Co: Switch-On Level Of Vdc-Max; Dynamic Factor Of Vdc-Max - Siemens MICROMASTER 440 Parameter Manual

Issue 01/06
Caution:
If P1245 increased too much, it may interfere with the drive normal operation.
Note:
Vdc max controller automatically increases ramp-down times to keep the DC-link voltage (r0026) within
limits (r1242).
Vdc min is activated if DC-link voltage falls below the switch on level,P1245. The kinetic energy of the motor
is then used to buffer the DC-link voltage, thus causing deceleration of the drive. If the drive trips F0003
immediately, try increasing the dynamic factor first, P1247. If still tripping F0003 try then increasing the
switch on level, P1245.
r1242

CO: Switch-on level of Vdc-max

P-Group: FUNC
Displays switch-on level of Vdc max controller.
V
DC
r1242
V -controller active
DC_max
1
r0056 Bit14
0
f

Following equation is only valid , if P1254 = 0 :
r1242 = 1.15
otherwise :
r1242 is internally calculated
Note:
Parameter r1242 (switch-in threshold) is determined by each power cycle, when precharging of the DC-link
is finished.
P1243[3]

Dynamic factor of Vdc-max

CStat: CUT
P-Group: FUNC
Defines dynamic factor for DC link controller in [%].
Index:
P1243[0] : 1st. Drive data set (DDS)
P1243[1] : 2nd. Drive data set (DDS)
P1243[2] : 3rd. Drive data set (DDS)
Dependency:
P1243 = 100 % means parameters P1250, P1251 and P1252 (gain, integration time and differential time)
are used as set. Otherwise, these are multiplied by P1243 (dynamic factor of Vdc-max).
Note:
Vdc controller adjustment is calculated automatically from motor and inverter data.
MICROMASTER 440 Parameter List
6SE6400-5BB00-0BP0
Datatype: Float
A0911
⋅ ⋅ ⋅ ⋅
2 V . 1 15 2 P 0210
=
mains
Datatype: U16
Active: Immediately
Min:
Unit: V Def:
Max:
f
act
f
set
Min:
Unit: % Def:
QuickComm.: No Max:
Parameter Description
Level
-
3
-
-
t
t
t
Level
10
3
100
200
149