Function diagrams
Servo control
2-900
© Siemens AG 2012 All Rights Reserved
SINAMICS S110 List Manual (LH7), 06/2012, 6SL3097-4AP10-0BP3
Fig. 2-133 5300 – U/f control for diagnostics
Servo control - V/f control
- 5300 -
Function diagram
87654321
fp_5300_98_eng.vsd
DO: SERVO
SINAMICS S120
30.09.11 V04.04.00
p0115[0] (125.00 μs)
f_set_1
f_max
[5030.8]
[3050.6]
[3095.7]
n_max (p1082)
Reference variable for
the ramp-up time
60
np
f
⋅
=
60
np
f
⋅
=
Uq_set_3
f
U
f
430 V
(Synchronous
frequencies)
r1438
n_ctrl n_set
r0066
f_outp
<1>
Monitoring
F07801
"Motor overcurrent"
(No automatic current limiting
for V/f control)
[5730.1]
r0313[M]
Pole pair number p
r0063
n_act smooth [rpm]
r0313[M]
p
f60
n
⋅
=
Pole pair number p
Vf T res damp
p1339 (20.00)
–
+
f_res damp
r0078
f_outp
V/f resonance damping
[6714.4]
3,1 Hz
4,77 Hz
95 % x p1349
1
<2>
p1349
f/f
Mot N
f_soll_2
0
f
max
Safety ramp-function generator
for V/f control (as stall
protection)
Vf t_rmp-up_rmp-dn
0.000...999 999.000 [s]
p1318[D] (10.000)
f_set_2
+
+
Max.
ramp
steepness
r1538
r1318
r1539
r1493
<3> <3>
r0068
I_act abs val
p0640
Current limit
Stop ramp-function
generator
0
1
<1> The changeover to V/f control is represented at [5730.2].
<2> For p1349 = 0: Limit at 0,95 x
f
Mot N
<= 45 Hz.
<3> Max. ramp steepness is also influenced by Vdc controller (p1240 0).
Vf char f4
0.00...10 000.00 [Hz]
p1326[D] (0.00)
Vf U at f=0 Hz
0.0...50.0 [V]
p1319[D] (0.0)
Vf char U4
0.0...10 000.0 [V]
p1327[D] (0.0)
V/f characteristic
V_set Ud_set_3
To current control
Vf gain res damp
p1338 (1.00)
f_outp smooth
r0024
100 ms
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