Siemens SINAMICS G120 Operating Instructions Manual page 15

Table 1- 6 This is how you select the setpoint source for the frequency
Parameters Description
P1000 = 0: No main setpoint
1: MOP setpoint
2: Analog setpoint (factory setting for non-fieldbus-capable inverters)
3: Fixed frequency
4: USS at RS 232
5: USS on RS 485
6: Fieldbus (factory setting for fieldbus-capable inverters)
7: Analog setpoint 2
Table 1- 7 This is how you parameterize the up and down ramps
Parameters Description
P1080 = ... Minimum frequency
0.00 [Hz] factory setting
P1082 = ... Maximum frequency
50.00 [Hz] factory setting
P1120 = ... Rampup time
10.00 [s]
P1121 = ... Rampdown time
10.00 [s]
Table 1- 8 This is how you set the closed-loop type
Parameters Description
P1300 = 2 Extended access
P1300 = ... 0: V/f control with linear characteristic (factory setting)
1: V/f control with FCC
2: V/f control with parabolic characteristic
3: V/f control with programmable characteristic
20: Sensorless vector control
21: Vector control with encoder
22: Torque vector control without encoder
Table 1- 9 This is how you optimize the starting behavior of the V/f control for a high break loose torque and overload
Parameters Description
P0003 = 2 Extended access
P1310 = ... Voltage boost to compensate resistive losses
The voltage boost is effective from standstill up to the rated speed.
The voltage boost continually decreases with increasing speed.
The maximum voltage boost is effective at speed zero and is in V:
Rated motor current (P305) × stator resistance (P350) × P1310 /100.
P1311 = ... Voltage when accelerating
The voltage boost is effective from standstill up to the rated speed.
The voltage boost is independent of the speed.
The voltage boost in V is:
Rated motor current (P305) × stator resistance (P350) × P1311 /100
CU240S and CU240E Control Units, FW 3.2
Operating Instructions, 03/2009, A5E02440075B AA
1.4 Frequently required parameters
Introduction
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