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Parameterizing compound braking
Table 7- 28
Parameter
P3856
r3859.0
Compound braking converts part of the kinetic energy of the motor and load into motor heat
(temperature rise). The motor can overheat if braking lasts too long or the drive is braked
too frequently.
Inverter with CU240B-2 and CU240E-2 Control Units
Operating Instructions, 07/2010, FW 4.3.2, A5E02299792B AA
Parameters to enable and set compound braking
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 V/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
Status word, compound braking
r3859.0 = 1: Compound braking is active
CAUTION
Functions
7.9 Technological functions
193
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