User manual

Modbus/TCP 7-3
© 2004 Pyramid Solutions Inc. Publication PUB-AB7603-008
Modbus/TCP Addressing
The BridgeWay’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