4 Function description
BU 0210 en-3117 41
Pos: 16 1 /Anlei tung en/El ektr onik/P OSICON /4. Funkti onsbes chr eibung/ Lag eregel ung @ 14\ mod_1478513400378_388.docx @ 2301696 @ 2 @ 1
4.6 Position control
Pos: 16 2 /Anlei tung en/El ektr onik/P OSICON /4. Funkti onsbes chr eibung/ Lag eregel ung - Var iant en der Posi tio nierung (P600) @ 14\mod_1478514186449_388.docx @ 2301732 @ 3 @ 1
4.6.1 Position control - Position control variants (P600)
Four different positioning variants are possible.
• Linear ramp with maximum frequency (P600, setting 1)
The acceleration is linear. The speed of constant travel is always carried out with the "Maximum
Frequency" set under parameter P105. The acceleration time (P102) and the deceleration time
(P103) are relative to the maximum frequency (P105).
Example
P105 = 50 Hz, P102 = 10 s;
Ramp time = P102 = 10 s
The drive unit accelerates from 0 Hz to 50 Hz in 10 s.
• Lin
ear ramp with setpoint frequency (P600, setting 2)
The acceleration is linear. The speed of constant travel is specified via the setpoint frequency. This
can be changed via the analogue input or via a bus setpoint value. The acceleration time (P102)
and the deceleration time (P103) are relative to the maximum frequency (P105).
Example
P105 = 50 Hz, P102 = 10 s, setpoint 50 % (25 Hz);
Ramp time = P102 * 0,5 = 5 s
The drive unit accelerates from 0 Hz to 25 Hz in 5 s.
• S r
amp with maximum frequency (P600, setting 3)
The speed of constant travel is always carried out with the "Maximum Frequency" set under
parameter P105. However, in positioning operation the frequency ramps can be operated as S
ramps. Compared with conventional linear frequency increases (or decreases), according to the
acceleration time (or deceleration time) a gentle rounding (without jerking) is performed to change
from a static state to acceleration or braking. Also, when the final speed is attained, the
acceleration or deceleration is slowly reduced. The S ramp always corresponds to a rounding of
100 % and only applies, when positioning is also performed. The effective ramp time is doubled by
S ramping. The acceleration time (P102) and the deceleration time (P103) are relative to the
maximum frequency (P105).
Example
P105 = 50 Hz, P102 = 10 s;
Ramp time = P102 * 2 = 10 s * 2 = 20 s
The drive unit accelerates from 0 Hz to 50 Hz in 20 s.
The S ramp function is disabled during a reference point run.
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