Operating Instructions

List of Parameters

Parameters

1-63

SINAMICS G120 Control Units CU230P-2 Parameter Manual (LH9), 06/2011

Description: Displays the rated motor starting time. This time corresponds to the time from standstill up to reaching the motor

rated speed and the acceleration with motor rated torque (r0333).

Dependency: Refer to: r0313, r0333, p0341, p0342

Description: Sets the excitation build-up time of the motor.

This involves the delay time between enabling the pulses and enabling the ramp-function generator. The induction

motor is magnetized during this time.

Caution: If there is insufficient magnetization under load or if the acceleration rate is too high, then an induction motor can

stall (refer to the note).

Note: The parameter is calculated using p0340 = 1, 3.

For induction motors, the result depends on the rotor time constant (r0384). If this time is excessively reduced, this

can result in an inadequate magnetizing of the induction motor. This is the case if the current limit is reached while

building up magnetizing. For induction motors, the parameter cannot be set to 0 s (internal limit: 0.1 * r0384).

For permanent-magnet synchronous motors and vector control, the value depends on the stator time constant

(r0386). Here, it defines the time to establish the current for encoderless operation immediately after the pulses

have been enabled.

Description: Sets the de-magnetizing time (for induction motors) after the inverter pulses have been canceled.

The inverter pulses cannot be switched in (enabled) within this delay time.

Note: The parameter is calculated using p0340 = 1, 3.

For induction motors, the result depends on the rotor time constant (r0384).

if this time is shortened too much, then this can result in an inadequate de-magnetizing of the induction motor and

in an overcurrent condition when the pulses are subsequently enabled (only when the flying restart function is acti-

vated and the motor is rotating).

r0345[0...n] Nominal motor starting time / Mot t_start_rated

Access level: 3 Calculated: - Data type: FloatingPoint32

Can be changed: - Scaling: - Data set: MDS

Units group: - Unit selection: -

Min Max Factory setting

- [s] - [s] - [s]

p0346[0...n] Motor excitation build-up time / Mot t_excitation

Access level: 3 Calculated: p0340 = 1,3 Data type: FloatingPoint32

Can be changed: C(3), U, T Scaling: - Data set: MDS

Units group: - Unit selection: -

Min Max Factory setting

0.000 [s] 20.000 [s] 0.000 [s]

p0347[0...n] Motor de-excitation time / Mot t_de-excitat.

Access level: 3 Calculated: p0340 = 1,3 Data type: FloatingPoint32

Can be changed: C(3), U, T Scaling: - Data set: MDS

Units group: - Unit selection: -

Min Max Factory setting

0.000 [s] 20.000 [s] 0.000 [s]