ACS 400 User’s Manual 95Standard Serial CommunicationOverviewThe ACS 400 can be connected to an external control system using the standard Modbus fieldbusconnection.The ACS 400 can receive all of its control information either from the Modbus fieldbus, or thecontrol can be distributed between the fieldbus and other available control locations, e.g. digital/analog inputs and the drive control panel.The ACS 400 has two serial communication channels (or ports), Channel 0 and Channel 1.Channel 1 is the standard Modbus fieldbus connection. Communication settings of Channel 1 canbe configured by the user. To control the ACS 400 via Modbus, the ACS 400 must be programmedto accept control commands and/or frequency references from Channel 1. Channel 0 is reservedfor drive control panels ACS-PAN and ACS100-PAN, and for the DriveWindow PC tool.Optional serial communication featuresThe ACS400 can also be connected to number of other fieldbuses using special fieldbus adaptermodules. These adapters are connected using an optical DDCS link (DDCS=Distributed DrivesControl System). For more information on these options, contact your local ABB sales office.Figure 40 Standard serial communication features of the ACS 400.Channel 1Connector X3Modbus fieldbus (RS485)Channel 0ACS100-PANACS-PANDriveWindowENTERMENULOC REMmAVsSETOUTPUTPAR MENU FWDREVoCrpm%REMLOCkHzFAULTLOC REMACS 400DDCSOption Module Connector
