Siemens SINAMICS G120 Manual page 145

p1121[0...n] Ramp-function generator ramp-down time / RFG ramp-down time
PM240 Access level: 1
PM250, PM260
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: 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.
p1122[0...n] BI: Bypass ramp-function generator / Bypass RFG
Access level: 4
Can be changed: U, T
Units group: -
Min
-
Description: Sets the signal source for bypassing the ramp generator (ramp-up and ramp-down times = 0).
Caution: If the technology controller is operated in mode p2251 = 0 (technology controller as main speed setpoint), or the
hibernation function is activated, then it is not permissible to disable the interconnection to the relevant status word
(r2349, r2399).
Notice: The parameter may be protected as a result of p0922 or p2079 and cannot be changed.
Note: In the case of sensorless vector control, the ramp-function generator must not be bypassed, other than indirectly by
means of interconnection with r2349 or r2399.
p1123[0...n] Ramp-function generator minimum ramp-up time / RFG t_RU min
Access level: 4
Can be changed: U, T
Units group: -
Min
0.000 [s]
Description: Sets the minimum ramp-up time.
The ramp-up time (p1120) is limited internally to this minimum value.
Dependency: Refer to: p1082
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.
If the maximum speed p1082 changes, p1123 is re-calculated.
p1127[0...n] Ramp-function generator minimum ramp-down time / RFG t_RD min
Access level: 4
Can be changed: U, T
Units group: -
Min
0.000 [s]
Description: Sets the minimum ramp-down time.
The ramp-down time (p1121) is limited internally to this minimum value.
Dependency: Refer to: p1082
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. If the maximum speed p1082 changes, p1123 is re-
calculated.
© Siemens AG 2011 All Rights Reserved
SINAMICS G120 Control Units CU230P-2 Parameter Manual (LH9), 01/2011
Calculated: -
Scaling: -
Unit selection: -
Max
999999.000 [s]
Calculated: -
Scaling: -
Unit selection: -
Max
-
Calculated: p0340 = 1
Scaling: -
Unit selection: -
Max
999999.000 [s]
Calculated: p0340 = 1
Scaling: -
Unit selection: -
Max
999999.000 [s]
Parameters
List of Parameters
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
10.000 [s]
Data type: U32 / Binary
Data set: CDS, p0170
Factory setting
0
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
0.000 [s]
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
0.000 [s]
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