ABB Advant Controller 450 User Manual

Advant
®
Controller 450 User’s Guide
Chapter 5 Maintenance
5-78 3BSE 002 415R701 Rev A
Adjustment of the Full-scale Value on the A/D Converter
Perform the adjustment with negative voltage. If negative signals are not used, use a positive
reference voltage. Adjust the reference voltage connected to the negative (or positive) input to
the full-scale value 10 000 mV.
Adjust the potentiometer G while reading the value. The full-scale value (gain) is correctly
adjusted when the unscaled positive value is 32 000
±
8 (negative value 64 768
±
8) for 12-bit
boards and 32 000
±
128 (negative value 64 768
±
128) for 8-bit boards.
The Gain is automatically adjusted on DSAI 133 and DSAX 110 with help of an onboard
voltage reference. However, this voltage reference may be adjusted if necessary with a
potentiometer, R9 on DSAI 133 and R14 on DSAX 110, in the same manner as above.
Adjustment of Symmetry (DSAI 130)
If the full-scale value (gain) is adjusted for negative voltage, you can adjust or check the
symmetry with the help of positive reference voltage. This is performed in the same way as for
full-scale adjustment but with positive voltage and with the potentiometer S.
Resetting - to Stop the GETAB-command
<SHIFT--BREAK> (to conclude the updating)
DV
END.
Adjustment for Boards DSAI 145/146 and DSAI 151
It is easiest to perform the adjustment of the Pt100 temperature board with accurate resistors as
references.
Select an input and corresponding data base element for the adjustment. If you select an unused
input, ensure that ACT is set to 1 and afterward reset to 0.
Select a signal with CONV_PAR=640
°
C or change CONV_PAR in the data base element
selected. Make the updating continuous by setting DEADB=-1 or 0 and FILTER_P = 0 (note
previous values so that they can be reinstated after the adjustment).
Connect a 100 ohm resistor
±
0.01% (0
°
C for Pt 100 transducer) to the selected input on the
connection unit.
Jumper all inputs not used.
Zero Point Adjustment
The Z potentiometer need not be field-adjusted since the software handling of DSAI 145/146
and DSAI 151 has automatic zero adjustment (which offsets any adjustment within 10 seconds).
If the Z potentiometer is not adjusted correctly, it is sufficient to set it to the middle of its range.
If, however, you find a setting where the Fault LED is lit (reference channel error), turn the
potentiometer away from this setting.
Adjustment of Full-Scale Value
Connect a 300 ohm resistor ±0.01% (which corresponds to 558°C for a Pt100 transducer).
Adjust the potentiometer G on the board front at the same time as the value in the data base is
read as it was previously. The full-scale value is adjusted correctly when the VALUE is 558°C.
(Read VALUE continuously using the subcommand GVD.)

ABB Advant Controller 450 Specifications

General

Brand	ABB
Model	Advant Controller 450
Category	Controller
Language	English