IRS31Pro-UMB
Operating Manual V10 / 01.2020
G. Lufft Mess- und Regeltechnik GmbH
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11 IRS31-UMB Compatibility mode
The compatibility mode to the IRS31-UMB allows:
the addressing of the sensor with the class ID of an IRS31-UMB
the query of measurement channels of an IRS31-UMB
the query of IRS31 encoded road conditions
11.1 Important notes for using Sensor in compatibility mode
When an IRS31Pro-UMB is set to IRS31-UMB compatibility mode, you have to add an IRS31-UMB to
your measurement setup to configure or test the sensor.
When a firmware update should be carried out on an IRS31-UMB, make sure that the sensor is not an
IRS31Pro-UMB in the IRS31-UMB compatibility mode.
It is possible to carry out a firmware update of an IRS31Pro-UMB in the IRS31-UMB compatibility
mode directly (without switching off the IRS31-UMB compatibility mode first).
If an IRS31-UMB firmware is programmed to the IRS31Pro-UMB Sensor, the adjustment data of the
sensor is lost, and the sensor must be adjusted new at the factory.
11.2 Configuration possibilities
With the option "IRS31 compatibility mode", the compatibility mode to IRS31-UMB can be activated and
deactivated.
Figure 20: Sensor settings for IRS31-UMB compatibility mode
After the activation of this function and storing the profile on the sensor, the sensor can be addressed or
tested only with the class ID of an IRS31-UMB (the class-ID for the road sensor IRS31-UMB is 1).
When configuring a measurement station with IRS31-UMB sensors, please make sure that the
activation of the compatibility mode of an IRS31Pro-UMB doesn’t cause double addressing (if
necessary change the ID).
With the option "Number of samples for Average" the number of measurements that are used to generate
the moving average can be configured (Factory setting: 6, Setting Range: 1…20).
Setting this number to 1 deactivates the moving average.
"Limit (°C) for critical roadstates" is relevant for the determination of the road condition states.
