390 Fieldbus control through the embedded fieldbus interface (EFB)
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. By drive parameters, the user selects the EFB CW as the
source of drive control commands (such as start/stop, emergency stop, selection
between external control locations 1/2, or fault reset). The drive switches between its
states according to the bit-coded instructions of the CW.
The fieldbus CW is either written to the drive as it is (see parameter
), 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. The drive SW is either
written to the fieldbus SW as it is or the data is converted. See section
(page
).
References
EFB references 1 and 2 are 16-bit or 32-bit signed integers. The contents of each
reference word can be used as the source of virtually any signal, such as the speed,
frequency, torque or process reference. In embedded fieldbus communication,
references 1 and 2 are displayed by
and
respectively. Whether the references are scaled or not depends on the settings of
. See section
(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. Whether the
actual values are scaled or not depends on the settings of
and
. See section
(page
).
Data input/outputs
Data input/outputs are 16-bit or 32-bit words containing selected drive parameter
values. Parameters
from which the master either reads data (input) or to which it writes data (output).
Control of drive outputs through EFB
The address selection parameters of the data input/outputs have a setting with which
the data can be written into a storage parameter in the drive. These storage
parameters are readily selectable as signal sources of the drive outputs.
The desired values of the relay outputs (RO) and digital input/outputs (DIO) can be
written in a 16-bit word into
, which is then selected as the
source of those outputs. Each of the analog outputs (AO) of the drive have a
Summary of Contents for ACS860
Page 1: ... ABB INDUSTRIAL DRIVES ACS860 primary control program Firmware manual ...
Page 4: ......
Page 10: ...10 Table of contents ...
Page 18: ...18 Using the control panel ...
Page 24: ...24 Control locations and operating modes ...
Page 54: ...54 Program features ...
Page 78: ...78 Program features ...
Page 90: ...90 Application macros ...
Page 342: ...342 Additional parameter data ...
Page 380: ...380 Fault tracing ...
Page 381: ...Fault tracing 381 ...
Page 382: ...382 Fault tracing ...
Page 436: ...436 Control chain diagrams ...
