Unidrive M200-201 Quick Start Guide
37
Issue Number: 7
Defines how the motor is controlled when the run signal is removed from the drive.
See the
Control User Guide
for further information.
Open-loop:
Set to 1 to enable Dynamic V to F mode in open-loop mode only.
0:
Fixed linear voltage to frequency ratio (constant torque - standard load)
1:
Voltage to frequency ratio dependant on load current. This gives a higher motor efficiency.
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 41) 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.
31
Stop Mode
RW
Txt
US
OL
Ú
CoASt (0), rP (1), rP.dc I (2),
dc I (3), td.dc I (4), dis (5)
Ö
rP (1)
RFC-A
CoASt (0), rP (1), rP.dc I (2),
dc I (3), td.dc I (4), dis (5), No.rP (6)
Value
Text
Description
0
CoASt
Coast stop
1
rP
Ramp stop
2
rP.dc l
Ramp stop + 1 second dc injection
3
dc I
Injection braking stop with detection of zero speed
4
td.dc I
Timed injection braking stop
5
dis
Disable
6
No.rP
No ramp (RFC-A mode only)
32
Dynamic V To F Select / Flux Optimization Select
RW
Num
US
OL
Ú
0 to 1
Ö
0
RFC-A
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
