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Performance RFC mode
Menu 5
Unidrive SP Advanced User Guide 133
Issue Number: 10 www.controltechniques.com
If Pr 6.09 is set to enable the catch a spinning motor function in open-loop mode or closed-loop vector mode without position feedback (RFC mode)
(Pr 3.24 = 1 or 3) this parameter defines a scaling function used by the algorithm that detects the speed of the motor. It is likely that for smaller motors
the default value of 1.0 is suitable, but for larger motors this parameter may need to be increased. If the value of this parameter is too large the motor
may accelerate from standstill when the drive is enabled. If the value of this parameter is too small the drive will detect the motor speed as zero even
if the motor is spinning.
5.40 Spin start boost
Drive modes Open-loop, Closed-loop vector
Coding
Bit SP FI DE TE VM DP ND RA NC NV PT US RW BU PS
1111
Range Open-loop, Closed-loop vector 0.0 to 10.0
Default Open-loop, Closed-loop vector 1.0
Update rate
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