Siemens SINAMICS G120 Function Manual page 31

Braking ramp monitoring (p9306 = 1)
The inverter not only monitors the selected speed level (SLS level), but also the braking of
the load, e.g. after switching over to a lower speed level.
Advantages:
● The inverter already detects during braking, as to whether the load speed decreases too
● Generally, the inverter signals when the lower speed level is reached earlier than when
Acceleration monitoring (p9306 = 3)
The inverter only monitors the selected speed level, but not the braking of the load. When
changing over to a lower speed level, the inverter begins to brake the load; however, it only
switches over its monitoring to the lower speed after an adjustable delay time.
Advantage:
● Commissioning is simplified, because instead of monitoring the braking, you only have to
Safety Integrated Function Manual, SINAMICS G120 and G120C
Function Manual, 01/2011, FW 4.4, A5E03052391B AB
slowly.
using the delay time as monitoring method.
parameterize the delay time.
Description
2.5 Safely Limited Speed, SLS
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