Interference Suppressor Filter Analog Inputs (An.1); Gain Of Input Characteristic (An.3; Analog Inputs; Gain Of Input Characteristic - KEB COMBIVERT F4-F Applications Manual

Functional Description
6.2.3 Interference
Suppressor Filter

Analog Inputs

(An.1)
6.2.4 Gain of Input
Characteristic
(An.3...5, An.9...11)
Chapter Section Page
6 2 6
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 µs, 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.
An.1 Function
0 * 1 no averaging
1
1 * averaging with
1
2 * averaging with
3 * 1 averaging with
1
4 * averaging with
5 averaging with
6 averaging with
7 averaging with
8 averaging with
9 averaging with
10 averaging with
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.
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:
Fig. 6.2.5 Factory setting: no Offset, Gain 1
Date Name: Basis
KEB COMBIVERT F4-F
17.09.98
2
4
8
16
32
64
128
256
512
1024
Out = Gain • (In - Offset X) + Offset Y
Output value (Out)
+100%
-100%
+100%
-100%
Analog In- and Outputs
Updating time
128 µs
256 µs
values
512 µs
values
values 1 ms
values 2 ms
values 4 ms
values 8 ms
values 16 ms
values 32 ms
values 64 ms
values 128 ms
Input value (In)
© KEB Antriebstechnik, 1998
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