Fieldbus control through a fieldbus adapter 431
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
,
Debugging the network words
If parameter
is set to
, the references received from
the fieldbus are displayed by
and
Scaling of references
The references are scaled as defined by parameters
; which scaling is
in use depends on the setting of
and
.
The scaled references are shown by parameters
.
46.01
(with speed reference)
46.02
(with frequency reference)
0
-20000
20000
Drive
Fieldbus
0
10000
-10000
(with torque reference)
) (with speed reference)
) (with frequency reference)
) (with torque reference)
ACS580 FW.book Page 431 Wednesday, September 21, 2016 9:48 PM
