ABB COMMANDER 300 Programming Manual page 49

4.14 Scale Adjustment Page
The next three parameters are only included if the position feedback facility is selected.
Fb–rSt
no
Fb–OFS
––––
Fb–SPN
––––
Position Feedback Scale Adjustment Reset
Set to and press
YES
offset and span adjustments to their nominal value.
is displayed to indicate that these parameters have been
reset.
Position Feedback Offset Adjustment
Proceed as for
Process Variable Offset Adjustment
and apply the correct input for the spot calibration
required. Ratio and bias settings are ignored.
Set the value required. The decimal point position is set
automatically. For resistance inputs use the external
connections to drive the valve to the fully closed position.
Adjust or to bring the value displayed to that set in
Position Feedback Range Zero
. If this value cannot be reached, adjust the
Feedback Page
value in
Position Feedback Range Zero
within the offset bandwidth of ±10%.
Position Feedback Span Adjustment
Proceed as for
Process Variable Span Adjustment
and apply the correct input for the spot calibration
required. Ratio and bias settings are ignored.
Set the value required. The decimal point position is set
automatically. For resistance inputs use the external
connections to drive the valve to the fully open position.
Adjust or to bring the value displayed to that set in
Position Feedback Range Full Scale
Position Feedback Page
adjust the value in
frame to bring it within the span bandwidth of ±10%.
Return to the top of the
4 CONFIGURATION...
to reset the position feedback
frame in the
frame in the
. If this value cannot be reached,
Position Feedback Range Full Scale
Scale Adjustment Page
dONE
frame
Set Up Position
frame to bring it
frame
Set Up
.
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