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References
References are 16-bit words containing a sign bit and a 15-bit integer. A negative
reference (indicating reversed direction of rotation) is formed by calculating the
two’s complement from the corresponding positive reference.
ABB drives can receive control information from multiple sources including analog
and digital inputs, the drive control panel and a fieldbus adapter module. In order
to have the drive controlled through the fieldbus, the module must be defined as
the source for control information such as reference. This is done using the source
selection parameters in groups
,
and
Debugging the network words
If parameter
is set to
, the references received from
the fieldbus are displayed by
and
.
Scaling of references
Note: The scalings described below are for the ABB Drives communication profile.
Fieldbus-specific communication profiles may use different scalings. For more
information, see the manual of the fieldbus adapter
The references are scaled as defined by parameters
...
; which scaling is
in use depends on the setting of
and
.
±
±
Fieldbus
Drive
20000
10000
0
-10000
-20000
46.01 (with speed reference)
46.02 (with frequency reference)
46.03 (with torque reference)
46.04 (with power reference)
0 (with torque or power reference)
(46.06) (with speed reference)
(46.07) (with frequency reference)
-(46.03) (with torque reference)
-(46.04) (with power reference)
-(46.01) (with speed reference)
-(46.02) (with frequency reference)
Fieldbus control through a fieldbus adapter 733
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