Operating instructions

04/02 1 Parameters
MICROMASTER 420 Parameter List
6SE6400-5BA00-0BP0
79
P1336 Slip limit
Min: 0
CStat: CUT Datatype: U16 Unit: % Def: 250
P-Group: CONTROL Active: Immediately QuickComm. No Max: 600
Compensation slip limit in [%] relative to r0330 (rated motor slip), which is added to frequency setpoint.
Dependency:
Slip compensation (P1335) active.
r1337 CO: V/f slip frequency Min: -
Datatype: Float Unit: % Def: -
P-Group: CONTROL Max: -
Displays actual compensated motor slip as [%]
Dependency:
Slip compensation (P1335) active.
P1338 Resonance damping gain V/f Min: 0.00
CStat: CUT Datatype: Float Unit: - Def: 0.00
P-Group: CONTROL Active: Immediately QuickComm. No Max: 10.00
Defines resonance damping gain for V/f. Here, di/dt of the acitve current will be scaled by P1338 (see
diagram below). If di/dt increases the resonance damping circuit decreases the inverter output frequency.
P1338
T
1338P
f
res damping
i
active
-
Note:
The resonance circuit damps oscillations of the active current which frequently occur during no-load
operation.
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 Imax controller prop. gain Min: 0.000
CStat: CUT Datatype: Float Unit: - Def: 0.000
P-Group: CONTROL Active: Immediately QuickComm. No Max: 0.499
Proportional gain of the I_max controller.
Dynamically controls the inverter if the output current exceeds the maximum motor current (r0067). It does
this by first limiting the inverter output frequency (to a possible minimum of the nominal slip frequency). If
this action does not successfully remove the overcurrent condition, the inverter output voltage is reduced.
When the overcurrent condition has been removed successfully, frequency limiting is removed using the
ramp-up time set in P1120.
P1341 Imax controller integral time Min: 0.000
CStat: CUT Datatype: Float Unit: s Def: 0.300
P-Group: CONTROL Active: Immediately QuickComm. No Max: 32.000
Integral time constant of the I_max controller.
P1341 = 0 :
I_max controller disabled
P1340 = 0 and P1341 > 0 :
enhanced integral
P1340 > 0 and P1341 > 0 :
normal PI control
See description in parameter P1340 for further information.
r1343 CO: Imax controller freq. output Min: -
Datatype: Float Unit: Hz Def: -
P-Group: CONTROL Max: -
Displays effective frequency limitation.
Dependency:
If I_max controller not in operation, parameter normally shows max. frequency P1082.
Level:
2
Level:
3
Level:
3
Level:
3
Level:
3
Level:
3