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Fieldbus control through the embedded fieldbus interface (EFB) 423
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.
CW
REF1
REF2
SW
ACT1
ACT2
I/O 1
I/O 2
I/O 3
…
I/O 69
EFB CW
03.09
EFB reference
1
03.10
EFB reference
2
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
on page
425
.
1)
Fieldbus network
Data I/O
selection
EXT1/2
Start commands
Reference
selection
Groups
22/26/28/40 etc.
Cyclic communication
Acyclic communication
58.25
SEL
2)
Parameter
table
0
1
2
3
58.25
SEL
0
1
2
3
2)
EFB profile
Reference
selection
Groups
22/26/28/40 etc.
58.101
…
58.114
20.01
20.06
ACS380 FW.book Page 423 Friday, May 4, 2018 4:18 PM
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