Parameters
List of Parameters
1-188
© Siemens AG 2007 All Rights Reserved
SINAMICS G120 Control Units CU240S, Edition 05/2007
Description: Performs a motor data identification.
Values: 0: Disabled
2: Identification of all parameters in standstill
3: Ident. of all param. in standstill incl. the saturation curve
Caution: Motor identification should be performed on a cold motor.
However, the identification of the motor data should only be performed if the motor temperature is within 5 °C of the
measured ambient temperature stored in P0625.
If the motor identification is not within the 5 °C limit then the correct functioning of Vector Control (VC, SLVC) can-
not be guaranteed.
The motor rating plate information with respect to the connection of the motor windings (star or delta connection)
must be correct in order to establish the correct equivalent circuit data.
The motor identification calculates this data based on a phase of a star equivalent circuit P0350 - P0360, irrespec-
tive of whether the motor is connected star or delta.
This must be considered when the motor data is inputed directly.
Notice: P1910 can't be changed while the motoridentification is active (P1900 = 2 or 3).
When the identification is finished P1900 and P1910 are set to 0.
Note: Before selecting motor data identification, "Quick commissioning" has to be performed in advance.
Since the cable length of the applications differ in a wide range the preset resistor P0352 is only a rough estimation.
Better results of the motor identification can be achieved by specifing the cable resistor before the start of the motor
identification by measuring/calculating.
Once enabled (P1900 > 0), A0541 generates a warning that the next ON command will initiate measurement of
motor parameters.
Communications - both via USS as well as via the Fieldbus - are interrupted for the time that it takes to make inter-
nal 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.
p1900 Select motor data identification / Sel.mot.data ident
CU240S
CU240S DP
CU240S DP-F
CU240S PN
Access level: 2 P-Group: Motor identification Data type: Unsigned16
Quick comm. YES Active: NO Data set: -
Can be changed: C, T
Min Max Factory setting
0 3 0
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