Operating Manual

IRS31Pro-UMB Operating Manual V10 / 01.2020
G. Lufft Mess- und Regeltechnik GmbH 46
70 1070
Result message
Road surface condition
FBZ
8 bit 0 … 255
0 Road is completely
dry and free of snow and ice.
1 Road is moist or wet,
or covered with ice or snow
32 Road is wet with
liquid water / aqueous
solution.
64 Road is fully or
partially covered with frozen
water / solid aqueous solution.
65 Road is covered with
snow or slush.
66 Road is covered with
ice (solid, frozen water and
frozen aqueous solution).
67 Frost.
255 Sensor is unable to
determine the road surface
condition due to the prevailing
conditions.
72 1072 Result message
Water film height
WFD
16 bit 0.00…10.00
mm
0.01 mm 0 = 0d = 0000h
10.00 = 1000d = 03E8h
Error ( 65535d = FFFFh=
73 1073 Result message
Thawing material
concentration
TSK
8 bit 0…100 1% 0 = 0d = 00h
100 = 100d = 64h
Error (255d = FFh)
74 1074 Result message
Thawing material per square
meter
TSQ
8 bit 0…100 1g/m
2
0 = 0d = 00h
100 = 100d = 64h
Error (255d = FFh)
75 1075
Result message
Snow film height
SFD
8 bit 0 … 50 mm 1 mm
0 = 0d = 00h
50 = 50d = 32h
Error (255d = FFh)
76 1076 Result message
Ice film height
EFD
16 bit 0.00…2.00
mm
0.01 mm 0 = 0d = 0000h
2.00 = 200d = 00C8h
Error (255d = FFh)
77 1077 Result message
Road grip
GR
8 bit 0.00…1.00 0.01 0.00 = 0d = 00h
1.00 = 100d = 64h
Error (255d = FFh)
79 1079 Result message
Road surface condition for
winter services
FZW
8 bit 0 … 255 0 Dry
16 Moist
32 Wet
48 Extremely wet
64 Icy
129 1129
Result message
Ice percentage
EP
8 bit 0…100 % 1%
0 = 0d = 00h
100 = 100d = 64h
Error (255d = FFh)
18.3 Communication in Binary Protocol
Only one example of an online data request is described in this operating manual. Please refer to the
current version of the UMB Protocol for all commands and the exact mode of operation of the protocol
(available for download at www.lufft.de).
Note: Communication with the sensor takes place in accordance with the master-slave principle, i.e.
there may only be ONE requesting unit on a network.
18.3.1 Framing
The data frame is constructed as follows:
SOH Control character for the start of a frame (01h); 1 byte
<ver> Header version number, e.g.: V 1.0 <ver> = 10h = 16d; 1 byte
1 2 3 – 4 5 – 6 7 8 9 10
11 … (8 + len)
optional
9 + len
10 + len
11 + len
12 + len
SOH <ver> <to> <from> <len> STX <cmd> <verc> <payload> ETX <cs> EOT