Regenerative Operation - Siemens Sinamics S120 Function Manual

Function modules
7.12 Extended stop and retract
7.12.5.3

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. Generator operation of the drive is set using p0888 = 3.
2. The V
3. The monitoring of the DC link voltage for generator operation is activated with p1240 = 2.
4. The permissible lower voltage limit V
5. The infeed detects when the power fails as the DC link voltage drops and this is then
7.12.6 Restrictions for ESR
● Operating several axes in the generator mode
● Motors that are not suitable for generator operation
● ESR and Safety Integrated
420
controller must be parameterized.
dc
signaled as an alarm.
Figure 7-32 DC link voltage setpoint
Only use one speed-controlled axis to buffer the DC link. If you have parameterized
several axes, faults can occur, which undesirably influence one another and therefore the
drive line-up as a whole.
Linear motors (1FN) and torque motors (1FW) require an adequately high DC link voltage
to brake. They are not suitable to buffer the DC link when operating in the generator
mode.
If the Safety Integrated Extended Functions are controlled via PROFIsafe, in the case of
a communication failure, Safety Integrated only permits a response time (p9580/p9380)
of maximum 800 ms. After this time expires, Safety Integrated requests pulse
suppression.
dc_min
of the DC link is set using p1248.
dc_min
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
controller.
Drive functions