Why can't I read the temperature from a UST-3 module on the MP Bus?

FAQ #101194

When using the "Belimo MP Bus" FBox library 2.5.303 or older the temperature value from Pt1000 / Ni1000 sensors aren't read correctly.

There is the same problem with PG5 2.0 until library $2.6.104.

Symptom
If one or more UST 3 modules are connected to the MP bus the states of the digital I/Os are transmitted correctly but the temperature of the sensor isn't transmitted (the FBox always shows the value 0). There might be some communication errors (FBox LED may be green or red)!

Reason
This symptom is caused by an error in the FBox.

Solution
PG5 1.4: Use the Belimo library 2.5.304 or newer which corrects this problem and correctly reads temperature values from UTS3 modules.
PG5 2.0: Use the Belimo library $2.6.151 or newer which corrects this problem and correctly reads temperature values from UTS3 modules.

The according FBox library can be found on the support site in the section "Product information" --> "Software" --> "PG5" --> "FBox Libraries".

Why can't I read the temperature from a UST-3 module on the MP Bus?

FAQ #101194

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