6 Inputs and outputs
Positioner DC 6-06
33
Parameterization example
The setpoint generator is connected to analogue input 3 as a current signal. It has
an inverter measurement range of 20 to 4 mA corresponding to 0 to 100 %.
Parameter 3531
FuelSetpAna_Value
shows the current measured value in mA and
Parameter 3530
FuelSetpAna_Percent
shows the measured value as a percentage.
The resulting 2350
FuelSetpoint
takes error handling into account.
Number Parameter
Value
Unit
1530
FuelSetAna_Ref_0%
20
mA
1531
FuelSetAna_Ref_100% 4
mA
4330
FuelSetpPWMOrAnalog 0
6.2.2
Filtering the analogue inputs
The measured value of the analogue input can be filtered with a digital filter. The
relevant parameters are on numbers 1514
AnaStop_Filter
or 1534
FuelSetAna_Filter
.
A filter value between 1 and 255 is entered in these parameters. A value of 1 means no
filtering. The following formula applies
=
5
.
62
_
value
Filter
[s].
A filter value of 8 must be used for normally fast sensor changes. The time constant for
filtering should be approximately the same as the time constant of the setpoint
generator/sensor.
Parameterization example:
Number Parameter
Value
Unit
1534
FuelSetAna_Filter
8
Time constant
=
5
.
62
8
[s] = 0.128 s
6.2.3
Error detection with the analogue inputs
If a setpoint generator/sensor fails (e.g. due to short or open circuit), the control unit
measures voltages or currents that are outside the normal measurement range. These
measured values outside the normal measurement range can be defined as an
inadmissible operating range in which the control unit detects a failure of the sensor.
Like the reference values, the error limits are indicated in the electrical unit.
Summary of Contents for PANDAROS DC 6-06
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