Fieldbus control
242
The Control Word and the Status Word
The Control Word (CW) is the principal means of controlling the drive from a fieldbus
system. It is effective when the active control location (EXT1 or EXT2, see
parameters 10.01 and 10.02) is set to COMM.CW, or if Par. 10.07 is set to 1 (with
Generic Drive communication profile only).
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.
The Status Word (SW) is a word containing status information, sent by the drive to
the fieldbus controller.
on page
for information on the composition
of the Control Word and the Status Word.
References
References (REF) are 16-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.
Fieldbus reference selection
Fieldbus reference (called COMM. REF in signal selection contexts) is selected by
setting a Reference selection parameter – 11.03 or 11.06 – to COMM. REFx or FAST
COMM. (With Generic Drive communication profile, fieldbus reference is also
selected when Par. 10.08 is set to 1.)
COMM. REF1 (in 11.03) or COMM. REF2 (in 11.06)
The fieldbus reference is forwarded.
FAST COMM
The fieldbus reference is forwarded. The reference is read every 2 milliseconds if
either of the following conditions is met:
• Control location is
EXT1
, Par. 99.04 MOTOR CTRL MODE is
DTC
• Control location is
EXT2
, Par. 99.04 MOTOR CTRL MODE is
DTC
and a
torque
reference
is used.
In any other event, the fieldbus reference is read every 6 milliseconds.
Reference handling
The control of rotation direction is configured for each control location (EXT1 and
EXT2) using the parameters in group 10. Fieldbus references are bipolar, that is they
can be negative or positive. The following diagrams illustrate how group 10
parameters and the sign of the fieldbus reference interact to produce the reference
REF1/REF2.
Notes:
• With the ABB Drives communication profile, 100% reference is defined with
parameters
(REF1) and
Содержание ACS 800 Series
Страница 1: ...ACS800 Firmware Manual Crane Control Program N697 ...
Страница 4: ......
Страница 26: ...Start up and control through the I O interface 26 ...
Страница 36: ...Quick start up guide 36 ...
Страница 52: ...Control panel 52 ...
Страница 105: ...Program features 105 Figure Control diagram for Shaft synchronisation executed in 20 ms ...
Страница 126: ...Program features 126 The figures below show speed limits according to different load conditions ...
Страница 128: ...Program features 128 ...
Страница 150: ...Application macros control location EXT1 EXT2 150 ...
Страница 228: ...Actual signals and parameters 228 ...
Страница 299: ...Adaptive Programming examples for crane control 299 ...
Страница 305: ...Adaptive Programming examples for crane control 305 ...
Страница 312: ...Adaptive Programming examples for crane control 312 The following figures show the previous example enlarged ...
Страница 314: ...Adaptive Programming examples for crane control 314 The following figures show the previous example enlarged ...
Страница 318: ...Analogue Extension Module 318 ...
Страница 332: ...Additional data actual signals and parameters 332 ...
Страница 333: ...DriveWindow 333 DriveWindow DriveWindow connected to the ACS800 RMIO RDCO board and channel CH3 ...
Страница 334: ...DriveWindow 334 ...
Страница 335: ...Control block diagrams 335 Control block diagrams ...
Страница 336: ...Control block diagrams 336 ...
Страница 337: ...Control block diagrams 337 ...
Страница 338: ...Control block diagrams 338 ...
Страница 340: ...www abb com drives www abb com drivespartners Contact us 3AFE68775230 Rev E EN 2012 09 25 ...