
Modbus/TCP 7-3
© 2005 HMS Industrial Networks
AB7607 User manual
Modbus/TCP Addressing
The Anybus-X’s Input (IN) and Output (OUT) areas are set to a maximum size of
508 bytes each. The Status assembly area is 128 bytes. When accessing these
areas, with Modbus commands, the addressing is done according to the following
tables.
Word
Bit Address
000h
0000h
0001h
0002h
0003h
0004h
0005h
0006h
...
000Eh
000Fh
001h
0010h
0011h
0012h
0013h
0014h
0015h
0016h
...
001Eh
001Fh
.....
0FDh
0FD0h
0FD1h
0FD2h
0FD3h
0FD4h
0FD5h
0FD6h
...
0FDEh
0FDFh
Table 7-3 Input Addressing
Word
Bit Address
400h
4000h
4001h
4002h
4003h
4004h
4005h
4006h
...
400Eh
400Fh
401h
4010h
4111h
4012h
4013h
4014h
4015h
4016h
...
401Eh
401Fh
...
4FDh
4FD0h
4FD1h
4FD2h
4FD3h
4FD4h
4FD5h
4FD6h
...
4FDEh
4FDFh
Table 7-4 Output Addressing
Word
Bit Address
100h
1000h
1001h
1002h
1003h
1004h
1005h
1006h
...
100Eh
100Fh
101h
1010h
1111h
1012h
1013h
1014h
1015h
1016h
...
101Eh
101Fh
...
13Fh
13F0h
13F1h
13F2h
13F3h
13F4h
13F5h
13F6h
...
13FEh
13FFh
Table 7-5 Status Addressing