Siemens Sinamics G120 Series Parameter Manual page 149

p1252[0...2] Differential time Vdc-controller / Diff.time Vdc ctrl
PM240 Access level: 4
Quick comm. NO
Can be changed: C, U, T
Min
0.0 [ms]
Description: Enters differential time constant for Vdc controller.
p1253[0...2] Vdc-controller output limitation / Vdc ctrl outp. lim
Access level: 3
Quick comm. NO
Can be changed: C, U, T
Min
0.00 [Hz]
Description: Limits maximum effect of Vdc max controller.
p1254 Auto detect Vdc switch-on levels / Autodet Vdc ON lev
PM240 Access level: 3
Quick comm. NO
Can be changed: C, T
Min
0
Description: Enables/disables auto-detection of switch-on levels for Vdc max controller.
Values: 0:
1:
p1256[0...2] Reaction of kinetic buffering / Reaction of KIB
PM240 Access level: 3
Quick comm. NO
Can be changed: C, T
Min
0
Description: Enters reaction for kinetic buffering controller (Vdc-min controller).
Depending on the setting selected, the frequency limit defined in P1257 is used to either hold the speed or disable
pulses.
If not enough regeneration is produced, drive may trip with undervoltage.
Values: 0:
1:
2:
Note: P1256 = 0:
Maintain DC-link voltage until mains is returned or drive is tripped with undervoltage.
The frequency is kept above the frequency limit provided in P1257.
P1256 = 1:
Maintain DC-link voltage until mains is returned or drive is tripped with undervoltage or pulses are disabled when
frequency falls below the limit in P1257.
P1256 = 2:
This option ramps down the frequency to standstill even when mains return.
If mains does not return, frequency brought down under the control of vdc-min controller until P1257 limit. Then
pulses are disabled or undervoltage has occurred.
If mains return, then an OFF1 is active until P1257 limit. Then pulses are disabled.
© Siemens AG 2007 All Rights Reserved
SINAMICS G120 Control Units CU240S, Edition 05/2007
Disabled
Enabled
Maintain DC-link until trip
Maintain DC-link until trip / stop
Control stop
P-Group: -
Active: YES
Max
1000.0 [ms]
P-Group: -
Active: YES
Max
600.00 [Hz]
P-Group: -
Active: YES
Max
1
P-Group: -
Active: YES
Max
2
Parameters
List of Parameters
Data type: Floating Point
Data set: DDS
Factory setting
1.0 [ms]
Data type: Floating Point
Data set: DDS
Factory setting
10.00 [Hz]
Data type: Unsigned16
Data set: -
Factory setting
1
Data type: Unsigned16
Data set: DDS
Factory setting
0
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