Control Word And Status Word; Debugging The Network Words - ABB ACS880 Firmware Manual

732 Fieldbus control through a fieldbus adapter
4) With DeviceNet, the control part is transmitted directly.
5) With DeviceNet, the actual value part is transmitted directly.
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Control word and Status word

The Control word is the principal means for controlling the drive from a fieldbus
system. It is sent by the fieldbus master station to the drive through the adapter
module. The drive switches between its states according to the bit-coded
instructions in the Control word, and returns status information to the master in
the Status word.
For the ABB Drives communication profile, the contents of the Control word and
the Status word are detailed on pages
are presented in the state diagram (page 575).
When a transparent communication profile is selected eg. by parameter group
FBA A settings, the control word received from the PLC is available in
transparent control
drive control through bit pointer parameters. The source of the status word, for
example 6.50 User status word
source.

Debugging the network words

If parameter 50.12 FBA A debug mode
from the fieldbus is shown by parameter
word transmitted to the fieldbus network by
data is very useful to determine if the fieldbus master is transmitting the correct
data before handing control to the fieldbus network.
word. The individual bits of the word can then be used for
1, can be selected in
573 and 574 respectively. The drive states
50.9 FBA A SW transparent
is set to Fast, the Control word received
50.13 FBA A control
50.16 FBA A status
6.3 FBA A
word, and the Status
word. This "raw"
51