ACS 400 User’s Manual 129
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/
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 can
be configured by the user. To control the ACS 400 via Modbus, the ACS 400 must be programmed
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 DriveWindow PC tool.
Optional serial communication features
The ACS 400 can also be connected to a 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.
Figure 55 Standard serial communication features of ACS 400.
Channel 1
Connector X3
Modbus fieldbus (RS485)
Channel 0
ACS100-PAN
ACS-PAN
DriveWindow
ENTER
MENU
LOC REM
mAVs
SETOUTPUTPAR MENU FWDREV
o
Crpm
%
REM
LOC
kHz
FAULT
LOCREM
ACS 400
Connector for optional DDCS
communication module
http://nicontrols.com
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