Efficient Networks Siemens Sinamics S120 - Manual (Page 158)

Vector control
4.19 Redundance operation power units
Drive Functions
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Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
(e.g. setpoint channel, sequence control, communication, technology function, etc.) can be
tested in advance without requiring a motor.
For units with outputs of > 75 W it is recommended to test the activation of the power
semiconductors after repairs. To do so, a DC voltage < 40 V is applied to the DC link, and
the possible pulse patterns must be tested by the control software.
The software must allow enabling of the pulses and the output of various frequencies. This is
implemented using V/f control or sensorless closed-loop speed control.
Note
Simulation mode cannot be activated without a power unit. A power unit must be connected
via DRIVE-CLiQ.
4.18.2 Features
● Automatic deactivation with a DC link voltage greater than 40 V (measurement tolerance
± 4 V) with fault message F07826 and immediate pulse inhibit (OFF2)
● Can be activated via parameter p1272
● Deactivation of line contactor activation during simulation mode
● Activation of power semi-conductor with low DC link voltage and with motor (for test
purposes).
● Power unit and closed-loop control can be simulated without a connected motor.
4.18.3 Commissioning
Simulation mode can be activated via p1272 =1. The following prerequisites must be fulfilled:
● Initial commissioning must be complete (default: Standard induction motors).
● The DC link voltage must be below 40 V (observe the tolerance of the DC link voltage
sensing).
4.19 Redundance operation power units
Features
● Redundance for up to 4 chassis power units
● Power unit can be de-activated via parameter (p0125)
● Power unit can be de-activated via binector input (p0895)