Hardware Manual

Table Of Contents
248 Resistor braking
Set the following parameters (ACS880 primary control program):
Disable the overvoltage control of the drive by parameter 30.30 Overvoltage
control.
Set parameter 31.01 External event 1 source to point to the digital input where
the thermal switch of the brake resistor is wired.
Set parameter 31.02 External event 1 type to Fault.
Enable the brake chopper by parameter 43.06 Brake chopper enable. If
Enabled with thermal model is selected, set also the brake resistor overload
protection parameters 43.08 and 43.09 according to the application.
For frames R5 to R9:
Set parameter 43.07 Brake chopper runtime enable to
Other [bit] and select from parameter 10.01 DI status the digital input where the
thermal switch of the brake resistor is wired.
Check the resistance value of parameter 43.10 Brake resistance.
With these parameter settings, the drive stops by coasting on brake resistor
overtemperature.
WARNING! If the drive is equipped with a brake chopper but the chopper is not
enabled by the parameter setting, the internal thermal protection of the drive
against resistor overheating is not in use. In this case, the brake resistor must be
disconnected.
For settings of other control programs, see the appropriate firmware manual.