Parameters 247
43.07 Brake chopper runtime
enable
Selects the source for quick brake chopper on/off control.
0 = Brake chopper IGBT pulses are cut off
1 = Normal brake chopper IGBT modulation allowed.
This parameter can be used to enable the chopper
operation only when the supply is missing from a drive
with a regenerative supply unit.
On
Off 0. 0
On 1. 1
Other [bit] Source selection (see Terms and abbreviations). -
43.08 Brake resistor thermal
tc
Defines the thermal time constant of the brake resistor
thermal model.
0 s
0…10000 s Brake resistor thermal time constant, ie, the rated time to
achieve 63% temperature.
1 = 1 s
43.09 Brake resistor Pmax
cont
Defines the maximum continuous load of the brake
resistor which will eventually raise the resistor
temperature to the maximum allowed value (= continuous
heat dissipation capacity of the resistor in kW) but not
above it. The value is used in the resistor overload
protection based on the thermal model. See parameter
43.06 Brake chopper enable.
See the data sheet of the brake resistor used.
0.00 kW
0.00… 10000.00 kW Maximum continuous load of the brake resistor. 1 = 1 kW
43.10 Brake resistance Defines the resistance value of the brake resistor. The
value is used for the brake resistor protection based on
the thermal model. See parameter 43.06 Brake chopper
enable.
0.0 ohm
0.0…1000.0 ohm Brake resistor resistance value. 1 = 1 ohm
43.11 Brake resistor fault
limit
Selects the fault limit for the brake resistor protection
based on the thermal model. See parameter 43.06 Brake
chopper enable.
When the limit is exceeded, the drive trips on fault 7183
BR excess temperature.
The value is given in percent of the temperature the
resistor reaches when loaded with the power defined by
parameter 43.09 Brake resistor Pmax cont.
105%
0…150% Brake resistor temperature fault limit. 1 = 1%
43.12 Brake resistor warning
limit
Selects the warning limit for the brake resistor protection
based on the thermal model. See parameter 43.06 Brake
chopper enable.
When the limit is exceeded, the drive generates a A793
BR excess temperature warning.
The value is given in percent of the temperature the
resistor reaches when loaded with the power defined by
parameter 43.09 Brake resistor Pmax cont.
95%
0…150% Brake resistor temperature warning limit. 1 = 1%
No. Name/Value Description Default
FbEq 16
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