6 Inputs and outputs
36
Positioner DC 6-06
Parameterization example 2:
The setpoint generator selects the filling setpoint with a PWM ratio of between
10 % and 90 %. The analogue stop request is needed, so the PWM setpoint is
automatically expected at PWM input 3 on Pins 11 and 12.
Number Parameter
Value
Unit
1504
FuelSetPWMIn3RefLow 10
%
1505
FuelSetPWMIn3RefHigh 90
%
1508
FuelSetPWMIn3_Filter 8
4330
FuelSetpPWMOrAnalog 1
4340 AnaStopRequestUsed
1
6.3.2
Error detection with the PWM inputs
The following error causes are detected at PWM inputs and displayed as an error on the
assigned sensor:
- The PWM signal has failed
- The frequency is 25 % higher than the maximum permitted frequency of 500 Hz. In
this case the PWM input is deactivated to minimise the interrupt load on the control
unit
- The PWM ratio is outside the error limits which correspond to half the
lower reference parameter (parameter from 1500
FuelSetPWMIn1RefLow)
or the
mean between the upper reference parameter (parameter from 1501
FuelSetPWMIn1RefHigh)
and 100 %.
6.4
Actuator position output with analogue output
The current actuator value can be output as a current on the port at Pin 1 and 3 when
4335
ActPosOutPWMOrAnalog
= 0 is set.
Output Use
Name
Terminal
Specification
Analogue output 2
*
Current actuator value
P2
1
, 3
0..22 mA
*
optional PWM output
Table 12: Analogue output
6.4.1
Value range of the analogue output
For the current output it is usually not the maximum output range of approx. 0..22 mA
that is desired but the standard output range of 4..20 mA.
Parameters 1646
CurrentOut_RefLow
and 1647
CurrentOut_RefHigh
are provided for
matching the output range. The value to be entered is directly parameterized in electrical
unit.
Summary of Contents for PANDAROS DC 6-06
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