￭ 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 (for example, FSPS-21). To
have the drive controlled through the fieldbus, you must select the module as the source
for control information, for example, reference.
Scaling
References are scaled as shown below.
Note:
The values of REF1 MAX and REF2 MAX are set with drive parameters. See the drive
manuals for further information.
In ACS580 and ACS880, the speed reference (REFx) in decimal (0…20000) corresponds
to 0…100% of the speed scaling value (as defined with a drive parameter).
62 PROFINET IO – Communication profiles
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 (for example, FENA). To have the drive
controlled through the fieldbus, you must select the module as the
source for control information, for example, reference.
Scaling
References are scaled as shown below.
Note: The values of REF1 MAX and REF2 MAX are set with drive
parameters. See the drive manuals for further information.
In ACSM1, ACS850, ACQ810, ACS480, ACS580 and ACS880,
the speed reference (REFx) in decimal (0…20000) corresponds to
0…100% of the speed scaling value (as defined with a drive
parameter).
In ACS355, drive parameter REFx MIN may limit the actual
minimum reference.
DriveFieldbus
REFx MIN
-(REFx MIN)
REFx MAX / Speed scale
-(REFx MAX) / Speed scale
0
REF2: -10000
REF1: -20000
REF2: 10000
REF1: 20000
Scaling_references.pdf
￭ Actual values
Actual values are 16-bit words containing information on the operation of the drive. The
functions to be monitored are selected with a drive parameter.
Scaling
Actual values are scaled as shown below.
Note:
The values of REF1 MAX and REF2 MAX are set with drive parameters. See the drive
manuals for further information.
84 PROFINET IO – Communication profiles
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