108 Chapter 7 - Parameters Description User Manual
The alarm will be displayed with the massage "EF".
A signalling of the "external fault" condition is available on the digital output as "Extern fault".
Code Name [Code] & Function. Default MIN MAX Unit Variation IPA
P.400 Ext fault mode 0 0 3 470
Phase Loss Detection
P.410 Ph Loss detec en (Phase Loss detection enabling)
The enabling of this function allows to detect the missing of any phase of the input supply.
P.410 = 0 Disabled Phase loss control detection disabled.
P.410 = 1 Enabled Phase loss control detection enabled.
The alarm will be displayed with the message "PH".
A signalling of the "phase loss " condition is available on the digital output as "Alarm state".
Code Name [Code] & Function. Default MIN MAX Unit Variation IPA
P.410 Ph Loss detec en [0] Disable 1 0 1 492
[1] Enable
Voltage Reduction Configuration
When a motor is found to use only partial power during normal running conditions, enabling this function reduces the
motor flux current to save energy coast.
P.420 Volt reduc mode (Voltage reduction mode)
Definition of the mode for the output voltage reduction.
P.420 = 0
The output voltage reduction is always applied.
P.420 = 1
The output voltage reduction is not applied during the ramp, providing in this way the availability of the full
torque up to the achieving of the maximum setup of the V/F ratio.
The voltage reduction will be activated only at constant speed (end of ramp).
P.421 V reduction fact (Voltage reduction factor)
Level of the output voltage, that will be applied on the motor terminals.
It is percentage of the voltage, resulting from the V/F ratio (see figure 7.6.14).
P.422 V fact mult src (Voltage reduction factor multiply source)
The output voltage level reduction, can be linearly regulated through an analog reference signal.
Its regulation will be performed in a range between 10% (setting the input at 0V - 0mA - 4mA) and 100% of the
value setted with P.421 parameter (+/- 10V - 20mA).
The figure below describes this regulation.
NOTE!
The level of voltage reduction, will be applied in accordance to the output voltage value, based on the
characteristic of the V/F ratio.
Example:
P.421 = 30%
V/f motor characteristic = 380V / 50Hz
Motor supply voltage = 380V / 50Hz
The value of P.422 will be the following:
380 -
= 266V
380x30
100
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