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p3520[0...3]
CI: Infeed power pre-control / INF pre-control P
A_INF
Can be changed: U, T
Data type: Unsigned32 / FloatingPoint32
P-Group: Closed-loop control
Not for motor type: -
Min
-
Description:
Sets the signal source for power pre-control.
Dependency:
Refer to: p3521
Note:
Closed-loop control of the DC link voltage is improved by pre-controlling the power required for the other modules.
A non-normalized quantity is expected so that the various power reference values (r2004) of the drive objects do
not have to be taken into account. The scaling factors are used to adapt the scaling (p3521).
p3521[0...3]
Infeed pre-control power scaling / INF prectrl P scal
A_INF
Can be changed: U, T
Data type: Floating Point
P-Group: Closed-loop control
Not for motor type: -
Min
-100000.00000 [%]
Description:
Sets the scaling factor for the power pre-control.
Dependency:
Refer to: p3520
p3530
Infeed current limit motoring / INF I_limit mot
A_INF
Can be changed: U, T
Data type: Floating Point
P-Group: Closed-loop control
Not for motor type: -
Min
1.00 [Arms]
Description:
Sets the motoring limit for the active line current.
The currently effective current limit is displayed in r0067[0].
Dependency:
Refer to: r0067, p3532
Caution:
If this limit is selected lower than the maximum current permissible for the power unit (r0067), the infeed can no
longer provide its full controlled power.
Operating faults of the infeed can occur due to the resulting DC link undervoltage.
Notice:
For self-commutated infeeds, the DC link voltage decreases if more power is drawn from the DC link by the con-
nected load than can be supplied by the line because of the power unit maximum current or a limit in p3530.
If the DC link voltage decreases down to the rectified value, then the complete current - necessary to cover the
required active power - flows, uncontrolled into the rectifier circuit via the diodes.
This is the reason that, for physical reasons, the value in p3530 cannot act as current limit that is always main-
tained.
The value forms a current threshold from which point onwards the DC link energy is used as buffer for brief power
fluctuations.
© Siemens AG 2007 All Rights Reserved
SINAMICS S List Manual (LH1), 07/2007
Calculated: -
Dynamic index: -
Units group: -
Max
-
Calculated: -
Dynamic index: -
Units group: -
Max
100000.00000 [%]
Calculated: -
Dynamic index: -
Units group: 6_2
Max
100000.00 [Arms]
Parameters
List of parameters
Access level: 2
Func. diagram: -
Unit selection: -
Expert list: 1
Factory setting
0
Access level: 2
Func. diagram: -
Unit selection: -
Expert list: 1
Factory setting
100.00000 [%]
Access level: 3
Func. diagram: 8940
Unit selection: p0505
Expert list: 1
Factory setting
10000.00 [Arms]
1-713
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