Siemens 6SR41 series Product User Manual page 132

Application and Operation
6.8 Drive Tuning
The second stage consists of a scan feature during which a preset level of current of varying
frequency is applied to the motor. The control monitors the measured motor flux, and when
the motor flux exceeds a programmable flux threshold, the control assumes that the applied
frequency is equal to the rotating speed of the motor.
Spinning Load should be enabled if any of the following operating modes or features is
selected:
● Fast Bypass
● VFD Startup while motor is spinning (forward or reverse)o Note that the ability to catch
● Synchronous Motor Control (SMC and CSMC)
● Close Loop Vector Control (CLVC)
Note
Spinning Load does not provide instantaneous restart with V/Hz control. With
synchronous motors, spinning load is always instantaneous, i.e., the drive will never go
into a scan mode.
See also
Open Loop Vector Control (OLVC) (Page 110)
Drive Tuning (Page 128)
130
and decelerate a motor spinning in the reverse direction is determined by the drive's
regenerative current capabilities
Operating Instructions, Version AE 12/2009, A5E01454341C
Product User Manual