ACH550-UH User’s Manual
1-277
Fieldbus adapter
Reference handling
Use group 10 parameters to configure for control of rotation direction for each control
location (
EXT
1 and
EXT
2). The following diagrams illustrate how group 10 parameters
and the sign of the fieldbus reference interact to produce
REFERENCE
values (
REF
1
and
REF
2). Note, fieldbus references are bipolar, that is they can be positive or
negative.
ABB Drives Profile
Parameter
Value Setting
AI Reference Scaling
1003
DIRECTION
1 (
FORWARD
)
1003
DIRECTION
2 (
REVERSE
)
1003
DIRECTION
3 (
REQUEST
)
100%
Max. Ref
-100%
-163%
163%
-(Max. Ref.)
Fieldbus
Resultant Ref.
Reference
100%
Max. Ref
-100%
-163%
163%
-(Max. Ref.)
Fieldbus
Resultant Ref.
Reference
100%
Max. Ref
-100%
-163%
163%
-(Max. Ref.)
Fieldbus
Resultant Ref.
Reference
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