Parameters
List of Parameters
1-48
© Siemens AG 2007 All Rights Reserved
SINAMICS G120 Control Units CU240S, Edition 05/2007
Values: 0: No calculation
1: Complete parameterization
2: Calculation of equivalent circuit data
3: Calculation of V/f and vector control data
4: Calculation of controller settings only
Note: This parameter is required during commissioning to optimize inverter performance. If there is a large mismatch in
Power ratings of Inverter to Motor it is possible that r0384 and r0386 may not be calculated correct. In these cases
use P1910.
When transferring parameter p0340, the frequency inverter uses its processor to carry-out internal calculations.
Communications - both via USS as well as via the Fieldbus - are interrupted for the time that it takes to make these
calculations.
This can result in the following error messages at the connected SIMATIC S7 control (communications via fieldbus):
• Parameter fault 30
• Drive fault 70
• Drive fault 75
When using STARTER (USS) to commission the drive system, data cannot be entered while these calculations are
being made.
The faults can be acknowledged as soon as the calculations have been completed in the frequency inverter. These
calculations can take up to one minute to complete.
Description: Sets no-load inertia of motor.
Together with P0342 (inertia ratio total/motor) and P1496 (scaling factor acceleration), this value produces the
acceleration torque (r1518), which can be added to any additional torque produced from a BICO source (P1511),
and incorporated in the torque control function.
Note: The result of P0341 * P0342 is included in the speed controller calculation.
P0341 * P0342 (inertia ratio total/motor) = total motor inertia
P1496 (scaling factor acceleration) = 100 % activates acceleration pre-control for the speed controller and calcu-
lates the torque from P0341 (motor inertia) and P0342 (inertia ratio total/motor).
Description: Specifies ratio between total inertia (load + motor) and motor inertia.
Description: Specifies motor weight [kg].
Note: This value is used in the motor thermal model. It is normally calculated automatically from P0340 (motor parame-
ters) but can also be entered manually.
Default value is depending on inverter type and its rating data.
p0341[0...2] Motor inertia [kg*m^2] / Inertia [kg*m^2]
Access level: 3 P-Group: Motor Data type: Floating Point
Quick comm. NO Active: YES Data set: DDS
Can be changed: U, T
Min Max Factory setting
0.00010 1000.00000 0.00180
p0342[0...2] Total/motor inertia ratio / Tot/mot inert.rat.
Access level: 3 P-Group: Motor Data type: Floating Point
Quick comm. NO Active: YES Data set: DDS
Can be changed: U, T
Min Max Factory setting
1.000 400.000 1.000
p0344[0...2] Motor weight / Motor weight
Access level: 3 P-Group: Motor Data type: Floating Point
Quick comm. NO Active: YES Data set: DDS
Can be changed: U, T
Min Max Factory setting
1.0 [kg] 6500.0 [kg] 9.4 [kg]
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