KEB Combivert F5 Instruction Manual page 57

Parameter description
LA.03 AN1 zero point hysteresis
Value range
0...±10 %
Zero Point Hysteresis
LA.04 AN1 amplification
Value range
0,00...±20,00
Amplification of´the
analog input signal
Formula for the calculation of
LA.05 AN1 Offset X
Value range
0,0...±100,0 %
Setting Description
0,2 % Through capacitive as well as inductive coupling on the inputs lines or voltage
fluctuations of the signal source, the motor connected to the inverter can drift
(„vibrate"). during standstill in spite of the analog input filter. It is the job of the
zero point hysteresis to suppress this.
The parameter masks out the analog signal in the adjusted value range. The
value applies to both directions of rotation.
If a negative percentage is adjusted, the hysteresis acts in addition to the zero
point also around the current setpoint value. Setpoint changes are accepted
only if they are larger than the adjusted hysteresis.
Fig. LA.03:
Setting Description
1,00 The amplification of the input signal is adjusted with this parameter. At an
amplification of 1.00 the input value corresponds to the output value.
Fig. LA.04:
-100%
the output value
Setting Description
0,0 % The parameter shifts the input characteristic on the X-axis.
for further signal processing
10%
-10%
-10%
output value (Out)
100%
100%
-100%
Out = amplification • ( In - Offset X) + Offset Y
of interference filgter
10%
mask-out
range
input value (In)
GB - 57