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Manual
Combined Wind Sensor ARCO-Modbus
(14581) ARCO-Modbus Manual
6.8 Autoconfi guration
The Modbus sensors from LAMBRECHT meteo off er the possibility of auto-confi guration. This is supported e.g. by the data
logger met[LOG].
For the autoconfi guration, the register addresses of the measured values and sensor data available in the register range
30001 to 35000 are listed as consecutive values in the LAMBRECHT sensors in register range 46001 to 49000. Registers
46001 to 49000 can only be read out as a block! The length of the block or the number of available mapping registers is in
holding register 46000.
Since the addresses from the range 30001 to 35000 apply to all LAMBRECHT sensors, an address from this range is also
representative of a measured value type.
For example, register 30401 always contains the current value of the air temperature. If this register address is not included
in the list in register range 46001 to 49000, the connected Modbus sensor does not supply an air temperature.
If the autoconfi guration is started with the data logger met[LOG], it queries the available mapping registers on each COM
interface in the device address range 1...25. For this purpose, the number of mapping registers is read from register 46000
and the register range from 46001 is read out as a block.
The following table contains the assignment of the confi guration to the individual (possible) instantaneous value registers of
the sensors. Some sensors deliver registers with mean, minimum and maximum values or additional values beyond this speci-
fi cation. Unknown register addresses (or registers that are not required) must therefore be ignored during autoconfi guration.
Register
address Parameter name Unit Factor Description Data
type Func-
tion
code Storage-
type
>16 bit
30001 Wind speed instanta-
neous value
m/s 10 1 decimal place INT 0x04 Big-Endian
WORD
30201 Wind direction instan-
taneous value
° 10 1 decimal place INT 0x04 Big-Endian
WORD
30401 Air temperature in-
stantaneous valuet
°C 10 1 decimal place INT 0x04 Big-Endian
WORD
30601 Humidity instantane-
ous value
% r.F. 10 1 decimal place INT 0x04 Big-Endian
WORD
30701 Dew point instantane-
ous value
°C 10 1 decimal place INT 0x04 Big-Endian
WORD
30801 Air pressure instanta-
neous value
hPa 10 1 decimal place INT 0x04 Big-Endian
WORD
31001 Precipitation amount
total
mm 10 1 decimal place INT 0x04 Big-Endian
WORD
31101 Precipitation amount
total (High-WORD)
mm 1000 3 decimal places
Registers 31101 + 31102 can
only be read out together. (func-
tion code 0x04) uLONG 0x04 Big-Endian
WORD
31102 Precipitation amount
total (Low-WORD)
0x04 Big-Endian
WORD
31201 Precipitation intensity
1-minute (sliding)
mm/
min 1000 = average (1-min.)
3 decimal places
Time base = 1 min.
Meas. rate = 6x per min. INT 0x04 Big-Endian
WORD
31401 Global radiation in-
stantaneous value
W/m² 10 1 decimal place INT 0x04 Big-Endian
WORD
31501 Global radiation
instantaneous values
(High-WORD)
(temperature compen-
sated)
W/m² 100 2 decimal places
Registers 31501 + 31502 can
only be read out together
(function code 0x04) LONG 0x04 Big-Endian
WORD
31502 Global radiation
instantaneous values
(Low-WORD)
(temperature compen-
sated)
0x04 Big-Endian
WORD
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