Embedded Fieldbus; Control Interface; Overview - ABB ACS550 User Manual

ACS550 User's Manual

Embedded fieldbus

Overview

The ACS550 can be set up to accept control from an external system using standard
serial communication protocols. When using serial communication, the ACS550 can
either:
• receive all of its control information from the fieldbus, or
• be controlled from some combination of fieldbus control and other available
control locations, such as digital or analog inputs and the control panel.
Connect using either:
• standard embedded fieldbus (EFB) at
• fieldbus adapter (FBA) module mounted
Two basic serial communications configurations are available:
• embedded fieldbus (EFB) – Using the RS485 interface at terminals X1:28...32 on
the control board, a control system can communicate with the drive using the
Modbus® protocol. (For protocol and profile descriptions, see sections
protocol technical data
chapter.)
• fieldbus adapter (FBA) – See chapter

Control interface

In general, the basic control interface between Modbus and the drive consists of:
• Output words
– Control Word
– Reference1
– Reference2
• Input words
– Status Word
– Actual value 1
– Actual value 2
terminals X1:28...32
in slot 2 (option Rxxx).
and
Fieldbus controller
Fieldbus
ABB control profiles technical data
Fieldbus adapter
Other devices
Modbus
later in this
on page 221.
Embedded fieldbus
189