Operating Instructions

Siemens Application Siemens Industry, Inc. • 39
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3
3.5.6 Group 3.4: Ramp & Brakes Setup
Two ramps are available (two sets of acceleration time, deceleration time and ramp shape). The second
ramp can be activated by a digital input.
NOTE: Ramp 2 always has higher priority and is used if a digital input for ramp selection is activated or
the Ramp 2 threshold is smaller than RampFreqOut.
Table 28: Ramp and brakes setup.
Code Parameter Min Max Unit Default ID Description
P3.4.1 Ramp 1 shape 0.0 10.0 s 0.0 500 S-curve time ramp 1
P3.4.2 Acceleration time 1 0.1 3000.0 s 20.0 103
Defines the time required for
the output frequency to
increase from zero frequency
to maximum frequency.
P3.4.3 Deceleration time 1 0.1 3000.0 s 20.0 104
Defines the time required for
the output frequency to
decrease from maximum fre-
quency to zero frequency.
P3.4.4 Ramp 2 shape 0.0 10.0 s 0.0 501
S-curve time ramp 2. See
P3.4.1.
P3.4.5 Acceleration time 2 0.1 3000.0 s 10.0 502 See P3.4.2.
P3.4.6 Deceleration time 2 0.1 3000.0 s 10.0 503 See P3.4.3.
P3.4.7 Start magnetizing time 0,00 600,00 s 0,00 516
This parameter defines the
time for how long DC current
is fed to motor before accel-
eration starts.
P3.4.8
Start magnetizing cur-
rent
Varies Varies A Varies 517
P3.4.9
DC braking time at
stop
0,00 600,00 s 0,00 508
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 Varies Varies A Varies 507
Defines the current injected
into the motor during DC-
braking.
0 = Disabled
P3.4.11
Frequency to start DC
braking at ramp stop
0,10 10,00 Hz 1,50 515
The output frequency at
which the DC-braking is
applied.
P3.4.12 Flux braking 0 1 0 520
0 = Disabled
1 = Enabled
P3.4.13 Flux braking current 0 Varies A Varies 519
Defines the current level for
flux braking.