Siemens SINAMICS G120D Operating Instructions Manual page 270

Appendix
A.3 Parameter
Table A- 7 How to set the ramp-up and ramp-down
Parameter Description
p1080 Minimum speed
0.00 [rpm] factory setting
p1082 Maximum speed
1500.000 [rpm] factory setting
p1120 Ramp-up time
10.00 [s]
p1121 Ramp-down time
10.00 [s]
Table A- 8 This is how you set the closed-loop type
Parameter Description
p1300 0: U/f control with linear characteristic
1: U/f control with linear characteristic and FCC
2: U/f control with parabolic characteristic
3: U/f control with adjustable characteristic
4: U/f control with linear characteristic and ECO
5: U/f control for drives requiring a precise frequency (textile area)
6: U/f control for drives requiring a precise frequency and FCC
7: U/f control with parabolic characteristic and ECO
19: U/f control with independent voltage setpoint
20: Speed control (without encoder)
22: Torque control (without encoder)
Not all Power Modules offer for selection all the listed control modes. The control modes permitted for your device are
offered during the commissioning.
Table A- 9 This is how you optimize the starting behavior of the U/f control for a high break loose torque and overload
Parameter Description
p1310 Voltage boost to compensate ohmic losses
The voltage boost is active from standstill up to the rated speed.
It is at its highest at speed 0 and continually decreases as the speed increases.
Value of the voltage boost at speed 0 in V:
1.732 × rated motor current (p0305) × stator resistance (r0395) × p1310 / 100%
p1311 Voltage boost when accelerating
The voltage boost is effective from standstill up to the rated speed.
It is independent of the speed and has a value in V of:
1.732 × rated motor current (p0305) × stator resistance (p0350) × p1311 / 100%
p1312 Voltage boost when starting
Setting to additionally boost the voltage when starting, however only when accelerating for the first time.
270
Converter with control units CU240D-2
Operating Instructions, 04/2014, FW V4.7, A5E34262100B AA