Regenerative Operation - Siemens SINAMICS S120 Function Manual

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7.11 Extended stop and retract

Regenerative operation

In the case of a fault, the objective is to buffer the DC link until all of the drives connected to

the DC link and enabled by ESR have reached their configured final position. To achieve

this, a suitable drive in the drive line-up, for example a spindle drive, is braked in generator

operation. The DC-link voltage is then monitored by the V

Configuring the "Generator operation" response

1. Set the generator operation of the drive with the parameter setting p0888 = 3.

2. Parameterize the V

3. Activate the monitoring of the DC-link voltage for the generator operation with the

4. Set the permissible lower voltage limit V

parameter setting p1240 = 2.

The infeed detects when the power fails as the DC-link voltage drops and this is then

signaled as an alarm.

DC-link voltage setpoint

of the DC link via parameter p1248.

Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3

Drive functions