Siemens 440 - Manual (Page 161)

Issue 01/06 Parameter Description
MICROMASTER 440 Parameter List
6SE6400-5BB00-0BP0
161
P1333[3] Start frequency for FCC Min: 0.0
CStat: CUT Datatype: Float Unit: % Def: 10.0
P-Group: CONTROL Active: Immediately QuickComm.: No Max: 100.0
Defines the FCC starting frequency as a percentage of the rated motor frequency (P0310).
When FCC is activated using P1300 = 1, then as a function of the FCC starting frequency plus hysteresis
and the actual frequency, a changeover is made with a continuous transition between the linear V/f
characteristic (P1300 = 0) and FCC (refer to the diagram).
f
FCC
f
f
FCC+Hys
FCC
V/f
1333 P
100
P0310
f
FCC
⋅ =
( )
% 6 1333 P
100
P0310
f
Hys FCC
+ ⋅ =
+
Sw
itc
h-
ov
er
Index:
P1333[0] : 1st. Drive data set (DDS)
P1333[1] : 2nd. Drive data set (DDS)
P1333[2] : 3rd. Drive data set (DDS)
Notice:
- A value that is excessively low can result in instability.
- The constant voltage boost P1310 is continuously de-activated - essentially the same as when
switching-in FCC.
- Contrary, the voltage boosts P1311 and P1312 remain active over the complete frequency range.
Level
3