Issue 01/06

Parameter Description

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

 

Min:

-

 

Datatype: Float

Unit: V

Def:

-

 

P-Group: FUNC

 

Max:

-

Displays switch-on level of Vdc max controller.

VDC

r1242

t

VDC_max -controller active

r0056 Bit14 1

A0911

t

 

0

f

 

 

 

 

 

f act

 

 

f set

 

 

t

Level

3

Following equation is only valid , if P1254 = 0 :

r1242 = 1.15 2 Vmains= 1.15 2 P0210

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

 

Min:

10

CStat:

CUT

Datatype: U16

Unit: %

Def:

100

P-Group:

FUNC

Active: Immediately

QuickComm.: No

Max:

200

Defines dynamic factor for DC link controller in [%].

Index:

Level

3

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

149

Page 149
Image 149
Siemens 440 manual R1242 CO Switch-on level of Vdc-max, P12433 Dynamic factor of Vdc-max, 149