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Group 13: Analogue Inputs
Code Description
1301 MINIMUM AI1
Relative minimum value of AI1 (%). Value corresponds to minimum reference
set by parameter 1104
EXT REF1 MIN or 1107 EXT REF2 MIN.
See Figure 3 on page 51
1302 MAXIMUM AI1
Maximum value of AI1 (%). Value corresponds to maximum reference set by
parameter 1105
EXT REF1 MAX or 1108 EXT REF2 MAX.
See Figure 3 on page 51.
1303 FILTER AI1
Filter time constant for analogue input AI1. As the analogue 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 4 Filter time constant for analogue input AI1.
1304 MINIMUM AI2
Minimum value of AI2 (%). Value corresponds to minimum reference set by
parameter 1104
EXT REF1 MIN or 1107 EXT REF2 MIN.
1305 MAXIMUM AI2
Maximum value of AI2 (%). Value corresponds to maximum reference set by
parameter 1105
EXT REF1 MAX or 1108 EXT REF2 MAX.
1306 FILTER AI2
Filter time constant for AI2. Refer to parameter 1303
FILTER AI1.
63
[%]
100
Time constant
t
Filtered Signal
Unfiltered Signal
Example: To set the minimum allowed analogue 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 analogue
input * 100%
= 4 mA / 20 mA * 100%
= 20%.
Note! In addition to this parameter setting, the analogue input must be
configured for 0-20 mA current signal. Refer to section L, Connection
Examples “Frequency Reference from a Current Source”.
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