84 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. The ABB Drives profile
references can be found in CoE objects 0x2102 (ABB Drives
REF1) and 0x2103 (ABB Drives REF2).
ABB drives can receive control information from multiple sources
including analog and digital inputs, the drive control panel and the
communication module (for example, FECA-01). To have the drive
controlled through the fieldbus, the adapter module must be
defined 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 and ACS880, the speed reference (REFx) in
decimal (0…20000) corresponds to 0…100% of the speed scaling
value.
Note: 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
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