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6
6
Name: Basis
KEB COMBIVERT F4-F
17.09.98
Functional Description
Analog In- and Outputs
Chapter
Section
Page
Date
©
KEB Antriebstechnik, 1998
All Rights reserved
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The interference suppressor filter shall suppress disturbances and ripple contents of
the input signals. Parameter An.1 = 0 means that the interference suppressor filter is
deactivated, i.e. the analog inputs are queried every 128
µ
s, the value registered at
that time is passed on.
With An.1 = 1...8 the number of queried measuring values, which are used for
averaging, are adjusted. Proportional to the adjusted number of measuring values
the averaging time increases.
6.2.3
Interference
Suppressor Filter
Analog Inputs
(An.1)
*
1)
If the direct analog setpoint setting is active (parameter SP.0 = 18) then only the
values 0...4 are applicable for parameter An.1. When adjusting higher values
(An.1 = 5...8) the internal calculation is done with the value of An.1 = 4.
6.2.4
Gain of Input
Characteristic
(An.3...5, An.9...11)
As shown in Fig. 6.2.1 the characteristic amplifiers follow upon the interference
suppressor filter. With these parameters the input signals can be adapted to the
requirements in X- and Y-direction as well as in gain. With factory setting no zero
offset is adjusted and the gain is 1, i.e. the input value corresponds to the output
value (see Fig. 6.2.5).
The output value is calculated according to following formula:
Out = Gain • (In - Offset X) + Offset Y
Input value (In)
Output value (Out)
Fig. 6.2.5
Factory setting: no Offset, Gain 1
An.1
Function
Updating time
0 *
1
no averaging
128
µ
s
1 *
1
averaging with
2
values
256
µ
s
2 *
1
averaging with
4
values
512
µ
s
3 *
1
averaging with
8
values
1
ms
4 *
1
averaging with
16
values
2
ms
5
averaging with
32
values
4
ms
6
averaging with
64
values
8
ms
7
averaging with
128
values
16
ms
8
averaging with
256
values
32
ms
9
averaging with
512
values
64
ms
10
averaging with
1024
values
128
ms