Actual Values - ABB ACSM1 Firmware Manual

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switches between its states according to the bit-coded instructions of the Control
Word.
The Status Word (SW) is a word containing status information, sent by the drive to
the fieldbus controller.

Actual values

Actual values (ACT) are 16/32-bit words containing information on selected
operations of the drive.
FBA communication profile
The FBA communication profile is a state machine model which describes the
general states and state transitions of the drive. The
presents the most important states (including the FBA profile state names). The FBA
Control Word
these states and the FBA Status Word
status of the drive.
Fieldbus adapter module profile (selected by adapter module parameter) defines
how the control word and status word are transmitted in a system which consists of
fieldbus controller, fieldbus adapter module and drive. With transparent modes,
control word and status word are transmitted without any conversion between the
fieldbus controller and the drive. With other profiles (eg, PROFIdrive for FPBA-01,
AC/DC drive for FDNA-01, DS-402 for FCAN-01 and ABB Drives profile for all
fieldbus adapter modules) fieldbus adapter module converts the fieldbus-specific
control word to the FBA communication profile and status word from FBA
communication profile to the fieldbus-specific status word.
For descriptions of other profiles, see the User's Manual of the appropriate fieldbus
adapter module.
Fieldbus references
References (FBA REF) are 16/32-bit signed integers. A negative reference is formed
by calculating the two's complement from the corresponding positive reference
value. The contents of each reference word can be used as speed or torque
reference.
When torque or speed reference scaling is selected (by parameter
MODESEL
integers. The value consists of a 16-bit integer value and a 16-bit fractional value.
The speed/torque reference scaling is as follows:
Reference
Torque reference
Speed reference
Appendix A – Fieldbus control
(2.12 FBA MAIN CW, page 69) commands the transitions between
/ 50.05 FBA REF2 MODESEL), the fieldbus references are 32-bit
Scaling
FBA REF / 65536
(value in %)
FBA REF / 65536
(value in rpm)
State diagram
(2.13 FBA MAIN
Notes
Final reference is limited by parameters
TORQUE and 20.07 MINIMUM
Final reference is limited by parameters
SPEED, 20.02 MINIMUM SPEED
REFMIN ABS.
on page 349
SW, page 71) indicates the
50.04 FBA REF1
20.06 MAXIMUM
TORQUE.
20.01 MAXIMUM
and 24.12 SPEED