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Control through the embedded fieldbus interface 337
Control word and Status word
The Fieldbus 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 Control word is
sent by the fieldbus controller to the drive. The drive switches between its states
according to the bit-coded instructions of the Control word. In the embedded fieldbus
communication, the CW is written to drive parameter
from where
it can be used in the control of the drive. The Fieldbus CW is either written to the drive
Control word as it is, or the data is converted. See section
The Fieldbus status word (SW) is a 16-bit or 32- bit packed boolean word. It contains
status information from the drive to the fieldbus controller. In the embedded fieldbus
communication, the SW is read from drive parameter
. The Drive
status word is either written to the fieldbus SW as it is or the data is converted. See
section
About the EFB communication profiles
on page
.
References
Fieldbus references (REF1 and REF2) are 16-bit or 32-bit signed integers. The
contents of each reference word can be used as the speed, frequency, or process
reference. In the embedded fieldbus communication, the REF1 and REF2 are written
to
and
from where you can use them in the
control of the drive. The references are either written to the drive references as they
are, or the values are scaled. See section
About the EFB communication profiles
on
page
Actual values
Fieldbus actual signals (ACT1 and ACT2) are 16-bit or 32-bit signed integers. They
convey selected drive parameter values from the drive to the master. The drive
values are either written to the fieldbus actual values as they are, or the values are
scaled. See section
About the EFB communication profiles
on page
Data inputs/outputs
Data input/output (I/O) are 16-bit or 32-bit words containing selected drive parameter
values. Parameters
define the addresses from
which the master either reads data (input) or to which it writes data (output).
Summary of Contents for ACQ810
Page 1: ...ABB industrial drives Firmware manual Standard pump control program for ACQ810 drives ...
Page 4: ......
Page 14: ...14 About the manual ...
Page 56: ...56 Control locations ...
Page 97: ...Application macros 97 ...
Page 98: ...98 Application macros ...
Page 100: ...100 Application macros ...
Page 101: ...Application macros 101 ...
Page 106: ...106 Application macros 75 01 Operation mode Multipump 76 01 Enable MF comm Yes ...
Page 356: ...356 Control through the embedded fieldbus interface ...
Page 366: ...366 Control through a fieldbus adapter ...
Page 374: ...374 Control block diagrams ...