Specifications

Commissioning
Siemens Building Technologies, Inc. 69
Parameter Description Action Setting/ Default
Ramp-down Time
0s to 650s
3.
1. Press
to advance to
parameter P1121.
2. Press
to access the
parameter values level.
3. Press
to advance to
desired value.
4. Press
to confirm and
save the setting.
Site Setting
Default = 30
Typical fan =
120s.
Typical pump =
30s.
P1121
NOTES:
1. Setting the ramp-up time too short can cause the SED2 to trip (F0001
overcurrent, 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 times (P1120
and P1121) slightly shorter than those of the PLC.
End Quick
Commissioning
0 = End without motor
calculation or
factory
reset.
1 = End with motor
calculation and
factory reset
(recommended on
SED2 without
bypass option).
2 = End with motor
calculation and with
I/O reset
(recommended on
SED2 with bypass
option).
3 = End with motor
calculation but
without I/O reset.
1. Press
to advance to
parameter P3900.
2. Press
to access the
parameter values level.
3. Press
to advance to 1.
4. Press to confirm the
setting.
Setting = 1
Default = 0
P3900
NOTES:
1. P0010 must always be set back to 0 before operating the motor.
2. If P3900 is less than 0 on completion of commissioning, P0010 is
automatically set back to 0.