Siemens SINAMICS V20 Operating Instructions Manual page 257

Parameter Function
r1119 CO: Freq. setpoint be-
fore RFG [Hz]
Displays frequency setpoint at the input to the ramp function generator after modification by other func-
tions, e.g.:
P1110 BI: Inhibit neg. freq. setpoint,
•
P1091 - P1094 skip frequencies,
•
P1080 min. frequency,
•
P1082 max. frequency,
•
This value is available filtered (r0020) and unfiltered (r1119).
P1120[0...2] Ramp-up time [s]
Time taken for motor to accelerate from standstill up to maximum motor frequency (P1082) when no
rounding is used. Setting the ramp-up time too short can cause the converter to trip (overcurrent F1).
Dependency: Rounding times (P1130 - P1133), rounding type (P1134), and ramp-up time scaling factor (P1138) will
also have influence on the ramp.
See also P3350, P3353.
Notice: Ramp times will be used as follows:
P1060/P1061 : JOG mode is active
•
P1120/P1121 : Normal mode (ON/OFF) is active
•
P1060/P1061 : Normal mode (ON/OFF) and P1124 is active
•
Set ramp-up time = ramp-up time scaling factor (P1138) x ramp-up time (P1120).
Note: If an external frequency setpoint with set ramp rates is used (e.g. from a PLC), the best way to achieve
optimum converter performance is to set ramp times in P1120 and P1121 slightly shorter than those of the
PLC. Changes to P1120 will be immediately effective. If the SuperTorque function is enabled, the con-
verter will initially ramp using the value in P3353.
P1121[0...2] Ramp-down time [s]
Time taken for motor to decelerate from maximum motor frequency (P1082) down to standstill when no
rounding is used.
Dependency: Ramp-down time scaling factor (P1139) will also have influence on the ramp.
See also P3350, P3353.
Notice: Setting the ramp-down time too short can cause the converter to trip (overcurrent F1/overvoltage F2).
Ramp times will be used as follows:
P1060/P1061 : JOG mode is active
•
P1120/P1121 : Normal mode (ON/OFF) is active
•
P1060/P1061 : Normal mode (ON/OFF) and P1124 is active
•
Set ramp-down time = ramp-down time scaling factor (P1139) x ramp-down time (P1121).
Note: Changes to P1121 will be immediately effective.
See P1120
SINAMICS V20 Converter
Operating Instructions, 10/2019, A5E34559884-012
Range Factory
default
- -
0.00 - 650.00 10.00
0.00 - 650.00 10.00
Can be Scaling Data
changed set
- - -
C, U, T - DDS
C, U, T - DDS
Parameter list
8.2 Parameter list
Data Acc.
type Level
Float 3
Float 1
Float 1
255