ABB ACH580-VCR - Page 189

180 ACH580 E-Clipse bypass and packaged drive user manual
Fieldbus adapter
Reference handling
Use drive parameter 20.21 to control the rotation direction when using FBA A
reference 1, FBA A reference 2, EFB reference 1 or EFB reference 2. The following
diagrams illustrate how parameter 20.21 and the sign of the fieldbus reference
interact to produce Reference values.
Note: Fieldbus references are bipolar; that is, they can be positive or negative.
ABB Drives Profile
Parameter Value Setting Resultant Reference
20.21 Direction 1 (Forward)
20.21 Direction 2 (Reverse)
20.21 Direction 3 (Request)
100%
Max. Ref
-100%
-(Max. Ref.)
Fieldbus
Resultant Ref.
Reference
100%
Max. Ref
-100%
-(Max. Ref.)
Fieldbus
Resultant Ref.
Reference
100%
Max. Ref
-100%
-(Max. Ref.)
Fieldbus
Resultant Ref.
Reference