Siemens SINAMICS PERFECT HARMONY GH180, Function Manual

Page: 96 / 538

Parameter ID Unit Default Min Max Description
Motor torque lim‐
it 2 1210 % 100.0 0.0 300.0 Set the motoring torque limit as a function of
the available motor current. Select via the
SOP.
Regen torque
limit 2 1220 % -0.25 -300.0 0.0 Set the regenerative torque limit as a func‐
tion of rated motor current at full speed. The
limit is allowed to increase inversely with
speed to a maximum of the motoring limit.
Select via the SOP.
Note: For drives with film capacitors (i.e. wa‐
ter-cooled 6SR325), change the setting to -
0.15 %. These cells have less losses and fail‐
ure to make this change could result in an
over voltage trip during deceleration of the
drive.
Motor torque lim‐
it 3 1230 % 100.0 0.0 300.0 Set the motoring torque limit as a function of
the available motor current. Select via the
SOP.
Regen torque
limit 3 1240 % -0.25 -300.0 0.0 Set the regenerative torque limit as a func‐
tion of rated motor current at full speed. The
limit is allowed to increase inversely with
speed to a maximum of the motoring limit.
Select via the SOP.
Note: For drives with film capacitors (i.e. wa‐
ter-cooled 6SR325), change the setting to -
0.15 %. These cells have less losses and fail‐
ure to make this change could result in an
over voltage trip during deceleration of the
drive.
Phase Imbalance
Limit 1244 % 40.0 0.0 100.0 Set the current threshold level for the output
phase current imbalance alarm.
Ground Fault Limit 1245 % 5.0 0.0 100.0 Set the threshold of voltage for the output
ground fault alarm.
Ground Fault Time
Const 1246 sec 0.017 0.001 2.000 Set the filter time constant for averaging the
ground voltage and delaying the response of
the ground fault detection.
Peak Reduction En‐
able* 1248 VFD volt rat‐
ing Select the Peak reduction (third harmonic
injection point) based on VFD or motor volt‐
age rating and neutral connection:
• VFD volt rating (default)
• Motor volt rating
Loss of field level 1141 % 40.0 5.0 50.0 Set the loss of field (I
ds
) level for SM control.
Loss of field time‐
out 1142 sec 10.0 0.5 25.0 Set the loss of field timeout period for SM
control.
* The purpose of the Peak Reduction Enable (1248) parameter is to set the starting point of
third harmonic injection, peak reduction, based on either the default VFD voltage rating or
the motor voltage rating. Refer to the following figure. This is used in motor test stand
applications where the VFD voltage rating may be considerably higher than the motor
voltage rating, to reduce voltage stress on the insulation of a smaller motor.
Parameter Assignment/Addressing
6.3 Options for Motor Menu (1) - first half
Control Manual
94
Operating Manual, A5E50491925A