Siemens SINAMICS G120 Original Instructions Manual page 282

Setting functions
8.7 Application-specific functions
Figure 8-23
You have connected the braking resistor and ensured that temperature monitoring is set up.
Procedure: 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 8- 27
Parameter
p0219
p0844
282
Braking resistor connections (example: temperature monitoring via DI 3)
Parameter
Description
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 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 power rating of 1 kW × 2 s / 10 s = 0.2 kW and set the maximum
braking power to: p0219 = 1 (kW).
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.
Inverter with CU230P-2 Control Units
Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG