Siemens 440 manual Flying restart, P1200 Flying start, 136

Parameter Description Issue 01/06

3.22Flying restart

P1200	Flying start				Min:	0
	CStat:	CUT	Datatype: U16	Unit: -	Def:	0
	P-Group:	FUNC	Active: first confirm	QuickComm.: No	Max:	6

Level

2

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.

(fmax + 2fslip nom)

'ramps to set point

	with normal ramp'
fout	t
P1202
I out	t
I dc	t
Vn	as per V/f
	characteristic
V out	t

'motor speed found'

Possible Settings:

0Flying start disabled

1Flying start is always active, start in direction of setpoint

2Flying start is active if power on, fault, OFF2, start in direction of setpoint

3Flying start is active if fault, OFF2, start in direction of setpoint

4Flying start is always active, only in direction of setpoint

5Flying start is active if power on, fault, OFF2, only in direction of setpoint

6Flying 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.

136	MICROMASTER 440 Parameter List
	6SE6400-5BB00-0BP0