External Ao - ABB ACS800 Firmware Manual

218
Index Name/Selection

96 EXTERNAL AO

96.01 EXT AO1 PTR
-255.255.31 ...
+255.255.31 / C.-
32768 ... C.32767
96.02 INVERT EXT AO1
NO
YES
96.03 MINIMUM EXT AO1
0 mA
4 mA
10 mA
12 mA
96.04 FILTER EXT AO1
0.00 ... 10.00 s
96.05 SCALE EXT AO1
10 ... 1000%
Actual signals and parameters
Description
Output signal selection and processing for the analogue extension module
(optional).
The parameters are visible only when the module is installed and activated
with parameter 98.06.
Defines the source or constant for value.
Parameter index or a constant value. See parameter
the difference.
Activates the inversion of analogue output AO1 of the analogue I/O extension
module.
Inactive
Active. The analogue signal is at a minimum level when the drive signal
indicated is at its maximum and vice versa.
Defines the minimum value for the analogue output AO1 of the analogue I/O
extension module.
Note: Actually, the setting 10 mA or 12 mA does not set the AO1 minimum but
fixes 10/12 mA to actual signal value zero.
Example: Motor speed is read through the analogue output.
- The motor nominal speed is 1000 rpm (parameter 99.08).
- 96.02 is NO.
- 96.05 is 100%.
The analogue output value as a function of the speed is shown below.
Analogue output
4 2
3 1
-1000 -500
0 mA
4 mA
10 mA
12 mA
Defines the filtering time constant for analogue output AO1 of the analogue I/O
extension module. See parameter 15.04.
Filtering time constant
Defines the scaling factor for analogue output AO1 of the analogue I/O
extension module. See parameter 15.05.
Scaling factor
mA
20
12
10
2
4
1
0 500
Speed/rpm
10.04 for information on
Analogue output
signal minimum
1
0 mA
2 4 mA
3
10 mA
4 12 mA
1000
FbEq
1000 =
1 mA
-
0
65535
1
2
3
4
0 ... 1000
100 ...
10000