Reference Handling; Actual Value Scaling - ABB ACS350 User Manual

254

Reference handling

The control of rotation direction is configured for each control location (EXT1 and
EXT2) using the parameters in group
bipolar, i.e. they can be negative or positive. The following diagrams illustrate how
group 10 parameters and the sign of the fieldbus reference interact to produce the
reference REF1/REF2.
Direction determined by the sign of
COMM
par. 10.03
DIRECTION =
FORWARD
Fieldbus
Ref. 1/2
par. 10.03
DIRECTION =
REVERSE
Fieldbus
ref. 1/2
par. 10.03
DIRECTION =
REQUEST
Fieldbus
ref. 1/2

Actual value scaling

The scaling of the integers sent to the master as Actual Values depend on the
selected function. See chapter
Fieldbus control with embedded fieldbus
Resultant
REF1/2
Max.ref.
-100% 100%
-163%
–[Max.ref.]
Resultant
REF1/2
Max.Ref.
-163%
-100% 100%
–[Max.Ref.]
Resultant
REF1/2
Max.ref.
-163%
-100%
100%
–[Max.ref.]
10 START/STOP/DIR. Fieldbus references are
Direction determined by digital command,
e.g. digital input, control panel
Fieldbus
Ref. 1/2
163% -163%
163% -163%
Fieldbus
ref. 1/2
Max.ref.
Fieldbus
ref. 1/2
-100%
-163%
163%
–[Max.ref.]
Actual signals and
Resultant
REF1/2
Max.ref.
-100% 100%
–[Max.ref.]
Resultant
REF1/2
Max.Ref.
-100% 100%
–[Max.Ref.]
Resultant
REF1/2
Direction Command:
FORWARD
100%
163%
Direction Command:
REVERSE
parameters.
163%
163%