The error occurs when the Harmonic attribute is changed (Tango server). The actual energy value changes and also the limits. However, the setPoints of the Pool device and the Tango server remain as they were.
Workaround: Move the motor (Tango server and Pool device) to the current read-value. Thereby no actual move is involved.
It is planned to create a macro which changes the Harmonic and avoids the inconsistency.