Vaisala HUMICAP HMT330 SERIES Guía de usuario descargar pdf (Pagina 204)

User's Guide ______________________________________________________________________

202 _________________________________________________________________ M210566EN-J

Device Identification Objects

HMT330 MODBUS conforms to the extended identification level

defined in the MODBUS Application Protocol Specification V1.1b. Both

stream access and individual access to the objects is supported.

Table 44 HMT330 MODBUS Device Identification

Object Id Object Name Description

0x00 VendorName “Vaisala”

0x01 ProductCode Product code (e.g. “HMT330”)

0x02 MajorMinorVersion Software version (e.g. “5.10”)

0x03 VendorUrl “http://www.vaisala.com/”

0x04 ProductName Product name of the instrument

0x80 SerialNumber Serial number (e.g. “D0710040”)

0x81 CalibrationDate Date of the last calibration

(e.g. “2011-02-07”, empty if not

available)

0x82 CalibrationText Information text of the last calibration

(empty if not available)

Exception Responses

Exception responses from the transmitter are according to the MODBUS

Application Protocol Specification V1.1b.

Table 45 HMT330 MODBUS Exception Responses

Code Name Reason

01 ILLEGAL FUNCTION Unsupported function code

02 ILLEGAL DATA ADDRESS Address out of valid ranges

03 ILLEGAL DATA VALUE Otherwise invalid request

Accessing unavailable (unsupported or temporarily missing) registers

inside ranges specified in Table 38 does not generate an exception.

“Unavailabl

e” 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 196.

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Vaisala HUMICAP HMT330 SERIES Guía de usuario Pagina 204