ABB ACS800 Series Firmware Manual page 85

No. Name/Value
13.03 SCALE AI1
50...150%
13.04 FILTER AI1 ms
0...10000 ms
13.05 INVERT AI1
NO
YES
13.06 MINIMUM AI2
0 mA
4 mA
TUNED VALUE
TUNE
13.08 SCALE AI2
13.09 FILTER AI2 ms
13.10 INVERT AI2
13.11 MINIMUM AI3
13.13 SCALE AI3
13.14 FILTER AI3 ms
13.15 INVERT AI3
Description
Scales analog input AI1.
Example: The effect on speed reference
REF1 when:
- 11.05 EXT REF MAXIMUM = 1500 rpm
- Actual AI1 value = 4 V (40% of the full
scale value)
- 13.03 SCALE AI = 100%
Scaling range.
Defines the filter time constant for analog input AI1.
%
Unfiltered Signal
63
Filtered Signal
T
Note: The signal is also filtered due to the signal interface hardware
(10 ms time constant). This cannot be changed by any parameter.
Filter time constant.
Activates/deactivates the inversion of the analog input AI1.
No inversion
Inversion active. The maximum value of the analog input signal
corresponds to the minimum reference and vice versa.
Defines the minimum value for analog input AI2. When used as a
reference, the value corresponds to the reference minimum setting.
Zero milliAmps.
Note: The program cannot detect a loss of analog input signal.
Four milliAmps.
The value measured by the tuning function. See selection TUNE.
The value measurement triggering. Procedure:
1. Connect the minimum signal to input.
2. Set the parameter to TUNE.
Note: The readable range in tuning is 0 mA to 20 mA.
See 13.03 SCALE AI1.
See 13.04 FILTER AI1 ms.
See 13.05 INVERT AI1.
See 13.06 MINIMUM AI2.
See 13.03 SCALE AI1.
See 13.04 FILTER AI1 ms.
See 13.05 INVERT AI1.
AI1
10 V
40%
0 V
-t/T
O = I · (1 - e )
I = filter input (step)
O = filter output
t = time
T = filter time constant
t
Actual signals and parameters
73
FbEq
1500 rpm
600 rpm
1 = 1%
1 = 1 ms
0
65535
1
2
3
4
1 = 1%
1 = 1 ms
0 or 65535
1...4
1 = 1%
1 = 1 ms
0 or 65535