Operating Manual V8.2/03.2017
Non Invasive Road Sensor
G. Lufft Mess- und Regeltechnik GmbH, Fellbach, Germany
47
19.5.2 Command Set
For details of the SDI-12 protocol please refer to the above mentioned standard document.
Following commands are available for the NIRS31-UMB:
Note
: The examples in the following sections use italics to print the requests from the logger
(
0V!
)
Command Function
?!
Address search (Wildcard request, one device only on bus!)
a!
Request device active?
aI!
Request device identification
aAb!
Address change to b ( 0 … 9, A …Z, a … z)
aM!
Measurement, basic data set
aMC!
Measurement, basic data set, transmit values with CRC
aC!
Concurrent measurement, basic data set
aCC!
Concurrent measurement, transmit values with CRC
aD0!
Data request buffer 0
aD1!
Data request buffer 1
aD2!
Data request buffer 2
aV!
Command verification: Evaluate sensor, data request with aD0!,
aD1!
aXU<m/u>!
Change the unit system for SDI data
aXM+nnn!
Set device parameters: RC limit “Damp”
aXW+nnn!
Set device parameters: RC limit “Wet”
aXO+nn.n!
Set device parameters: Temperature offset pyrometer
aXE+n.nn!
Set device parameters: Road surface emissivity
aXRr!
Device reset
aXRa!
Device reset with renewal of adjustment
aXRs!
Device reset with reset of service level and renewal of adjustment
