Operating Instructions

Chapter 4 - Parameters and Menu Structure
Parameters (M3)
56 | 187
Siemens Industry, Inc.
Siemens BT300 HVAC Drive
DPD01809
Smart Infrastructure
2019-05-29
Table 30: Ramp and Brakes Settings.
Structure
Parameter
Unit
Min
Max
Default
ID
Description
P3.4.1
Ramp 1 Shape
s
0
10
0
500
S-curve time ramp 1.
P3.4.2
Accel Time 1
s
0.1
3000
20
103
Defines the time required to
increase output freq from 0 to
Max Frequency (P3.3.1).
P3.4.3
Decel Time 1
s
0.1
3000
20
104
Defines the time required to
decrease output freq from Max
Frequency (P3.3.1) to 0
frequency.
P3.4.4
Ramp 2 Shape
s
0
10
0
501
S-curve time ramp 2.
P3.4.5
Accel Time 2
s
0.1
3000
10
502
Defines the time required to
increase output freq from 0 to
Max Frequency (P3.3.1).
P3.4.6
Decel Time 2
s
0.1
3000
10
503
Defines the time required to
decrease output freq from Max
Frequency (P3.3.1) to 0
frequency.
P3.4.7
StartMagnTime
s
0
600
0
516
Defines the time for how long DC
current is fed to motor before
acceleration starts.
P3.4.8
StartMagnCurrent
A
Varies
Varies
Varies
517
Defines the DC current to be used
at start of the motor.
P3.4.9
DC Time Stop
s
0
600
0
508
Determines if braking is ON or
OFF and the braking time of the
DC brake when the motor is
stopping.
P3.4.10
DC Brake Current
A
Varies
Varies
Varies
507
Defines the current injected into
the motor during DC braking.
0 = Disabled
P3.4.11
DC BrakeFreqStop
Hz
0.1
10
1.5
515
The output frequency at which the
DC braking is applied.
P3.4.12
Flux Braking
Disabled
Enabled
Disabled
520
Settings:
0 = Disabled
1 = Enabled
P3.4.13
FluxBrakeCurrent
A
0
Varies
Varies
519
Defines the current level for Flux
braking.
Ramp 1 shape (P3.4.1)
The start and end of acceleration and deceleration ramps can be smoothed with this parameter. Setting value
0 gives a linear ramp shape which causes acceleration and deceleration to act immediately to the changes in
the reference signal.
Setting value 0.1 to 10 seconds for this parameter produces an S-shaped acceleration/deceleration. The
acceleration time is determined with Accel Time 1 (P3.4.2) and Decel Time 1 (P3.4.3). See the following
figure.
These parameters are used to reduce mechanical erosion and current spikes when the reference is changed.