ABB ACS880 Firmware Manual

Also see for ACS880 Series: Quick start up guide Quick start guide User manual Electrical planning instructions Supplement

Contents

ABB ACS880 Firmware Manual Manual pdf 32 page image

32 Program featuresRun enable, Start/stop and Start enable controlThe user can control the operation of the DC/DC converter with the Run enable command,Start/Stop command and Start enable command. There are parameters in the controlprogram for defining the value or source for each of the commands. By default, allcommands are on.Note: When you switch the control panel to local control, the control program startsreading the Start/Stop from the panel (Start and Stop keys). The parameter-definedStart/Stop source is not valid until you switch the panel back to remote control. TheLoc/Rem key of the panel selects between local and remote control.WARNING! Do not change the parameter settings related to Run enable,Start/Stop or Start enable unless you are absolutely sure what you are doing. TheI/O wirings of the cabinet-installed multidrive are done at the factory. Settings and diagnosticsControl panel key: Loc/RemParameters: 120.01 Ext1 commands…120.04 Ext1 in2, 120.12 Run enable 1, 120.19Enable start signalWarnings: AE5A Enable start signal missing, AE5B Run enable missingDC/DC converter systemDC/DC converter (DDC) transfers energy from a common DC bus of an ACS880 drive intoan external energy storage and discharges energy back to the DC bus. This is useful, forexample, if you want to store the braking energy of an high inertia motor and utilize theenergy later when accelerating the motor. This saves energy compared to the use of abrake chopper and a resistor where the surplus motor braking energy is dissipated in thebrake resistor as heat. The energy storage can be, for example, a battery or supercapacitor.The recommended energy storage operating voltage isUstorage = 150 V… 80% of UDCIt is not optimal to operate with a low energy storage voltage. The normal operation rangeis indicated in the type designation label. The DC bus voltage cannot be lower than theenergy storage voltage.The DC/DC converter consists of a three-phase IGBT bridge, and of three output inductors(chokes), one for each phase. The outputs of the chokes are all connected to the positiveterminal of the energy storage. The negative terminal of the energy storage is connectedto the negative potential of the drive DC bus.