Siemens CU240B-2 - Page 291

Advanced commissioning
6.7 Application-specific functions
Converter with the CU240B-2 and CU240E-2 Control Units
Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
291
Set dynamic braking
Parameter
Description
p0219
Braking power of the braking resistor
(factory setting: 0 kW)
Set the braking power of the braking resistor.
Example: In your particular application, the motor brakes every 10 seconds. In so doing,
the braking resistor must handle a braking power of 1 kW for 2 s. Use a braking resistor
with a continuous rating of 1 kW × 2 s / 10 s = 0.2 kW, and set the maximum braking
power to: p0219 = 1 (kW).
Under certain circumstances, for low braking power ratings, the inverter extends the
ramp-down time of the motor.
For p0219 > 0, the inverter deactivates the VDC_max controller.
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 inverter.