Standard Serial Communication; Overview - ABB ACS 400 User Manual

Standard Serial Communication

Overview

The ACS 400 can be connected to an external control system using the standard Modbus fieldbus
connection.
The ACS 400 can receive all of its control information either from the Modbus fieldbus, or the
control can be distributed between the fieldbus and other available control locations, e.g. digital/
analogue 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 can
be configured by the user. To control the ACS 400 via Modbus, ACS 400 must be parameterised to
accept control commands and/or frequency references from Channel 1. Channel 0 is reserved for
drive control panels ACS-PAN and ACS100-PAN, and for the Drive Window PC tool.
Optional serial communication features
ACS 400 can also be connected to number of other fieldbuses using special fieldbus adapter
modules. These adapters are connected using an optical DDCS link (DDCS=Distributed Drives
Control System). For more information on these options, contact your supplier.
Channel 1
Connector X3
Modbus fieldbus (RS485)
Figure 61 Standard serial communication features of ACS 400.
ACS 400 User's Manual
ACS 400
Channel 0
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Connector for optional DDCS
communication module
115