Lufft 8371.UA01, Руководство пользователя

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Operating Manual V25/09.2019
Ventus / Ventus-X / V200A
Chapter 20 Appendix
58
20.6.3 Address Configuration
UMB Device-ID and SDI-12 Address are connected, but the different address ranges and the
fact, that UMB ID’s are integer numbers, while SDI-12 addresses are ASCII characters, have to
be considered.
UMB Device ID1 (default) corresponds to SDI-
12 Address ‘0’ (SDI-12 default).
Valid Address Ranges:
UMB SDI-12
1 to 10
‘0’
to
‘9’
18 to 43
‘A’
to
‘Z’
50 to 75
‘a’
to
‘z’
20.6.4 Measurement Data Messages
In the interest of simplified evaluation the assignment of measurement values to data buffers ‘0’
... ‘9’ has been defined unified for all measurement commands. For this reason the responses to
C-requests are restricted to 35 characters, not using the 75 characters permitted for these
requests
Currently buffers ‘0’ bis ‘4’ are in use.
As with M-requests max. 9 values may be transmitted, the minimal base data set has been
assigned to buffers ‘0’ and ‘1’. Buffers ‘2’ to ‘4’, which are available on request by C commands,
contain further measurement values. This definition guaranties the compatibility to loggers
designed according to older versions of the SDI-12 standard.
The complete range of measurement values, as defined for the UMB protocol, is available in the
SDI-12 environment through the additional M and C commands
(aM1! … aM3!, aMC1! …
aMC3!, aC1! … aC3!, aCC1! … aCC3!).
If the measurement value is not available for some reason, e.g. sensor failure, this is indicated
by a value of +999.0 or -999.9. The logger can then evaluate the reason of failure by a aV!
verification request.
The following tables show the measurement values in the sequence they are arranged in the
telegram (see example).
Depending on the configuration of the device the values will be transmitted in metric or US units.
Note: The configured system of units is not indicated in the data messages. The logger may
request this setting with the I-command and adjust the evaluation of the data messages
accordingly
Example: M Request
0M!
00009<CR><LF>
9 Values are available
0D0!
0+13.5+2.5+3.7+2.6<CR><LF>
Air temperature 13,5°C, curr.. wind speed 2,5m/s, max. Wind speed 3,7m/s, avg.wind speed 2,6m/s
0D1!
0+136.4+134.0+100.0+1010.4+1.160<CR><LF>
Curr. wind direction 136,4°, avg. wind direction(vct) 134,0°, Qualityof wind measurement 100%, rel. air presssure (curr)
1010.4 hPa, air density 1.16kg/m³