Siemens SINAMICS G120 Original Instructions Manual page 279

Setting and enabling compound braking
Parameter
p3856
r3859.0
NOTICE
Motor damage from overheating with compound braking
The motor will overheat if braking lasts too long or the motor is braked too often. This may
damage the motor.
Monitor the motor temperature. If the motor gets too hot during operation you must select
another braking method or give the motor more time to cool down.
Inverter with CU230P-2 Control Units
Operating Instructions, 11/2013, FW V4.6.6, A5E02430659B AG
Description
Compound braking current (%)
With the compound braking current, the magnitude of the DC current is defined, which
is additionally generated when stopping the motor for operation with U/f control to
increase the braking effect.
p3856 = 0
Compound braking locked
p3856 = 1 ... 250
Current level of the DC braking current as a % of the rated motor current (p0305)
Recommendation: p3856 < 100% × (r0209 - r0331) / p0305 / 2
Compound-braking status word
r3859.0 = 1: Compound braking is active
Setting functions
8.7 Application-specific functions
279