ABB ACS880 Firmware Manual
Also see for ACS880 Series: Quick start up guideQuick start guideUser manualElectrical planning instructionsSupplement
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26 Control locations and operating modesControl locations for start/stop Local control vs. external controlThe ACS880 has two main control locations: external and local. The control location isselected with the Loc/Rem key on the control panel or in the PC tool.External controlWhen the DC/DC converter is in external control, control commands are given through• the I/O terminals (digital and analog inputs)• fieldbus interface (via the embedded fieldbus interface or an optional fieldbus adaptermodule) or• optional I/O extension modules.External references are given through the fieldbus interface or analog inputs.Note: Typically, ABB wires essential external control signals and status monitoring signalsof a DC/DC converter of the cabinet-installed drive to its digital inputs and relay outputs atthe factory. We also set the parameters related to the external control signals accordingly.The commission engineer must not change these settings or the external control does notoperate as planned. See the delivery-specific circuit diagrams.Local controlOnly the start and stop commands are given from the control panel when the DC/DCconverter is in local control. If the user does not want to use the power/current or DCvoltage references sent by PLC in local control, the power/current reference can be givento parameter 122.01 User Power ref when parameter 122.02 Power ref sel is set to Userref. Correspondingly, the DC voltage reference can be given to parameter 123.01 User DCvoltage ref when parameter 123.02 DC voltage ref selection is set to User ref.Local control is mainly used during commissioning and maintenance. When switched tolocal control, the control panel Start and Stop keys override the external Start/Stop sourcedefined for the control program. However, to control the DC/DC converter unit on and offby the panel, you must still have the Run enable and Start enable commands on in thecontrol program. See section Run enable, Start/stop and Start enable control on page 32.Changing the control location to local can be disabled by parameter (119.17).Control panel or Drive composerPC tool (optional)1) Extra inputs/outputs can be added by installing optional I/O extension modules (FIO-xx)in the option slots of the control unit.PLC(= Programmablelogic controller)I/O 1)Drive-to-drive (D2D)link or Embeddedfieldbus interfaceExternal controlLocal controlDC/DCconverterunitFieldbus adapter (Fxxx) orDDCS communication module |
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