Product Description XI/ON - Eaton Automation

XI/ON: Gateways for Modbus TCP 5 Implementation of Modbus TCP
Table 12:
Supported service
numbers:
Service response area
2080h 2081h 2082h 2083h 2084h 2085h 20FFh
service
no.
result service
code
After the execution of a request, the registers service-no., service
code and index/addr in the response area contain a copy of the
values in the request area.
The register result shows whether the execution was successful or
not.
The register data-reg-count contains the number of data registers
(0 to 122).
The optional Data area can contain, depending on the service, the
requested data.
Supported service numbers:
index/
addr
dataregcount
optional data
(0 to 122 registers)
Note
The service no. is thus used for a simple handshake on the application
level. The application increases the service no. with every request.
The service is blocked, until the service number in the request
area matches the service number in the response area.
Service code Meaning
0×0000 no function
0×0003 indirect reading of registers
0×0010 indirect writing of registers
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