping
I3N
Reference
Maximum
Range
Trad.
Modbus Ref
(5 Digits)
Expanded
Modbus Ref.
(6 Digits)
Modbus Commands
Modbus
Offset
%I1
2048
10001
010001
Read Input Status (2)
0
%IG1
64
13001
013001
3000
%S1
13
14001
014001
4000
%K1
0
15001
015001
5000
%Q1
2048
00001
000001
Read Coil Status (1)
Force Coil (5)
Force Multiple Coils (15)
0
%M1
2048
03001
003001
3000
%T1
2048
06001
006001
6000
%QG1
64
09001
009001
9000
%AI1
512
30001
030001
Read Input Register (4)
0
%AIG1
32
33001
033001
3000
%SR1
200
34001
034001
4000
%AQ1
512
40001
040001
Read Holding Register (3)
Load Register (6)
Load Multiple Registers (16)
0
%R1
2488
40513
040513
512
%R1
2048
43001
043001
3000
%AQG1
32
46001
046001
6000
%R1
4096
--
410001
10000
Содержание i3N Series
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