Operating Instructions

Siemens Industry, Inc. • 78 Siemens Application
24-hour support [phone] (Dial 2)
Preset frequencies 1 to 7 (P3.3.11 to P3.3.18)
The values of the preset frequencies are automatically limited between the minimum and maximum fre-
quencies (P3.3.1 and P3.3.2). See table below.
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…10 seconds for this parameter produces an S-shaped acceleration/deceleration. The
acceleration time is determined with parameters P3.4.2 and P3.4.3. See Figure 20.
These parameters are used to reduce mechanical erosion and current spikes when the reference is
changed.
Selection
number
Selection name Note
0 Binary coded
Combine activated inputs according to Table to choose the Pre-
set frequency needed.
1 Number (of inputs used)
You can apply the Preset frequencies 1 to 3, depending on how
many of the inputs assigned for Preset frequency selections are
active.
Table 55. Selection of preset frequencies; = input activated.
Required action Activated frequency
Choose value 1 for para-
meter P3.3.3
Preset frequency 0
B2 B1 B0 Preset frequency 1
B2 B1 B0 Preset frequency 2
B2 B1 B0 Preset frequency 3
B2 B1 B0 Preset frequency 4
B2 B1 B0 Preset frequency 5
B2 B1 B0 Preset frequency 6
B2 B1 B0 Preset frequency 7