Min. Frequency - Siemens MICROMASTER 440 Parameter Manual

Issue 01/06
P1080[3]

Min. frequency

CStat: CUT
P-Group: SETPOINT
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. ADC, 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 (see example).
Furthermore, an undershoot of the actual frequency f_act below min. frequency P1080 is output by the
following signal function.
Index:
P1080[0] : 1st. Drive data set (DDS)
P1080[1] : 2nd. Drive data set (DDS)
P1080[2] : 3rd. Drive data set (DDS)
Example:
ON/OFF
P1080
-P1080
P1080 + P2150
P1080
-P1080
-P1080 - P2150
|f_act| > f_min
r0053
Bit 02
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.
MICROMASTER 440 Parameter List
6SE6400-5BB00-0BP0
Datatype: Float
Active: Immediately
1
0
f_set
f_act
1
0
Parameter Description
Min: 0.00
Unit: Hz Def: 0.00
QuickComm.: Yes Max: 650.00
P2153 = 0
Level
1
t
t
t
t
127