Siemens Sinamics G120 Series - p1080[0...2] Min. frequency; Min. frequency

Parameters
List of Parameters
1-128
© Siemens AG 2007 All Rights Reserved
SINAMICS G120 Control Units CU240S, Edition 05/2007
Description: Sets minimum motor frequency [Hz] at which motor will run irrespective of frequency setpoint.
The minimum frequency P1080 represents a masking frequency of 0 Hz for all frequency target value sources e.g.
AI,
MOP,
FF,
USS
with the exception of the JOG target value source (analogous to P1091)
Thus the frequency band +/- P1080 is run through in optimum time by means of the acceleration/deceleration
ramps.
Dwelling in the frequency band is not possible.
Furthermore, an overshoot of the actual frequency f_act upper min. frequency P1080 is output by the signal func-
tion (|f_act| > f_min, see below).
Example:
Note:
Value set here is valid both for clockwise and for anticlockwise rotation.
Under certain conditions (e.g. ramping, current limiting), motor can run below minimum frequency.
p1080[0...2] Min. frequency / Min. frequency
Access level: 1 P-Group: Setpoints Data type: Floating Point
Quick comm. YES Active: YES Data set: DDS
Can be changed: C, U, T
Min Max Factory setting
0.00 [Hz] 650.00 [Hz] 0.00 [Hz]
0 t
1
t
r0053
Bit 02
|f_act| > f_min
p1080
-p1080 - p2150
p1080 + p2150
-p1080
t
p1080
-p1080
0 t
1
ON/OFF
p2153 = 0
f_set
f_act