Fieldbus control through the embedded fieldbus interface (EFB) 347
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,
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
is set to
. See section
(page
).
1)
Fieldbus network
Data I/O
selection
Start commands
Cyclic communication
Acyclic communication
SEL
2)
Parameter
table
0
1
2
3
SEL
0
1
2
3
2)
EFB profile
Summary of Contents for ACQ80
Page 1: ... ABB DRIVES FOR WATER ACQ80 standard program control Firmware manual ...
Page 2: ... Related documents are listed on page 13 ...
Page 4: ......
Page 10: ...10 Table of contents ...
Page 32: ...32 Startup control with I O and ID run ...
Page 34: ...34 Using the control panel ...
Page 74: ...74 Program features ...
Page 78: ...78 Control macros ...
Page 380: ...380 Fieldbus control through a fieldbus adapter ...
Page 384: ...384 Parameterization with Drive Composer ...
Page 388: ...388 Parameterization with Automation builder drive manager ...