Siemens SINAMICS V20 Operating Instructions Manual page 272

Parameter list
8.2 Parameter list
Parameter Function
P1312[0...2] Starting boost [%]
Applies a constant linear offset (in [%] relative to P0305 (rated motor current)) to active V/f curve (either
linear or quadratic) after an ON command and is active until:
1. ramp output reaches setpoint for the first time respectively
2. setpoint is reduced to less than present ramp output
This is useful for starting loads with high inertia. Setting the starting boost (P1312) too high will cause the
converter to limit the current, which will in turn restrict the output frequency to below the setpoint frequency.
The magnitude of the boost in volt at a frequency of zero is defined as follows:
V_StartBoost,100 = P0305 * Rsadj * (P1312/100)
Where:
Rsadj = stator resistance adjusted for temperature
Rsadj = (r0395/100) * (P0304/(sqrt(3) * P0305)) * P0305 * sqrt(3)
Note: See P1310
r1315 CO: Total boost volt-
age [V]
Displays total value of voltage boost.
P1316[0...2] Boost end frequency
[%]
Defines point at which programmed boost reaches 50 % of its value. This value is expressed in [%] relative
to P0310 (rated motor frequency). The default frequency is defined as follows:
V_Boost,min = 2 * (3 + (153/sqrt(P_Motor))
Dependency: This parameter is influenced by automatic calculations defined by P0340.
Note: The expert user may change this value to alter the shape of the curve, e.g. to increase torque at a particular
frequency.
Default value is depending on converter type and its rating data.
P1320[0...2] Programmable V/f
freq. coord. 1 [Hz]
Sets the frequency of the first point of V/f coordinates (P1320/1321 to P1324/1325) to define V/f characteris-
tic. These parameter pairs can be used to provide correct torque at correct frequency.
Dependen- To set parameter, select P1300 = 3 (V/f with programmable characteristic). The acceleration boost and
cy: starting boost defined in P1311 and P1312 are applied to V/f with programmable characteristic.
Note: Linear interpolation will be applied between the individual data points.
V/f with programmable characteristic (P1300 = 3) has 3 programmable points and 2 non-programmable
points. The 2 non-programmable points are:
Continuous boost P1310 at 0 Hz
•
Rated motor voltage P0304 at rated motor frequency P0310
•
P1321[0...2] Programmable V/f
volt. coord. 1 [V]
See P1320
P1322[0...2] Programmable V/f
freq. coord. 2 [Hz]
See P1320
P1323[0...2] Programmable V/f
volt. coord. 2 [V]
See P1320
270
Range Factory
default
0.0 - 250.0 0.0
- -
0.0 - 100.0 20.0
0.00 - 550.00 0.00
0.0 - 3000.0 0.0
0.00 - 550.00 0.00
0.0 - 3000.0 0.0
Can be Scaling Data set
changed
U, T PERCENT DDS
- - -
U, T PERCENT DDS
T - DDS
U, T - DDS
T - DDS
U, T - DDS
Operating Instructions, 10/2019, A5E34559884-012
Data Acc.
type Level
Float 2
Float 4
Float 3
Float 3
Float 3
Float 3
Float 3
SINAMICS V20 Converter