Siemens 125-3208 operating instructions Additional Parameter Settings, Flying Start, r0000

Startup Procedures

Additional Parameter Settings

NOTE: If Display Selection for r0000, parameter P0005 = 21 (actual frequency), then the BOP display alternately shows setpoint values and the actual value (0 Hz).

Flying Start

Parameter		Description			Action	Setting/
						Default
P1200	Flying Start		1.	Press	to enter the SED2	Minimum = 0
	Starts SED2 into a spinning			parameter mode and to display		Default = 0
				r0000.
	motor by rapidly changing the
	output frequency of the SED2					Maximum = 6
	until the actual motor speed is		2.	Press	to advance to
	found. Then, the motor runs up					Suggested = 2
				parameter P1200.
	to setpoint using the normal
	ramp time.
	0	= Flying start disabled.	3.	Press	to access the
				parameter values level.
	1	= Flying start is always active,
	start in direction of setpoint.
	2	= Flying start is active, if power	4.	Press	to advance to
	on, fault, OFF2, start in direction			desired setting.
	of setpoint.
	3	= Flying start is active if fault,	5.	Press	to confirm and save
	OFF2, start in direction of
	setpoint.			the setting.
	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.

NOTES:

1. Flying start is useful for motors with high inertia loads.

2. Settings 1 through 3 search in both directions. Settings 4 through 6 search only in the direction of the setpoint.

3. Flying start must be used in cases where the motor may still be turning (such as after a brief input power break) or can be driven by the load. Otherwise, overcurrent trips occur.

4. If the SED2 faults on F0002 (overvoltage) on a start command, flying start may have to be optimized by reducing the values in P1203 and P1202.

Siemens Building Technologies, Inc. 31