Siemens 440 R0070 CO Act. DC-link voltage, R0071 CO Max. output voltage, R0074 CO Act. modulation

Models: 440

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Issue 01/06

 

 

Parameter Description

 

 

 

 

 

 

r0070

CO: Act. DC-link voltage

 

Min:

-

Level

 

Datatype: Float

Unit: V

Def:

-

3

 

 

 

P-Group: INVERTER

 

Max:

-

 

Displays (unfiltered) DC-link voltage.

Note:

Used for process control purposes (in contrast to r0026 (actual DC-link voltage), which is filtered and is used to display the value on the BOP/AOP).

r0071

CO: Max. output voltage

 

Min:

-

 

 

Datatype: Float

Unit: V

Def:

-

 

P-Group:

CONTROL

 

Max:

-

 

Displays maximum output voltage.

 

 

 

 

V

 

 

 

 

 

r0071

Vmax = f(Vdc,MODmax)

 

 

 

 

Vmax

 

 

 

 

(Inverter)

 

 

 

 

 

P0304

Vout

 

 

 

 

Vn

(Inverter)

 

 

 

 

(Motor)

 

 

 

 

P0310

f

 

fn

 

(Motor)

 

P, Φ

 

Power

Flux

 

~

1

 

f

 

f

Field weakening

Level

3

Dependency:

-The actual maximum output voltage depends on the actual incoming line supply voltage.

-The maximum possible output voltage r0071 of the drive inverter is determined by the DC link voltage r0026 and the maximum modulation depth P1803 in the gating unit.

-The maximum output voltage r0071 is tracked with the DC link voltage so that the highest possible value is always and automatically achieved.

-The output voltage only reaches the calculated maximum value under steady-state conditions at the rated load.

-In the no-load and partial load ranges, lower output voltages r0025 are obtained.

r0072

CO: Act. output voltage

 

Min:

-

 

Datatype: Float

Unit: V

Def:

-

 

P-Group: CONTROL

 

Max:

-

Displays output voltage.

Level

3

r0074

CO: Act. modulation

 

Min:

-

 

Datatype: Float

Unit: %

Def:

-

 

P-Group: CONTROL

 

Max:

-

Level

4

Displays actual modulation index.

The modulation index is defined as ratio between the magnitude of the fundamental component in the inverter phase output voltage and half of the dc-link voltage.

MICROMASTER 440

Parameter List

6SE6400-5BB00-0BP0

39

Page 39
Image 39
Siemens 440 manual R0070 CO Act. DC-link voltage, R0071 CO Max. output voltage, R0072 CO Act. output voltage