List of Parameters
Parameters
1-159
© Siemens AG 2007 All Rights Reserved
SINAMICS G120 Control Units CU240S, Edition 05/2007
Description: 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 inverter 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:
Dependency: Starting boost P1312 has no effect during vector operation.
Note: See parameter P1310.
Description: Displays total value of voltage boost (in volts).
Description: 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:
Note: The expert user may change this value to alter the shape of the curve, e.g. to increase torque at a particular fre-
quency.
Default value is depending on inverter type and its rating data.
p1312[0...2] Starting boost / Starting boost
Access level: 2 P-Group: Closed-loop control Data type: Floating Point
Quick comm. NO Active: YES Data set: DDS
Can be changed: U, T
Min Max Factory setting
0.0 [%] 250.0 [%] 0.0 [%]
100
p1312
0350p0305p
V
100,StartBoost
â‹…â‹…=
r1315 CO: Total boost voltage / Total boost V
Access level: 4 P-Group: Closed-loop control Data type: Floating Point
Unit: [V] Data set: -
p1316[0...2] Boost end frequency / Boost end freq.
Access level: 3 P-Group: Closed-loop control Data type: Floating Point
Quick comm. NO Active: YES Data set: DDS
Can be changed: U, T
Min Max Factory setting
0.0 [%] 100.0 [%] 20.0 [%]
)3
P
153
( 2 = f
motor
min Boost
+â‹…
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