ABB ACQ80-04 User Manual

226 Fieldbus control through the embedded fieldbus interface (EFB)
Basics of the embedded fieldbus interface
The cyclic communication between a fieldbus system and the drive consists of 16-bit
data words or 32-bit data words (with a transparent control profile).
The diagram below illustrates the operation of the embedded fieldbus interface. The
signals transferred in the cyclic communication are explained further below the
diagram.
 Control word and Status word
The Control Word (CW) is a 16-bit or 32-bit packed boolean word. It is the principal
means of controlling the drive from a fieldbus system. The CW is sent by the fieldbus
controller to the drive. With drive parameters, the user selects the EFB CW as the
source of drive control commands (such as start/stop, emergency stop, selection
CW
SW
ACT1
ACT2
I/O 1
I/O 2
I/O 3
…
I/O 69
EFB CW
EFB SW
Actual 1
Actual 2
Par. 01.01…255.255
1. See also other parameters which can be controlled through fieldbus.
2. Data conversion if parameter 58.25 Control profile is set to ABB Drives. See section About the control
profiles (page 229).
1)
Fieldbus network
Data I/O
selection
Start commands
Cyclic communication
Acyclic communication
58.25
SEL
2)
Parameter
table
0
1
2
3
58.25
SEL
0
1
2
3
2)
EFB profile
58.101
…
58.114
ACQ80 FW.book Page 226 Thursday, February 14, 2019 11:33 AM

ABB ACQ80-04 Specifications

General

Brand	ABB
Model	ACQ80-04
Category	DC Drives
Language	English