Operating Instructions
SED2 Conventional Bypass Option Operating Instructions
32 Siemens Building Technologies, Inc.
Quick Commissioning Procedure, Continued
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
P1080.
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 overvoltage, or
F0003 undervoltage.)
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.
P1121
Ramp-down time
0s to 650s
1. Press
to advance to parameter
P1121.
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 = 30
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 times (P1120 and P1121) slightly shorter than those of the PLC.