Siemens ET 757 E Series Instrucciones de operaciones descargar pdf (Pagina 87)

Commissioning and optimization (software)

7.2 Commissioning and optimization of the frequency converter and motor combination

ET 200pro FC

Operating Instructions, 11/2007, A5E01100763B AA

Table 7-4 Settings for P0340

P0340 Meaning

0 No calculation

1 Complete parameterization

2 Calculation of the replacement circuit data

3 Calculation of V/f and the closed-loop vector control

4 Calculation of the controller settings

For complete parameterization (P0340=1), not only the motor and controller parameters are

assigned in advance but also the parameters which are related to the rated motor data

(e.g. torque limit values and reference quantities for interface signals). The List Manual

contains a full list of all parameters depending on P0340. For calculation of the motor and

controller data with P0340 there are various scenarios which can be called up as a function

of the known data.

7.2.3 Motor Data Identification

Description

The Inverter has a measuring technique which is used to determine the motor parameters:

Equivalent circuit diagram (ECD) ➙ P1900 = 2

Measures Equivalent circuit diagram

(ECD) + Magnetizing characteristic

(includes P1900 = 2)

➙ P1900 = 3

For control-related reasons, it is essential that the motor data identification is performed.

Without performing the motor data identification it is only possible to estimate ECD data

using information from the motor rating plate. For example, the stator resistance is extremely

important for the stability of the closed-loop Vector control and for the voltage boost of the V/f

characteristic. The motor data identification routine should be executed, especially if long

feeder cables or if third-party motors are being used.

If the motor data identification routine is being started for the first time, then the following

data is determined, starting from the rating plate data (rated [nominal] data) with P1900 = 2:

● ECD data

● Motor cable resistance

● IGBT on-state voltage and compensation of IGBT gating dead times.

The rating plate data represents the initialization values for the identification. This is the

reason that it is necessary to have the correct input from the rating plate data when

determining the data specified above.

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Siemens ET 757 E Series Instrucciones de operaciones Pagina 87