Operating instructions

MM420 Parameter List 04/02
MICROMASTER 420 Parameter List
56 6SE6400-5BA00-0BP0
P1080 Min. frequency Min: 0.00
CStat: CUT Datatype: Float Unit: Hz Def: 0.00
P-Group: SETPOINT Active: Immediately QuickComm. Yes Max: 650.00
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.
0
1
{
Min. frequency
0.00 ... 650.00 [Hz]
P1080.D (0.00)
Hyst. freq. f_hys
0.00 ... 10.00 [Hz]
P2150.D (3.00)
| f_act | <= f_min
f_act
r2197 Bit00
r0053 Bit02
| f_act | <= f_min
Example:
t
P1080
t
0
1
ON/OFF
(f_min)
-P1080
ADC output
r0755
t
P1080
(f_min)
-P1080
f_act
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.
Level:
1