Embedded Fieldbus; Control Interface; Overview - ABB ACS550-01 User Manual

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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
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 "Modbus Protocol
Technical Data" and "ABB Control Profiles Technical Data" later in this section.)
• Fieldbus adapter (FBA) – See "Fieldbus Adapter" on page 180.

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
– Actual value 3
Embedded Fieldbus
terminals X1:28...32
mounted in slot 2 (option Rxxx)
Fieldbus Controller
Fieldbus
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