ABB ACQ550-x1-06A6-2 - Page 95

ACQ550-U1 User’s Manual 95
Parameters
5 = DI3U,4D(R) – Defines digital inputs as the speed reference source (motor potentiometer control).
• Digital input
DI3 increases the speed (the U stands for “up”).
• Digital input
DI4 decreases the speed (the D stands for “down”).
• A Stop command resets the reference to zero (the
R stands for “reset”).
• Parameter 2205
ACCELER TIME 2 controls the reference signal’s rate of change.
6 =
DI3U,4D – Same as above (DI3U,4D(R)), except:
• A Stop command does not reset the reference to zero. The reference is stored.
• When the drive restarts, the motor ramps up (at the selected acceleration rate) to the stored reference.
7 =
DI5U,6D – Same as above (DI3U,4D), except that DI5 and DI6 are the digital inputs used.
8 =
COMM – Defines the fieldbus as the reference source.
9 =
COMM+AI1 – Defines a fieldbus and analog input 1 (AI1) combination as the reference source. See Analog input
reference correction below.
10 = COMM
*
AI1 – Defines a fieldbus and analog input 1 (AI1) combination as the reference source. See Analog input
reference correction below.
11 =
DI3U,4D(RNC) – Same as DI3U,4D(R) above, except that:
• Changing the control source (
EXT1 to EXT2, EXT2 to EXT1, LOC to REM) does not copy the reference.
12 =
DI3U,4D(NC) – Same as DI3U,4D above, except that:
• Changing the control source (
EXT1 to EXT2, EXT2 to EXT1, LOC to REM) does not copy the reference.
13 =
DI5U,6D(NC) – Same as DI5U,6D above, except that:
• Changing the control source (
EXT1 to EXT2, EXT2 to EXT1, LOC to REM) does not copy the reference.
14 =
AI1+AI2 – Defines an analog input 1 (AI1) and analog input 2 (AI2) combination as the reference source. See
Analog input reference correction below.
15 = AI1
*
AI2 – Defines an analog input 1 (AI1) and analog input 2 (AI2) combination as the reference source. See
Analog input reference correction below.
16 = AI1-AI2 – Defines an analog input 1 (AI1) and analog input 2 (AI2) combination as the reference source. See
Analog input reference correction below.
17 =
AI1/AI2 – Defines an analog input 1 (AI1) and analog input 2 (AI2) combination as the reference source. See
Analog input reference correction below.
20 = KEYPAD(RNC) – Defines the control panel as the reference source.
• A Stop command resets the reference to zero (the
R stands for reset.).
• Changing the control source (
EXT1 to EXT2, EXT2 to EXT1) does not copy the reference.
21 =
KEYPAD(NC) – Defines the control panel as the reference source.
• A Stop command does not reset the reference to zero. The reference is stored.
• Changing the control source (EXT1 to EXT2, EXT2 to EXT1) does not copy the reference.
Analog input reference correction
Parameter values 9, 10 and 14…17 use the formula in the following table.
Where:
• C = Main reference value
( =
COMM for values 9, 10 and
=
AI1 for values 14…17).
• B = Correcting reference
( =
AI1 for values 9, 10 and
=
AI2 for values 14…17).
Example:
The figure shows the reference source curves for value
settings 9, 10 and 14…17, where:
•C = 25%.
• P 4012
SETPOINT MIN = 0.
• P 4013
SETPOINT MAX = 0.
• B varies along the horizontal axis.
Code Description
Value setting Calculation of the AI reference
C + B C value + (B value - 50% of reference value)
C
*
B C value · (B value / 50% of reference value)
C - B (C value + 50% of reference value) - B value
C / B (C value · 50% of reference value) / B value
120
100
80
60
40
20
0
0
100%
9, 14 (+)
16 (-)
10, 15 (
*
)
17 (/)
B