Siemens SINAMICS V20

Parameter list
8.2 Parameter list
SINAMICS V20 Converter
Operating Instructions, 10/2019, A5E34559884-012
259
Parameter
Function
Range
Factory
default
Can be
changed
Scaling
Data
set
Data
type
Acc.
Level
P1200
Flying start
0 - 6
0
U, T
-
-
U16
2
Starts converter onto a rotating motor by rapidly changing the output frequency of the converter until the
actual motor speed has been found. Then, the motor runs up to setpoint using the normal ramp time.
0
Flying start disabled
1
Flying start always active; searches in both directions
2
Flying start active after power on, fault, OFF2; searches in both directions
3
Flying start active after fault, OFF2; searches in both directions
4
Flying start always active; searches in direction of setpoint only
5 Flying start active after power on, fault, OFF2; searches in direction of setpoint
only
6
Flying start active after fault, OFF2; searches in direction of setpoint only
Notice:
Flying start must be used in cases where the motor may still be turning (e.g. after a short mains break) or
can be driven by the load. Otherwise, overcurrent trips will occur.
Note:
Useful for motors with high inertia loads. Settings 1 to 3 search in both directions. Settings 4 to 6 search
only in direction of setpoint.
P1202[0...2]
Motor-current: flying start
[%]
10 - 200 100 U, T - DDS U16 3
Defines search current used for flying start. Value is in [%] based on rated motor current (P0305).
Note:
Reducing the search current may improve performance for flying start if the inertia of the system is not
very high. However, search current settings in P1202 that are below 30% (and sometimes other settings
in P1202 and P1203) may cause motor speed to be found prematurely or too late, which can result in F1
or F2 trips.
P1203[0...2]
Search rate: flying start
[%]
10 - 500 100 U, T - DDS U16 3
Sets factor (in V/f mode only) by which the output frequency changes during flying start to synchronize
with turning motor. This value is entered in [%]. It defines the reciprocal initial gradient in the search se-
quence. P1203 influences the time taken to search for the motor frequency.
Example:
For a motor with 50 Hz, 1350 rpm, 100 % would produce a maximum search time of 600 ms.
Note:
A higher value produces a flatter gradient and thus a longer search time. A lower value has the opposite
effect.
r1204
Status word: flying start
V/f
- - - - - U16 4
Bit parameter for checking and monitoring states during search.
Bit
Signal name
1 signal
0 signal
00
Current applied
Yes
No
01
Current could not be applied
Yes
No
02
Voltage reduced
Yes
No
03
Slope-filter started
Yes
No
04
Current less threshold
Yes
No
05
Current-minimum
Yes
No
07
Speed could not be found
Yes
No