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372 Fieldbus control through a fieldbus adapter
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.
The contents of the Control word and the Status word are detailed on pages
and
respectively. The drive states are presented in the state diagram
373
375
(page 376).
Debugging the network words
If parameter
50.12 FBA A debug mode
received from the fieldbus is shown by parameter
the Status word transmitted to the fieldbus network by
This "raw" data is very useful to determine if the fieldbus master is transmitting
the correct data before handing control to the fieldbus network.
References
The references are provided by MPPT and does not depend on any user settings.
For more information on MPPT, see chapter
Actual values
Actual values are 16-bit words containing information on the operation of the
drive. The types of the monitored signals are selected by parameters
and
A actual 1 type
Debugging the network words
If parameter
50.12 FBA A debug mode
the fieldbus are displayed by
value
2.
50.08 FBA A actual 2
50.17 FBA A actual value 1
is set to
[1], the Control word
Fast
50.13 FBA A control
Flow calculation
type.
is set to
[1], the actual values sent to
Fast
word, and
50.16 FBA A status
on page 45.
50.07 FBA
and
50.18 FBA A actual
word.
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