Download SED2 Variable Frequency Drives Parameter

Parameter Details (Numeric Listing)
P1233
Duration of DC braking
Min:
Unit:
0
s
Def:
0
Level 3
Max:
250
Details:
Defines duration for which DC injection braking is to be active following an OFF1
command.
Value:
P1233=0: Not active following OFF1.
P1233=1 to 250: Active for the specified duration.
Caution:
Frequent use of long periods of DC braking can cause the motor to overheat.
Note:
The DC braking function causes the motor to stop rapidly by applying a DC
braking current (the current applied also holds the shaft stationary). When the DC
braking signal is applied, the SED2 output pulses are blocked and the DC current
not applied until the motor has been sufficiently demagnetized (demagnetization
time is calculated automatically from motor data).
P1236
Compound braking current
Min:
Unit:
0
%
Def:
0
Max:
Level 3
250
Defines DC level superimposed on AC waveform. The value is entered in %
relative to rated motor current (P0305).
Value:
P1236=0 : Compound braking disabled.
P1236=1 to 250 : Level of DC braking current defined as a % of rated motor
current (P0305).
Dependency:
Active after OFF1/OFF3 command.
Note:
Increasing the value generally improves braking performance; however, if you set
the value too high, an overcurrent trip may result.
P1240
Configuration of Vdc controller
Min:
Unit:
0
-
Def:
1
Max:
Level 3
3
Details:
Enables/disables Vdc controller.
The Vdc controller dynamically controls the DC link voltage to prevent
overvoltage trips on high inertia systems.
Enum:
0
1
2
3
Vdc controller disabled
Vdc-max controller enabled
Reserved
Reserved
Note:
Vdc-max automatically increases ramp-down times to keep the DC link voltage
(r0026) within limits.
Siemens Building Technologies, Inc.
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