Automatic Restart (Vector, Infeed) - Siemens SINAMICS S120 Function Manual

Extended Functions

Automatic restart (vector, infeed)

4.6 Automatic restart (vector, infeed)
Description
The automatic restart function is used to automatically restart the drive/drive group
when the line returns after a power failure. In this case, all of the faults present are
automatically acknowledged and the drive is powered-up again. This function is not
only restricted to line supply faults; it can also be used to automatically acknow-
ledge faults and to restart the motor after any fault trips. In order to allow the drive
to be powered-up while the motor shaft is still rotating, the "flying restart" function
should be activated using p1200.
Note
An additional version of the automatic restart function is described in Section 4.20
(single-motor drive comprising the infeed and vector components).
Caution
Automatic restart functions in the vector operator mode and for infeeds with
closed-loop infeed control. After the line supply voltage is connected, Smart Line
Modules 5kW/10kW automatically power themselves up.
Warning
!
If p1210 is set to the value > 1, after the line supply returns, the Line Modules/
motors can automatically start. This is especially critical, if, after longer line supply
failures, motors come to a standstill (zero speed) and it is incorrectly assumed that
they have been powered-down. For this reason, entering the area around the drive
when it is in this condition can cause death, serious injury, or considerable material
damage.
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© Siemens AG 2006 All Rights Reserved
SINAMICS S120 Function Manual, 03/2006 Edition