03/12 EM-ABS-01 for ACU 91
8.1.7 Adjustment
Due to component tolerance, it can be necessary to ad
ust the analo
input. This is
done via parameter
Adjustment 568.
Adjustment 568
Function
0 - No adjustment Standard operation
1 - Adjustment 0 V
Adjustment of the measurement with an analog signal
of 0 V.
2 - Adjustment 10 V
Adjustment of the measurement with an analog signal
of 10 V.
Example of the adjustment of an analog input with a voltage signal:
Note: The measurements for the ad
ustment are to be done with a suitable
measuring instrument and the correct polarity.
If not, faulty measurements can result.
• Apply 0 V to the analog input; e.g. with a bridge from the terminal of the ana-
log input X410A.6 to terminal X210B.7 (earth/GND) of the frequency inverter.
• Select operation mode “1 - Adjustment 0 V”.
• Apply 10 V to the analo
input, e.
. with a brid
e from the terminal of the
analog input to terminal X210B.5 (reference output 10 V) of the frequency in-
verter.
• Select operation mode “2 - Ad
ustment 10 V”. This completes the ad
ustment
of the analog input.
8.1.8 Filter time constant
The time constant of the filter for the reference analog value can be set via the para-
meter
Filter time constant 561.
he time constant indicates the time durin
which the input si
nal is avera
ed by
means of a low pass filter, e.g. in order to eliminate fault effects.
The setting range is between 0 ms and 5000 ms in 15 steps.
Filter time constant 561
Function
0 - Time constant 0 ms
Filter deactivated – analog reference value is for-
warded unfiltered
2 - Time constant 2 ms Filter activated – avera
in
of the input si
nal via
the set value of the filter time constants Factory
setting: 8 ms.
4 - Time constant 4 ms
8 - Time constant 8 ms
16 - Time constant 16 ms
32 - Time constant 32 ms
64 - Time constant 64 ms
128 - Time constant 128 ms
256 - Time constant 256 ms
512 - Time constant 512 ms
1000 - Time constant 1000 ms
2000 - Time constant 2000 ms
3000 - Time constant 3000 ms
4000 - Time constant 4000 ms
5000 - Time constant 5000 ms
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