Rev. 0 - 05/11/2020
OPERATING MANUAL
OPERATING MANUAL
EN
EN
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12. OTHER FEATURES
This feature is useful when the speed of the fan is not directly set by the user as fans set in Constant Airflow Asynchronous Emu
-
lation or PID mode.
The alarm is active when a speed threshold is overtaken (5V or 10V depending on the fan model).
12.1 Filter alarm
To activate this feature, the
Holding Register 46
must be set at value 2 and the required Speed Threshold value must be set into
the
Holding Register 55
. The digital output of the driver changes its status (see above figure).
12.2 Out of functioning range alarm
The algorithm can catch the position of the rotor after changing the target speed to 0 and to a new value in short time. If too long
time passed and the fan runs at very low speed, it is not possible to catch the speed: the fan brakes and restarts.
12.3 Flying start (for 3-phase only)
The algorithm can catch the position of the rotor after powering OFF and then ON the fan. If too long time passed and the fan runs
at very low speed it is not possible to catch the speed and the fan brakes and restarts.
12.4 Regeneration (for 3-phase only)
This feature is not available for PFPs.
This feature allows to skip the resonance frequencies of the fan installation.
To activate this feature the Holding Register 32 must be set at the desired Avoid Range
Start and the
Holding Register 33
the desired Avoid Range End.
12.5 Skip speed Range (for 3-phase only)
This function should be avoided when used in close control loops application
or unstable conditions of the fan could occur.
