Appendix A – Fieldbus control
317
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
on page
presents the most important states (including the FBA profile state names). The FBA
Control Word (
, page
) commands the transitions between
these states and the FBA Status Word (
, page
) indicates the
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 (e.g. 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
(indicating reversed direction of rotation) is formed by calculating the two’s
complement from the corresponding positive reference value. The contents of each
reference word can be used as torque or speed reference.
When torque or speed reference scaling is selected (by parameter
FBA REF1
MODESEL /
FBA REF2 MODESEL), the fieldbus references are 32-bit
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
Scaling
Notes
Torque reference
FBA REF / 65536
(value in %)
Final reference is limited by parameters
MAXIMUM
TORQUE and
MINIMUM TORQUE.
Speed reference
FBA REF / 65536
(value in rpm)
Final reference is limited by parameters
MAXIMUM
REFMIN ABS.
Summary of Contents for ACSM1 Series
Page 1: ...ACSM1 Firmware Manual ACSM1 Speed and Torque Control Program...
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Page 12: ...Table of contents 12...
Page 49: ...Drive control and features 49...
Page 282: ...Standard function blocks 282...
Page 306: ...Application program template 306...
Page 312: ...Control chain block diagrams 312...
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