106 Communication profiles ReferencesReferences are 16-bit signed two's complement integers. Anegative reference indicates a reverse direction of rotation.ABB drives can receive control information from multiple sourcesincluding analogue and digital inputs, the drive control panel and acommunication module (for example, FCAN-01). To have the drivecontrolled through the fieldbus, the module must be defined as thesource for control information, for example, reference.ScalingReferences are scaled as shown below.Note: The values of REF1 MAX and REF2 MAX are set with driveparameters. See the drive manuals for further information.In ACSM1, ACS850 and ACS880 the speed reference (REFx) indecimal (0…20000) corresponds to 0…100% of the speed scalingvalue (as defined with drive parameter, eg, ACS850 parameter19.01 Speed scaling, ACS880 parameter 46.01 Speed scaling).In ACS355, drive parameter REFx MIN may limit the actualminimum reference.Fieldbus DriveREF2: 10000REF1: 200000REF2: -10000REF1: -20000REFx MAX / Speed scaleREFx MIN-(REFx MIN)-(REFx MAX) / Speed scale
