Siemens bt300 Operator's Manual page 52

Chapter 4 - Parameters and Menu Structure
Parameters (M3)
Structure Parameter
P3.4.1 Ramp 1 Shape
P3.4.2 Accel Time 1
P3.4.3 Decel Time 1
P3.4.4 Ramp 2 Shape
P3.4.5 Accel Time 2
P3.4.6 Decel Time 2
P3.4.7 StartMagnTime
P3.4.8 StartMagnCurrent
P3.4.9 DC Time Stop
P3.4.10 DC Brake Current
P3.4.11 DC BrakeFreqStop
P3.4.12 Flux Braking
P3.4.13 FluxBrakeCurrent
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.
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Table 30: Ramp and Brakes Settings.
Unit Min
s 0 10
s 0.1 3000
s 0.1 3000
s 0 10
s 0.1 3000
s 0.1 3000
s 0 600
A Varies Varies
s 0 600
A Varies Varies
Hz 0.1 10
Disabled Enabled
A 0 Varies
Siemens BT300 HVAC Drive
Max Default ID
0 500
20 103
20 104
0 501
10 502
10 503
0 516
Varies 517
0 508
Varies 507
1.5 515
Disabled 520
Varies 519
Description
S-curve time ramp 1.
Defines the time required to
increase output freq from 0 to Max
Frequency (P3.3.1).
Defines the time required to
decrease output freq from Max
Frequency (P3.3.1) to 0 frequency.
S-curve time ramp 2.
Defines the time required to
increase output freq from 0 to Max
Frequency (P3.3.1).
Defines the time required to
decrease output freq from Max
Frequency (P3.3.1) to 0 frequency.
Defines the time for how long DC
current is fed to motor before
acceleration starts.
Defines the DC current to be used
at start of the motor.
Determines if braking is ON or OFF
and the braking time of the DC
brake when the motor is stopping.
Defines the current injected into the
motor during DC braking.
0 = Disabled
The output frequency at which the
DC braking is applied.
Settings:
0 = Disabled
1 = Enabled
Defines the current level for Flux
braking.
DPD01809
2016-06-07