Basics Of The Embedded Fieldbus Interface - ABB ACS880 Firmware Manual

Fieldbus control through the embedded fieldbus interface (EFB) 543

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 the transparent control profiles).
The diagram below illustrates the operation of the embedded fieldbus interface. The
signals transferred in the cyclic communication are explained further below the
diagram.
Fieldbus network
Cyclic communication
CW
0
2)
REF1
REF2
2
SW
0
2)
ACT1
2
ACT2
I/O 1
I/O 2
I/O 3
...
I/O 24
Acyclic communication
1. See also other parameters which can be controlled through fieldbus.
2. Data conversion if parameter
profiles (page 546).
3. If parameter 58.25 Control profile
• the sources of the status word and actual values are selected by parameters
actual values 1 and 2 are automatically selected according to reference type), and
• the control word is displayed by
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SEL
58.25
Data I/O
selection
58.101
...
58.124
58.25 Control profile
is set to Transparent,
06.05 EFB transparent control
EFB profile
3)
EFB CW
03.09 EFB reference
1
03.10 EFB reference
2
3)
EFB SW
3)
Actual 1
3)
Actual 2
Par. 01.01...255.255
is set to ABB Drives. See section
58.30...58.32
word.
1)
EXT1/2
Start commands
20.01
20.06
Reference
selection
Groups
22/26/28/40 etc.
Reference
selection
Groups
22/26/28/40 etc.
Parameter
table
About the control
(otherwise,