KEB COMBIVERT F5-A, Руководство по применению, Страница: 389 / 552

Protective functions
© KEB, 2012-10 COMBIVERT F5-A, -E, -H Page 7.13 - 15
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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.
Pn.67: Quick stop maximum torque corner speed
Value Explanation
0...32000.00Nm
the limiting characteristic for abnormal stopping is defined by
Pn.67 instead of dr.16.
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).
Pn.58: Quick stop mode
Bit Meaning Value Explanation
0 Quick stop mode (F5-G)
0: Ramp generator
Abnormal stopping at the abnormal stopping
ramp
1: Differential con-
troller Deceleration time for abnormal stopping is deter-
mined by means of a controller
1 Quick stop act. value (F5-G)
0: Apparent current
Current limit for deceleration refers to the appa-
rent current
2: Active current
Current limit for deceleration refers to the active
current
2
Abnormal stopping via con-
trol word (SY.50)
0: Sy.50 modulation
off Shutoff of the modulation after reaching of speed
0 due to abnormal stopping
4: Sy.50 modulation
on Fast stop with holding torque on reaching speed
0
3 Status bit at standstill
0: Status bit on
The status bit "abnormal stopping" remains
active until leaving the function
8: Status bit off
The status bit "abnormal stopping" is reset when
the drive has reached standstill
For abnormal stopping at the ramp generator, parameter Pn.60 is the ramp time for the deceleration ramp.