40 Unidrive M300/HS30 Quick Start Guide
Issue Number: 7
RFC-A:
If this parameter is set to 1, the flux is reduced so that the magnetizing current is equal to the torque
producing current, to optimize copper losses and reduce iron losses in the motor under low load
conditions.
If the drive is to be configured in fixed boost mode (Pr 41 = Fd or SrE) with catch a spinning motor
software enabled, an autotune (see Pr 38 on page 43) must be carried out to measure the motor's
stator resistance beforehand. If a stator resistance is not measured, the drive may trip on OV or
OI.AC while trying to catch a spinning motor.
This parameter selects the function of Digital Input 5 (terminal 14).
33 Catch a Spinning Motor
RW Txt US
OL
Ú
dis (0), Enable (1), Fr.Only (2),
Rv.Only (3)
Ö
dis (0)
RFC-A
Pr 33 Text Function
0 dis Disabled
1 Enable Detect all frequencies
2 Fr.Only Detect positive frequencies only
3 Rv.Only Detect negative frequencies only
34 Digital Input 5 Select
RW Txt US
OL
Ú
Input (0), th.Sct (1), th (2),
th.Notr (3), Fr (4)
Ö
Input (0)
RFC-A
Value Text Function
0 Input Digital input
1th.Sct
Temperature measurement input with short circuit detection
(Resistance <50 Ω )
2th
Temperature measurement input without short circuit detection but
with th trip
3 th.Notr Temperature measurement input with no trips
4 Fr Frequency input
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