Operating The Drive Converter Under Load; Adapting The Torque Limits - Siemens SIMOVERT MV Series Commissioning Instructions

As secondary measure, the machine flux can be boosted in the open-loop
controlled operating range. The percentage value by which the flux is increased in
the frequency range −8 % < f < 8 % is entered as percentage at P748
(2.TRV.IMU.PSE). Setting range: 0 - 50 %.
This increase is automatically withdrawn.
As the speed is not measured, but is calculated in a motor model, the signal must
be smoothed and its dynamic characteristics possibly corrected.
Parameters P784 and P785 are only effective for P602 = 1.
P784 (2.TRV.WFA.TGF) smoothing frequency, setting in ms.
P785 (2.TRV.WFA.TGA) setting of the dynamic performance in ms. This is only
necessary for extremely low ramp-up times < 500 ms and is realized, so that no
steps are manifested in the actual value.
4.3.8

Operating the drive converter under load

4.3.8.1

Adapting the torque limits

The source for the motor limit when motoring, is selected using F78.X1 / P366 in
the FP-SWK via F78.X1 / P366 or F78.X2 / P367.
1 Technological setpoint 2
2 Technological setpoint 3
3 Operator panel
9 Fixed 50 % (F72.X1 / P364) (factory setting)
10 Dependent on the speed, can be set via polygon characteristic F76
11 Analog setpoint 1
12 Analog setpoint 2
13 Analog setpoint 3
14 Interface, word 5
15 Interface, word 6
16 Technological setpoint 1
The source for the torque limit when generating is adapted using F88.X1 / P368
and F88.X2 / P369 depending on the setting of the key-actuated switch.
3 Adaption is realized dependent on the speed via the permissible rating of
the pulsed resistor PWg-max (F86.X1)
9 Fixed, 50 % (F72.X1 / P365)
The other values correspond to the sources for the torque limit when motoring. The
motor limits must be set corresponding to the plant situation (motor, load etc.).
The limit values when generating must be entered as negative values (−).
Siemens AG 6SE8004-0BH76
SIMOVERT MV Commissioning Instructions
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