Page 7.5 - 10 COMBIVERT F5-A, -E, -H © KEB, 2012-10
Motor data and controller adjustments of the asynchronous motor
7.5.1.7.4 Adjustment of the slip compensation (cS.00, cS.01, cS.04, cS.06, cS.09)
The integrated speed controller is used at cS.00 = 2 for slip compensation. The rotor speed calculated from the
motor model is selected as the actual controller value by cS.01 = 2.
The slip compensation can be congured with bits 3-6 in cS.00.
cS.00:Controllerconguration
Bit Meaning Value Explanation
3
Control mode
0
Change of direction of rotation via the controller not
possible
8
Change of direction of rotation via the controller pos-
sible
4
0 no controller intervention for controller setpoint = 0 min
-1
16
controller intervention even for controller setpoint = 0
min
-1
5
0 no breakdown slip limit
32 breakdown slip limit (rated slip x dr.09)
6
0 default slip compensation
64 improved slip compensation (cS.03)
cS.01: Actual source
Value Explanation
0 Encoder interface channel 1, only reasonable for closed-loop
operation
1 Encoder interface channel 2, only reasonable for closed-loop
operation
2 calculated rotor speed
cS.04 Settings Limit
0…4000 rpm x resolution factor (dependent on ud.02)
Default: 750 rpm x resolution factor
The speed limit determines the maximum controller intervention.
cS.06 KP speed, cs.09 KI speed
0…32767, default 300(KP), 100(KI)
Proportional and/or integral factor of the speed controller.
ATTENTION! These parameters must be adjusted before activation of the slip compensation. The default va-
lues are optimised for closed-loop operation.
This adaption is carried out with the motor adaption (see chapter 7.5.1.7.3), and only a ne adjustment is ne-
cessary.
7.5.1.7.5 Improved slip compensation (cS.00 Bit 6 = 64, cS.03)
During the standard slip compensation, the slip is proportional calculated from the effective current. This calcu-
lation becomes imprecise above the nominal setpoint and in generatoric operation.
For the improved slip compensation, the slip calculation during motor operation above the nominal setpoint is
approximated to the real M/n-characteristic with a parabolic function. Greater inaccuracies will then occur only
above twice the rated torque.
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