KEB COMBIVERT F5-A Applications Manual page 389

For asynchronous motors, the maximum cutoff torque for abnormal stopping can also be increased to make
more torque available for braking, even in the field weakening range.
Value
0...32000.00Nm
Quick stop at open loop systems
For abnormal stopping with v/f-characteristic control, the drive is decelerated with the adjusted ramp time, and
at the torque limit, respectively. Whether braking occurs at the ramp or at the current limit is defined in para-
meter Pn.58.
If no abnormal stopping shall be executed, there are different possibililties for the response, depending on the
type of malfunction.
Additionally, for most malfunctions, issuing the value 6 = warning via a digital output is possible.
Thereby, the inverter does not automatically execute an abnormal stopping. With the warning via a digital out-
put, however, an external control is given the opportunity to respond to the malfunction as is appropriate for
the application. To issue the warning message, a digital output must be programmed with the corresponding
switching condition (see chapter 7.3 Programming of the digital outputs).
Bit Meaning
0 Quick stop mode (F5-G)
1 Quick stop act. value (F5-G)
Abnormal stopping via con-
2
trol word (SY.50)
3 Status bit at standstill
For abnormal stopping at the ramp generator, parameter Pn.60 is the ramp time for the deceleration ramp.
© KEB, 2012-10 COMBIVERT F5-A, -E, -H
Pn.67: Quick stop maximum torque corner speed
Explanation
the limiting characteristic for abnormal stopping is defined by Pn.67 instead of dr.16.
Pn.58: Quick stop mode
Value
0: Ramp generator
1: Differential con-
troller
0: Apparent current
2: Active current
0: Sy.50 modulation
off
4: Sy.50 modulation
on
0: Status bit on
8: Status bit off
Protective functions
Explanation
Abnormal stopping at the abnormal stopping
ramp
Deceleration time for abnormal stopping is deter-
mined by means of a controller
Current limit for deceleration refers to the appa-
rent current
Current limit for deceleration refers to the active
current
Shutoff of the modulation after reaching of speed
0 due to abnormal stopping
Fast stop with holding torque on reaching speed
0
The status bit "abnormal stopping" remains
active until leaving the function
The status bit "abnormal stopping" is reset when
the drive has reached standstill
7
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