Parker AC890PX Series, Engineering Reference

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D-32
A p p e n d i x D : P r o g r a m m i n g
AC890PX AC Drive
Functional Description
The DISPLAY SCALE blocks are selected in the ACCESS CONTROL and OPERATOR MENU function blocks for use with the Speed Setpoint
and Operator Menu respectively.
For display purposes, the parameter is modified according to the formula chosen:
DISPLAY SCALE 1 settings:
value in function block
displayed value
limited to -100.0 to 100.0
Display Scale 1
4 – [65.01] DECIMAL PLACE –
0
–
[65.02] FORMULA
–
2.00 – [65.03] COEFFICIENT A –
1.00 – [65.04] COEFFICIENT B –
0.00 – [65.05] COEFFICIENT C –
100.00
–
[65.06] HIGH LIMIT
–
-100.00
– [65.07] LOW LIMIT –
– [65.08] UNITS – m/s
4 - DECIMAL PLACE : X.X
0 - FORMULA : A/B * X + C
thus 2/1 * 50.00 + 0 = 100.0
SETPOINT (LOCAL)
100.0 m/s
example =
50.00%
When adjusting parameters, the inverse of the formula is applied to the displayed value:
Æ
DISPLAY SCALE 1 (as above)
limited to -100.0 to 100.0
SETPOINT (LOCAL)
90.0 m/s
value in function block
45.00%
example = 90.0 m/s