ABB ACS 400 User Manual page 93

Group 13: Analog Inputs
Code Description
1301 MINIMUM AI1
Relative minimum value of AI1 (%). This value corresponds to the minimum reference set by parameter
1104 1
EXT REF MIN
See Figure 27 on page 80.
1302 MAXIMUM AI1
Maximum value of AI1 (%). This value corresponds to the maximum reference set by parameter 1105
1 or 1108
REF MAX
See Figure 27 on page 80.
1303 FILTER AI1
Filter time constant for analog input AI1. As the analog input value changes, 63 % of the change takes place
within the time specified by this parameter.
Note! Even if you select 0 s for the filter time constant, the signal is still filtered with a time constant of 25 ms
due to the signal interface hardware. This cannot be changed by any parameters.
Figure 28 Filter time constant for analog input AI1.
1304 MINIMUM AI2
Minimum value of AI2 (%). This value corresponds to minimum reference set by parameter 1104
or 1107
MIN EXT REF
1305 MAXIMUM AI2
Maximum value of AI2 (%). This value corresponds to maximum reference set by parameter 1105
or 1108
MAX EXT REF
1306 FILTER AI2
Filter time constant for AI2. Refer to parameter 1303
Example. To set the minimum allowed analog input value to 4 mA, value for parameter 1301
MINIMUM AI1 (1304 MINIMUM AI2) is calculated as follows:
Value (%) = Desired minimum value / Full range of the analog input * 100%
= 4 mA / 20 mA * 100%
= 20%.
Note! In addition to this parameter setting, the analog input must be configured for 0-20 mA current
signal. Refer to section CROSSREF.
82
or 1107 2 . Minimum AI cannot be greater than maximum AI.
EXT REF MIN
2 .
EXT REF MAX
[%]
100
63
2 . Minimum AI cannot be greater than maximum AI.
MIN
2 .
MAX
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Unfiltered signal
Filtered signal
Time constant
1.
FILTER AI
t
ACS 400 User's Manual
EXT
1
EXT REF
1
EXT REF