12 • vacon Description of parametersTel.+358 (0)201 2121 • Fax +358 (0)201 212 2054. DESCRIPTION OF PARAMETERS4.1 Basic parameters2.1.1 Brake Chopper Level (ID1267)Brake chopper operation level in volts. This is the DC link voltage level when the BCUstarts to discharge the capacitors through the brake resistor.2.1.2 ID Run (ID631)This parameter is used for manual identification for brake resistor connection. Brakechopper unit makes automatic identification during every power-up. However, if resistorconnection is changed during service, ID Run can be executed manually with thisparameter by setting the value “1=ID Run”.