Siemens MICROMASTER 440 - Flying Restart; Flying Start

Parameter Description Issue 01/06
MICROMASTER 440 Parameter List
136 6SE6400-5BB00-0BP0
3.22 Flying restart
P1200 Flying start Min: 0
CStat: CUT Datatype: U16 Unit: - Def: 0
P-Group: FUNC Active: first confirm QuickComm.: No Max: 6
Starts inverter onto a spinning motor by rapidly changing the output frequency of the inverter until the actual
motor speed has been found. Then, the motor runs up to setpoint using the normal ramp time.
V out
I dc
I out
Vn
P1202
fout
t
(f
max
+ 2f
slip nom
)
'motor speed found'
'ramps to set point
with normal ramp'
as per V/f
characteristic
t
t
t
Possible Settings:
0 Flying start disabled
1 Flying start is always active, start in direction of setpoint
2 Flying start is active if power on, fault, OFF2, start in direction of setpoint
3 Flying start is active if fault, OFF2, start in direction of setpoint
4 Flying start is always active, only in direction of setpoint
5 Flying start is active if power on, fault, OFF2, only in direction of setpoint
6 Flying start is active if fault, OFF2, only in direction of setpoint
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.
- 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.
Level
2
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