Functions
7.7 Application-specific functions
Inverter cabinet units
384
Operating Instructions, 12/2014, A5E32923362A
Figure 7-18 Simplified representation of dynamic braking with respect to time
Set dynamic braking
In order to optimally utilize the connected braking resistor, you must know the braking power
that occurs in your particular application.
Table 7- 28 Parameter
Parameter Description
p0219
Braking power of the braking resistor (factory setting: 0 kW)
Set the maximum braking power that the braking resistor must handle in your particular
application.
Under certain circumstances, for low braking power ratings, the inverter extends the
ramp-down time of the motor.
Example: In your particular application, the motor brakes every 90 seconds. In so doing,
the braking resistor must handle a braking power of 50 kW for 20 s. Set the maximum
braking power to: p0219 = 50 (kW).
Note: As a consequence, the Vdc max controller is automatically deactivated (p1240 = 0
or p1280 = 0) the minimum ramp-down time (p1127) and the regenerative power limit
(p1531) are adapted.
p0844
No coast down / coast down (OFF2) signal source 1
p0844 = 722.x
Monitor the overtemperature of the braking resistor with digital input x
of the Control Unit.
This requires that the thermoswitch of the braking resistor is con-
nected to digital input x of the Control Unit.
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