Commissioning
5.6 Function commissioning
SINAMICS V20 Inverter
Operating Instructions, 07/2012, A5E03728167
103
5.6.3.16 Setting the dual ramp function
Functionality
The dual ramp function allows the user to parameterize the inverter so that it can switch from
one ramp rate to another when ramping up or down to a setpoint. This may be useful for
delicate loads, where starting to ramp with a fast ramp-up or ramp-down time may cause
damage. The function works as follows:
Ramp up:
● Inverter starts ramp-up using ramp time from P1120
● When f_act > P2157, switch to ramp time from P1060
Ramp down:
● Inverter starts ramp-down using ramp time from P1061
● When f_act < P2159, switch to ramp time from P1121
3
2XWSXWIUHTXHQF\
+]
5DPSXS
WLPH
5DPS
GRZQ
WLPH
WLPHV
21
2))
YHVHWSRLQW
YHVHWSRLQW
-2*UDPSXS
WLPH
-2*UDPS
GRZQWLPH
3+]
3+]
3+]
3+]
3
3
3
3
Note that the dual ramp algorithm uses r2198 bits 1 and 2 to determine (f_act > P2157) and
(f_act < P2159).
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