ABB ACS550-02 User Manual page 89

Group 13: Analog Inputs
This group defines the limits and the filtering for analog inputs.
Code Description
1301 MINIMUM AI1
Defines the minimum value of the analog input.
• Define value as a percent of the full analog signal range. See example below.
• The minimum analog input signal corresponds to 1104
• cannot be greater than
MINIMUM AI
• These parameters (reference and analog min. and max. settings) provide scale and offset adjustment for the
reference.
• See figure at parameter 1104.
Example. To set the minimum analog input value to 4 mA:
• Configure the analog input for 0...20 mA current signal.
• Calculate the minimum (4 mA) as a percent of full range (20 mA) = 4 mA / 20 mA * 100% = 20%
1302 MAXIMUM AI1
Defines the maximum value of the analog input.
• Define value as a percent of the full analog signal range.
• The maximum analog input signal corresponds to 1105
• See figure at parameter 1104.
1303 FILTER AI1
Defines the filter time constant for analog input 1 (
• The filtered signal reaches 63% of a step change within the time
specified.
1304 MINIMUM AI2
Defines the minimum value of the analog input.
• See 1 above.
MINIMUM AI
1305 MAXIMUM AI2
Defines the maximum value of the analog input.
• See 1 above.
MAXIMUM AI
1306 FILTER AI2
Defines the filter time constant for analog input 2 (
• See 1 above.
FILTER AI
1
REF MIN
.
MAXIMUM AI
1
REF MAX
1).
AI
2).
AI
or 1107 2 .
REF MIN
or 1108 2 .
REF MAX
%
100
63
Time constant
87
Unfiltered signal
Filtered signal
t
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