Additional Parameter Settings; Flying Start - Siemens SED2 VFD NEMA Operating Instructions Manual

Additional Parameter Settings

NOTE:

Flying Start

Parameter Description
P1200
Flying Start
Starts SED2 into a spinning
motor by rapidly changing the
output frequency of the SED2
until the actual motor speed is
found. Then, the motor runs up
to setpoint using the normal
ramp time.
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.
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.
If Display Selection for r0000, parameter P0005=21 (actual frequency), then the
BOP display alternately shows setpoint values and the actual value (0 Hz).
1.
2.
3.
4.
5.
Action
Press to enter the SED2
parameter mode and to r0000.
Press to advance to
parameter P1200.
Press to access the
parameter values level.
Press to advance to
desired setting.
Press to confirm and save
the setting.
Startup Procedures
Setting/Default
Minimum = 0
Default = 0
Maximum = 6
Suggested = 2
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