Operating Manual V8.2/03.2017
Non Invasive Road Sensor
G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany
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Sensor status codes:
Sensor status
Code
OK
0
UNGLTG_KANAL
1
E2_CAL_ERROR
E2_CRC_KAL_ERR
FLASH_CRC_ERR
FLASH_WRITE_ERR
FLASH_FLOAT_ERR
2
MEAS_ERROR
3
MEAS_UNABLE
4
INIT_ERROR
5
VALUE_OVERFLOW
CHANNEL_OVERRANGE
6
VALUE_UNDERFLOW
CHANNEL_UNDERRANGE
7
BUSY
8
other sensor status
9
19.5.7 Message Change of Unit System
The command is used to change the unit system used for the SDI-12 data between metric
and US units. It is implemented as manufacturer specific X command.
Command:
aXU<u/m>!
Response
:
aU<u/m><CR><LF>
u: US units, m: metric units
Example: change to metric units, SDI-
12 address ‘0’
0XUm!
0Um<CR><LF>
19.5.8 Message: Setting of the Threshold
for Road Condition “Damp”
If the water film height is above the threshold
the road condition is identified as “damp”.
Command:
aXM+nnnn!
nnnn:
“damp” threshold in µm water film
Response:
aXM+nnnn<CR><LF>
The response to the attempt of setting of an invalid value (1<threshold<100) is
aXMf<CR><LF>
Example: The
“damp” threshold shall be set to 30µm
0XM+30!
0XM+30<CR><LF>
