Siemens SED2 VFD NEMA Operating Instructions Manual page 50

SED2 VFD NEMA Type 3R/3RHE Bypass Operating Instructions
Parameter Description
P1202
Motor Current: Flying Start
Defines search current used for
flying start. Value is in % based
on the 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.
P1203
Search Rate: Flying Start
Sets factor by which the output
frequency changes during flying
start to synchronize with the
turning motor. This value,
entered in % relative to the
default time factor, defines the
initial gradient and influences the
time taken to search for the
motor frequency.
The search time is the time taken
to search through all frequencies
between
f_max + 2 x f_slip to 0 Hz.
NOTES:
1. P1203=100% is defined as giving a rate of 2% of f_slip, nom/ms.
2. P1203=200% would result in a rate of frequency change of 1% of f_slip, nom/ms.
3.
A higher value produces a flatter gradient, and thus a longer search time. A lower value has the opposite effect.
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Action
1. Press to enter the SED2
parameter mode and to r0000.
2. Press to advance to
parameter P1202.
3. Press to access the
parameter values level.
4. Press to advance to
desired value.
5. Press to confirm and save
the setting.
1. Press to enter the SED2
parameter mode and to r0000.
2. Press to advance to
parameter P1203.
3. Press to access the
parameter values level.
4. Press to advance to
desired value.
5. Press to confirm and save
the setting.
Setting/Default
Minimum = 10
Default = 100
Maximum = 200
Minimum = 10
Default = 100
Maximum = 200
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