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6
Name: Basis
KEB COMBIVERT F4-F
17.09.98
Functional Description Analog In- and Outputs
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© KEB Antriebstechnik, 1998
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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 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.
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 µs
1*
1
averaging with 2 values 256 µs
2*
1
averaging with 4 values 512 µs
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
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