Siemens SED2 VFD Electronic Bypass Option 125-3208 - Manual (Page 37)

Startup Procedures
Siemens Building Technologies, Inc. 29
Parameter Description Action
Setting/
Default
P1082 Maximum Motor Frequency
0 Hz to 650 Hz
Maximum motor frequency at
which the motor will run
regardless of the frequency
setpoint. This value applies to
both clockwise and
counterclockwise rotation.
1. Press to advance to
parameter P1082.
2. Press to access the
parameter values level.
3. Press to advance it desired
value.
4. Press to confirm and save
the setting.
Site Setting
Default = 50 or
60
(Default is
determined by
the setting of
the motor
frequency and
unit of
measurement
DIP switches.)
NOTE:
This value is limited internally to 200 Hz or five times the rated motor frequency (P0305). When P1300 is
greater than or equal to 20 (control mode = vector control), the value displays via r0209 (maximum
frequency).
P1120 Ramp-up Time
0s to 650s
1. Press to advance to
parameter P1120.
2. Press to access the
parameter values level.
3. Press to advance it desired
value.
4. Press to confirm and save
the setting.
Site Setting
Default = 10
Typical fan =
120s
Typical pump =
30s
NOTES:
1. Setting the ramp-up time too short can cause the SED2 to trip (F0001 over current, F0002 over voltage,
or F0003 under voltage).
2. If using an external frequency setpoint with set ramp rates (such as from a PLC), achieve optimum
SED2 performance by setting ramp time (P1120 and P1121) slightly shorter than those of the PLC.