ABB ACS 800 Series, Firmware Manual

Page: 218 / 340

Actual signals and parameters
218
96 EXTERNAL AO
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 .
96.01 EXT AO1 PTR Defines the source or constant for value. 1000 =
1 mA
-255.255.31 …
+255.255.31 / C.-
32768 … C.32767 Parameter index or a constant value. See parameter 10.04 for information on
the difference.
-
96.02 INVERT EXT AO1 Activates the inversion of analogue output AO1 of the analogue I/O extension
module.
NO Inactive 0
YES Active. The analogue signal is at a minimum level when the drive signal
indicated is at its maximum and vice versa. 65535
96.03 MINIMUM EXT AO1 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.
0 mA 0 mA 1
4 mA 4 mA 2
10 mA 10 mA 3
12 mA 12 mA 4
96.04 FILTER EXT AO1 Defines the filtering time constant for analogue output AO1 of the analogue I/O
extension module. See parameter
15.04 .
0.00 … 10.00 s Filtering time constant 0 … 1000
96.05 SCALE EXT AO1 Defines the scaling factor for analogue output AO1 of the analogue I/O
extension module. See parameter
15.05 .
10 … 1000% Scaling factor 100 …
10000
Index Name/Selection Description FbEq
-1000
Analogue output
1000
mA
20
0 -500 500
Speed/ rpm
10
12
4
1
2
3
4
0 mA
4 mA
10 mA
12 mA
Analogue output
signal minimum
1
2
3
4
1
2