Appendix B _________________________________________________________ Modbus Reference
VAISALA ________________________________________________________________________ 97
Table 43 HMW90 Modbus Device Identification
Transmitter model (for example, “HMW95”)
Software version (for example, “1.0.0”)
“http://www.vaisala.com/”
Serial number (e.g. “H0810040”)
Date of the last calibration (for example,
“2014-09-11”, empty if not available)
Information text of the last calibration
(empty if not available)
Table 44 HMW90 Modbus Exception Responses
Unsupported function code
Address out of valid ranges
Otherwise invalid request