KEB COMBIVERT F5-A, Applications Manual, Page: 395 / 552

Protective functions
© KEB, 2012-10 COMBIVERT F5-A, -E, -H Page 7.13 - 21
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7.13.5.3 Time monitoring abnormal stopping
For safety, a maximum time for the abnormal stopping-function can be programmed.
Pn.68: Max. abn. stopping time
Value Explanation
0,01...100,00 s
time after which the inverter switches from malfunction- ("abnormal stop" A.XX) to the
error state (E.XX)
If the inverter is still in the malfunction state (A.XX) after this time (no RESET or automatic restart was exe-
cuted), the inverter switches off the modulation and changes to the corresponding error state (A.XX => E.XX).
7.13.5.4 S-curve for quick stop ramp
Pn.83: Quick stop ramp for s-curve
Value Explanation
0...5.00 s Quick stop s-curve time is valid for the quick stop ramp (Pn.60), set-programmable
7.13.5.5 Abnormal stopping via control word
Abnormal stopping can also be triggered via the control word (SY.43 and SY.50, respectively ). Then, the status
displays "79: abnormal stopping" (StOP).
The behaviour for abnormal stopping via control word can be defined
in parameter Pn.58 „quick stop mode“.
Abnormal stopping mode determines the behaviour for abnormal stopping via control word.
Pn.58: Quick stop mode
Bit Meaning Value Explanation
2
Quick stop via con-
trol word (SY.50)
0: Sy.50 modulation off disabling of modulation after reaching speed 0
4: Sy.50 modulation on Fast stop with holding torque on reaching speed 0
7.13.6 Speed search
The speed search permits a relatively smooth engagement of the frequency inverter onto a running motor.
Without activation of the speed search, the motor is always slowed down first. In closed-loop operation with
encoder, this occurs at the torque limit, in closed-loop operation without encoder, the motor must be stopped
with DC-current braking.
On activation of the speed search, however, the current speed is determined and the drive is accelerated or
decelerated from this starting point to the setpoint speed, according to the adjusted ramps.
Parameter Pn.26 "Speed search starting condition" determines after which events the speed search is to be
executed.