Kinetic Buffering (Vdc Min Control) - Siemens SINAMICS G120C Operating Instructions Manual

Advanced commissioning
8.30 Kinetic buffering (Vdc min control)
Suppressing the automatic restart only functions for the setting p1210 = 6, 16 or 26.
Note
Motor starts in spite of an OFF command via the fieldbus
The converter responds with a fault if fieldbus communication is interrupted. For one of the
settings p1210 = 6, 16 or 26, the converter automatically acknowledges the fault and the motor
restarts, even if the higher-level control attempts to send an OFF command to the converter.
• In order to prevent the motor automatically starting when the fieldbus communication fails,
you must enter the fault number of the communication error in parameter p1206.
Parameter
Number
p1206
p1210
p1211
p1212
p1213[0]
p1213[1]
8.30

Kinetic buffering (Vdc min control)

Overview
Kinetic buffering increases the drive availability. The kinetic buffering utilizes the kinetic
energy of the load to buffer line dips and failures. During a line dip, the converter keeps the
motor in the switched-on state for as long as possible. One second is a typical maximum
buffer time.
Requirement
The following requirements must be fulfilled to practically use the "kinetic buffering" function:
• The driven machine has a sufficiently high inertia.
• The application allows a motor to be braked when the line supply fails.
350
Name
Automatic restart faults not active
Automatic restart mode
Automatic restart, start attempts
Automatic restart, wait time start attempts
Automatic restart monitoring time
for restart
Reset automatic restart monitoring time for
startup counter
Operating Instructions, 02/2023, FW V4.7 SP14, A5E34263257B AK
Factory setting
0
0
3
1 s
60 s
0 s
SINAMICS G120C Converters