Power Stack Features; Inverter Application - Siemens MICROMASTER 440 Parameter Manual

Issue 01/06
r0204

Power stack features

P-Group: INVERTER
Displays hardware features of power stack.
Bitfields:
Bit00 DC input voltage
Bit01 RFI filter
Note:
Parameter r0204 = 0 indicates that no power stack has been identified.
P0205

Inverter application

CStat: C
P-Group: INVERTER
Selects inverter application.
The inverter and motor requirements are determined by the speed range and torque requirements of the
load. The relationship between speed and torque for different loads (constant torque loads or variable
torque loads).
Possible Settings:
0 Constant torque
1 Variable torque
Note:
Constant torque (CT):
CT is used if the application needs a constant torque on the whole frequency range. Many loads can be
considered to be constant torque loads. Typical constant torque loads are conveyors, compressors and
positve displacement pumps (see diagram).
Variable torque (VT):
VT is used if the application has a parabolic frequency-torque characteristic like many fans and pumps.
Variable torque allows with the same inverter:
- Higher rated inverter current r0207
- Higher rated inverter power r0206
- Higher threshold for I2t protection
If P0205 is modified in quick commissioning it immediately calculates various motor parameters:
- P0305 Rated motor current
- P0307 Rated motor power
- P0640 Motor overload factor
Torque
Power
Characteristic
Application
MICROMASTER 440 Parameter List
6SE6400-5BB00-0BP0
Datatype: U32
Datatype: U16
Active: first confirm
1
M = const.
M ~
f
P = const.
P
M
f
Winders Hoisting gear
Facing lathes Belt conveyors
Rotary cutting Process machines
machines Involving forming
Rolling mills
Planers
Compressors
Min:
Unit: - Def:
Max:
0 NO
0 NO
Min:
Unit: - Def:
QuickComm.: Yes Max:
M ~ f
2
P ~ f P ~ f
M
M
P
P
f
Calenders with
viscous friction
Eddy-current brakes
Parameter Description
Level
-
3
-
-
1 YES
1 YES
Level
0
3
0
1
2
M ~ f
3
P ~ f
M
P
f f
Pumps
Fans
Centrifuges
45