Siemens SINAMICS V20 Operating Instructions Manual page 274

Parameter list
8.2 Parameter list
Parameter Function
P1336[0...2] Slip limit [%]
Compensation slip limit in [%] relative to r0330 (rated motor slip), which is added to frequency setpoint.
Slip compensation (P1335) active.
Dependency:
r1337 CO: V/f slip frequen-
cy [%]
Displays actual compensated motor slip as [%]. f_slip [Hz] = r1337 [%] * P0310/100
Dependency: Slip compensation (P1335) active.
P1338[0...2] Resonance damping
gain V/f
Defines resonance damping gain for V/f. The di/dt of the active current will be scaled by P1338. If di/dt in-
creases the resonance damping circuit decreases the converter output frequency.
Dependency: This parameter is influenced by automatic calculations defined by P0340.
Note: The resonance circuit damps oscillations of the active current which frequently occur during no-load opera-
tion. In V/ f modes (see P1300), the resonance damping circuit is active in a range from approx. 6 % to 80 %
of rated motor frequency (P0310). If the value of P1338 is too high, this will cause instability (forward control
effect).
P1340[0...2] Imax controller pro-
portional gain
Proportional gain of the I_max controller.
The Imax controller reduces converter current if the output current exceeds the maximum motor current
(r0067).
In linear V/f, parabolic V/f, FCC, and programmable V/f modes the I_max controller uses both a frequency
controller (see P1340 and P1341) and a voltage controller (see P1345 and P1346).
The frequency controller seeks to reduce current by limiting the converter output frequency (to a minimum of
the two times nominal slip frequency).
If this action does not successfully remove the overcurrent condition, the converter output voltage is reduced
using the I_max voltage controller.
When the overcurrent condition has been removed successfully, frequency limiting is removed using the
ramp-up time set in P1120.
In linear V/f for textiles, FCC for textiles, or external V/f modes only the I_max voltage controller is used to
reduce current (see P1345 and P1346).
Note: The I_max controller can be disabled by setting the frequency controller integral time P1341 to zero. This
disables both the frequency and voltage controllers.
Note that when disabled, the I_max controller will take no action to reduce current but overcurrent warnings
will still be generated, and the converter will trip in excessive overcurrent or overload conditions.
P1341[0...2] Imax controller inte-
gral time [s]
Integral time constant of the I_max controller.
P1341 = 0: I_max controller disabled
•
P1340 = 0 and P1341 > 0: frequency controller enhanced integral
•
P1340 > 0 and P1341 > 0: frequency controller normal PI control
•
Dependency: This parameter is influenced by automatic calculations defined by P0340.
Note: See P1340 for further information. The Factory setting depends on converter power.
272
Range Factory
default
0 - 600 250
- -
0.00 - 10.00 0.00
0.000 - 0.499 0.030
0.000 - 50.000 0.300
Can be Scaling Data set
changed
U, T - DDS
- PERCEN -
T
U, T - DDS
U, T - DDS
U, T - DDS
Operating Instructions, 10/2019, A5E34559884-012
Data Acc.
type Level
U16 2
Float 3
Float 3
Float 3
Float 3
SINAMICS V20 Converter