Exception responses, Table 48, Hmt330 modbus exception responses – Vaisala HMT330 User Manual

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User's Guide _______________________________________________________________________

206 __________________________________________________________________ M210566EN-K

Exception Responses

Exception responses from the transmitter are according to the Modbus
Application Protocol Specification V1.1b.

Table 48

HMT330 Modbus Exception Responses

Code

Name

Reason

ILLEGAL FUNCTION

Unsupported function code

ILLEGAL DATA ADDRESS

Address out of valid ranges

ILLEGAL DATA VALUE

Otherwise invalid request

Accessing unavailable (unsupported or temporarily missing) registers
inside ranges specified in Table 41 does not generate an exception.
“Unavailable” value (a quiet NaN for floating point data or zero for
integer data) is returned instead. An exception is generated only for any
access outside the register blocks defined in section Register Map on
page 200.