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E.1 What This Chapter Contains
The chapter describes how the drive can be controlled by external devices over a communication network using embedded
fi eldbus.
E.2 Overview
The ACB530 can be set up to accept control from an external system using standard serial communication protocols. When
using serial communication, the ACB530 can either:
• receive all of its control information from the fi eldbus, or
• be controlled from some combination of fi eldbus control and other available control locations, such as digital or analog
inputs and the control panel.
Two basic serial communications confi gurations are available:
• embedded fi eldbus (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.
• fi eldbus adapter (FBA)
E.2.1 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
– Actual value 4
– Actual value 5
– Actual value 6
– Actual value 7
– Actual value 8
E.3 Planning
Network planning should address the following questions:
1. What types and quantities of devices must be connected to the network?
2. What control information must be sent down to the drives?
3. What feedback information must be sent from the drives to the controlling system?
MN796 - ACB530
Fieldbus controller
Connect using either:
• standard embedded fieldbus (EFB) at
terminals X1:28...32
• fieldbus adapter (FBA) module mounted
in slot 2 (option Rxxx).
Chapter EAppendix E
Fieldbus Communications
Fieldbus
Other devices
Fieldbus Communications E-1
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