Fieldbus control with the embedded fieldbus 291
Drive control parameters
After the Modbus communication has been set up, the drive control parameters listed
in the table below should be checked and adjusted when necessary.
The
Setting for fieldbus control
column gives the value to use when the Modbus
interface is the desired source or destination for that particular signal. The
Function/Information
column gives a description of the parameter.
Parameter
Setting for
fieldbus
control
Function/Information
Modbus register
address
CONTROL COMMAND SOURCE SELECTION
ABB DRV
DCU
Enables
bits 0…1 (
) when
EXT1 is selected as the active
control location.
40031 bits
0…1
Enables
bits 0…1 (
) when
EXT2 is selected as the active
control location.
40031 bits
0…1
Enables rotation direction control
and
. The direction control is
explained in section
.
40031 bit 2
Enables EXT1/EXT2 selection
through
bit 5 (with ABB drives profile
bit 11).
40001
bit 11
40031 bit 5
Fieldbus reference REF1 is used
when EXT1 is selected as the
active control location. See section
on page
for information on the alternative
settings.
40002 for REF1
Fieldbus reference REF2 is used
when EXT2 is selected as the
active control location. See section
on page
for information on the alternative
settings.
40003 for REF2
OUTPUT SIGNAL SOURCE SELECTION
ABB DRV
DCU
Enables relay output RO control by
signal
40134 for signal
135
Directs the contents of fieldbus
reference
to analog output AO.
40135 for signal
SYSTEM CONTROL INPUTS
ABB DRV
DCU
Enables the control of the inverted
Run enable signal (Run disable)
through
bit 6 (with ABB drives profile
bit 3).
40001 bit 3 40031 bit 6
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