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Example 9 - Restore values from memory

Task:​

A connected device temporarily sends 0km instead of the last odometer reading during the boot process. This deviation should not be recorded in the measurement data.

Solution:​

$'CALC.ZSG_KM_VALUE' = dLatch($'MVB.ZSG_KM_VALUE' < 100.0, $'MVB.ZSG_KM_VALUE', {storage:'lastValid_km_value'});

Functions used:​

Explanation:​

  • dLatch(hold, value) lets the value "pass" with hold=false and saves it internally - here also persistently by specifying the storage. As soon as hold=true, the last saved value is passed on. This happens when the connected device is started, as the mileage falls below 100.