Siemens CU240B-2 Parameter Manual page 153

p1115 Ramp-function generator selection / RFG selection
Access level: 3
Can be changed: T
Units group: -
Min
0
Description: Sets the ramp-function generator type.
Value: 0:
1:
Note: Another ramp-function generator type can only be selected when the motor is at a standstill.
r1119 CO: Ramp-function generator setpoint at the input / RFG setp at inp
Access level: 3
Can be changed: -
Units group: 3_1
Min
- [rpm]
Description: Displays the setpoint at the input of the ramp-function generator.
Notice: The parameter may be protected as a result of p0922 or p2079 and cannot be changed.
Note: The setpoint is influenced by other functions, e.g. skip (suppressed) speeds, minimum and maximum limits.
p1120[0...n] Ramp-function generator ramp-up time / RFG ramp-up time
Access level: 1
Can be changed: C(1), U, T
Units group: -
Min
0.000 [s]
Description: The ramp-function generator ramps-up the speed setpoint from standstill (setpoint = 0) up to the maximum speed
(p1082) in this time.
Dependency: Refer to: p1082, p1123
Note: The parameter is adapted during the rotating measurement (p1960 > 0). This is the reason that during the rotating
measurement, the motor can accelerate faster than was originally parameterized.
For U/f control and sensorless vector control (see p1300), ramp-up times of 0 s are not expedient. The setting
should be based on the startup times (r0345) of the motor.
p1121[0...n] Ramp-function generator ramp-down time / RFG ramp-down time
PM230 Access level: 1
Can be changed: C(1), U, T
Units group: -
Min
0.000 [s]
Description: The ramp-function generator ramps-down the speed setpoint from the maximum speed (p1082) down to standstill
(setpoint = 0) in this time.
Further, the ramp-down time is always effective for OFF1.
Dependency: The parameter is pre-assigned depending on the size of the power unit.
Refer to: p1082, p1123
Note: For U/f control and sensorless vector control (see p1300), ramp-down times of 0 s are not recommended. The set-
ting should be based on the startup times (r0345) of the motor.
© Siemens AG 2011 All Rights Reserved
SINAMICS G120 Control Units CU240B/E-2 Parameter Manual (LH11), 01/2011
Basic ramp-function generator
Extended ramp-function generator
Calculated: -
Scaling: -
Unit selection: -
Max
1
Calculated: -
Scaling: p2000
Unit selection: p0505
Max
- [rpm]
Calculated: -
Scaling: -
Unit selection: -
Max
999999.000 [s]
Calculated: -
Scaling: -
Unit selection: -
Max
999999.000 [s]
Parameters
List of Parameters
Data type: Integer16
Data set: -
Factory setting
1
Data type: FloatingPoint32
Data set: -
Factory setting
- [rpm]
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
10.000 [s]
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
30.000 [s]
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