ABB ACS 800 Series, Firmware Manual

Page: 168 / 340

Actual signals and parameters
168
13.03 SCALE AI1 Scales analogue input AI1.
Example: The effect on speed reference REF1 when:
- REF1 source selection (parameter 11.03 ) = AI1
- REF1 maximum value setting (parameter 11.04 ) = 0 rpm
- REF1 maximum value setting (parameter 11.05 ) = 1500 rpm
- Minimum AI1 setting (parameter 13.01 ) = 0 V
- Maximum AI1 setting (parameter 13.02 ) = 10 V
- Actual AI1 value = 4 V (40% of the full scale value)
- AI1 scaling = 100%
0 … 1000% Scaling range 0 … 32767
13.04 FILTER AI1 Defines the filter time constant for analogue input AI1.
Note: The signal is also filtered due to the signal interface hardware (10 ms
time constant). This cannot be changed with any parameter.
0.00 … 10.00 s Filter time constant 0 … 1000
13.05 INVERT AI1 Activates/deactivates the inversion of analogue input AI1.
NO No inversion 0
YES Inversion active. The maximum value of the analogue input signal corresponds
to the minimum reference and vice versa. 65535
13.06 MINIMUM AI2 See parameter 13.01 .
0 mA See parameter 13.01 . 1
4 mA See parameter 13.01 . 2
TUNED VALUE See parameter 13.01 . 3
TUNE See parameter 13.01 . 4
Index Name/Selection Description FbEq
4 V
1500 rpm 10 V
0 V
600 rpm
0 rpm
Speed Ref AI1 V DC
If the actual value of AI1 is
4 V, then the speed reference
will correspond to
(4 / (10-0)*100) = 40% of
1500 rpm which will be
600 rpm.
63
%
100
T
t
Filtered signal
Unfiltered signal
O = I
I = filter input (step)
O = filter output
t = time
T = filter time constant
·
(1 - e
- t /T
)