Vaisala PR-23 Series User Manual

The server (DTR) may send the response keys in any order. It will send the mandatory keys
of the specific r
equest, but it may omit any other keys. The server may also send keys that
are not specified in this document, but the client (computer) may ignore them.
Mandatory keys are marked with an asterisk in R
equest-response pair specification
(page 238).
Request and response errors
W
hen the server (DTR) detects an error, it responds with an error message. For more
information see Error message specification (page 240). Error messages can be caused by
an unknown request, or inability to collect data for the mandatory keys of a response.
15.5.2 Request-response pair specifica
tion
The list below describes the request-response pairs (query messages), used for data
c
ollection through Ethernet. Mandatory response keys are preceded by an asterisk (*).
When multiple request data options are available, only one can be used at a time. Each
sensor s
tatus request must be directed to either sensor A or sensor B, not both.
Table 62 Request-response pair specifica
tion
Specification Description Request ID Request data Response key
NULL message The null message is included in
the query mes
sages for
debugging purposes as it is
used to check whether the
server is listening. The message
gives a high-level ’ping’
functionality.
0x00000000 (none) • IP: IP address
• MAC: Ethernet MAC
address
Protocol
v
ersion
The version query is responded
with a value representing the
server (DTR) protocol version.
0x00000001 (none) *Version: integer, the
server protocol version
(currently 3)
PR-23 Series User Guide
IM-EN-PR23-E
238

Vaisala PR-23 Series Specifications

General

Brand	Vaisala
Model	PR-23 Series
Category	Measuring Instruments
Language	English