Droop; Co: Integral Output Of N-Ctrl. - Siemens MICROMASTER 440 Parameter Manual

Parameter Description
r1482

CO: Integral output of n-ctrl.

P-Group: CONTROL
Displays integral part of speed controller output.
3.29.2.2

Droop

P1488[3] Droop input source
CStat: CUT
P-Group: CONTROL
Selects source of droop input signal.
With mechanically coupled motors it is very important that an even load distribution is applied to each motor.
The load sharing can be achieved by enabling the droop function on both inverters.
Enable droop
0 ... 1
P1492.D (0)
r1170
Freq. setpoint
r0063
Act. frequency
*) only active, if pre-control is enabled
(P1496 > 0)
1. Droop is applied as a frequency setpoint on each inverter.
The droop increases the slip via the negative feedback of the torque setpoint to the frequency setpoint.
In a steady-state an even load distribution can be achieved if the slip characteristics are identical.
- P1488 > 0
- P1489 > 0
- P1492 = 1
2. Droop can act as a setpoint or limitation for a group of inverters (i.e. master-slave inverters)
By use of the master-slave inverter technique an even load distribution is achieved across the whole
application.
This is accomplished by setting the torque setpoint (r1490) on the master inverter which then controls
the frequency of the master inverter and all connected slave inverters.
- P1488 > 0
- P1489 > 0
- P1492 = 0
Possible Settings:
0 Droop input disabled
1 Torque setpoint
2 Speed controller output
3 Speed controller integral output
Index:
P1488[0] : 1st. Drive data set (DDS)
P1488[1] : 2nd. Drive data set (DDS)
P1488[2] : 3rd. Drive data set (DDS)
Dependency:
Droop scaling (P1489) must be > 0 for droop to be effective.
170
Datatype: Float
Datatype: U16
Active: first confirm
Droop scaling
0.0 ... 0.50
P1489.D ( 0.05)
CO: Droop freq. [Hz]
r1490
0
0
Pre-
control
–
*)
Filter
–
Filter
Min:
Unit: Nm Def:
Max:
Min:
Unit: - Def:
QuickComm.: No Max:
Droop input source
0 ... 3
P1488.D (0)
0
0
1
2
3
r1538
PI
r1538
Speed
r1539
controller
r1539
r1508
MICROMASTER 440
Issue 01/06
Level
-
3
-
-
Level
0
3
0
3
r1482
r1538
Torque
setpoint
r1539
r0079
Parameter List
6SE6400-5BB00-0BP0