Request-Response Pair Specification; Table 62 Request-Response Pair Specification - Vaisala PR-23 Series User Manual

PR-23 Series User Guide
The server (DTR) may send the response keys in any order. It will send the mandatory keys
of the specific request, 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
(page 238).
Request and response errors
When the server (DTR) detects an error, it responds with an error message. For more
information see Error message specification (page
an unknown request, or inability to collect data for the mandatory keys of a response.
15.5.2 Request-response pair specification
The list below describes the request-response pairs (query messages), used for data
collection 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 status request must be directed to either sensor A or sensor B, not both.
Table 62 Request-response pair specification
Specification Description
NULL message The null message is included in
the query messages for
debugging purposes as it is
used to check whether the
server is listening. The message
gives a high-level 'ping'
functionality.
Protocol The version query is responded
version with a value representing the
server (DTR) protocol version.
238

Request-response pair specification

240). Error messages can be caused by
Request ID Request data
0x00000000 (none)
0x00000001 (none)
IM-EN-PR23-E
Response key
• IP: IP address
• MAC: Ethernet MAC
address
*Version: integer, the
server protocol version
(currently 3)