Parameters and firmware blocks178Group 48 BRAKE CHOPPERConfiguration of internal brake chopper.4848 BRAKE CHOPPERFirmware block:BRAKE CHOPPER(48)This block configures the brakechopper control and supervision.48.01 BC ENABLE FW block: BRAKE CHOPPER (see above)Enables the brake chopper control.Note: Before enabling brake chopper control, ensure the brake resistor is installed and theovervoltage control is switched off (parameter 47.01 OVERVOLTAGE CTRL). The drive has a built-inbrake chopper.(0) DISABLE Brake chopper control disabled.(1) ENABLETHERM Enable brake chopper control with resistor overload protection.(2) ENABLE Enable brake chopper control without resistor overload protection.This setting can be used, for example, if the resistor is equipped with athermal circuit breaker that is wired to stop the drive if the resistoroverheats.48.02 BC RUN-TIME ENA FW block: BRAKE CHOPPER (see above)Selects the source for quick run-time brake chopper control.0 = Brake chopper IGBT pulses are cut off.1 = Normal brake chopper IGBT modulation. The overvoltage control is automatically switched off.This parameter can be used to program the chopper control to function only when the drive isoperating in generating mode.Bit pointer: Group, index and bit48.03 BRTHERMTIMECONST FW block: BRAKE CHOPPER (see above)Defines the thermal time constant of the brake resistor for overload protection.0…10000 s Brake resistor thermal time constant.48.04 BR POWER MAX CNT FW block: BRAKE CHOPPER (see above)Defines the maximum continuous braking power which will raise the resistor temperature to themaximum allowed value. The value is used in the overload protection.0…10000 kW Maximum continuous braking power.BRAKE CHOPPER 35TLF10 2 msec (11)48.01 BC ENABLE[ Disable ]< 48.02 BC RUN-TIME ENA[ TRUE ]48.03 BRTHERMTIMECONST[ 0 s ]48.04 BR POWER MAX CNT[ 0.0000 kW ]48.05 R BR[ 0.0000 Ohm ]48.06 BR TEMP FAULTLIM[ 105 % ]48.07 BR TEMP ALARMLIM[ 95 % ]
