Operating Manual

IRS31Pro-UMB Operating Manual V10 / 01.2020
G. Lufft Mess- und Regeltechnik GmbH 57
18.5.5 Message Device Identification
The device responds to the identification request with following message (example for SDI-12 device
address ‘0’:
0I!
013Lufft.deIRSxyznnn
x: Metric / US units ( m = metric, u = US )
y: Spot value or average value (a = average, c = spot)
z: Defrosting agent ( n = NaCl, m = MgCl2, c = CaCl2 ) ( optional, currently not yet available)
nnn: Software version
i.e. configured for US units, average, NaCl:
0I!
013Lufft.deIRSumn022
18.5.6 Message Verification
The command verification aV! is used to evaluate status information of the device. The device responds
with
a0004<CR<LF>
to the request, i.e. 4 values are available in the buffers.
The first 3 “measurement values”, transmitted in buffer ‘0’ contain the status information of the
measurement channels.
The status data of the channels are assembled to form “fake measurement values”, where each digit
represents one status. See below for the coding of states. Generally each sensor has two status values,
one for the direct value and another for the measurement value buffer used for the evaluation of the
average, min, and max values.
The last shows the measurement counter.
Buffer ‘0’
Status group1: +nnnn road temperature, road temperature buffer, ext. temp. 1, ext.
temp 1 buffer
Status group 2: +nnnn ext. temp. 2, ext. temp. 2 buffer, saline concentration, saline
concentration buffer
Status group 3: +nnnn water film height, water film height buffer, road condition,
road condition buffer
Measurement value UMB
Channel
min max Unit
measurement counter 20001 0 65520