4 Setpoint
20 Positioner DC 6-06
4.1.2 PWM Setpoint
Two inputs are available for the PWM setpoint. The choice depends on the use and on
the type of stop signal. If no stop signal is connected or if the stop is transmitted to the
control unit with a digital signal (
5.2.1.1 External stop request by a digital input),
then PWM input 1 at Pin 2 and 3 is automatically used.
If the stop has to be received via an analogue input however (
5.2.1.2 External stop
request by an analogue input), then Pin 11 and 12 at PWM input 3 are automatically
available for the PWM setpoint.
If an analogue setpoint is requested and not a PWM setpoint, then Pin 11 is basically
used as digital input 5.
The configuration of the PWM inputs is described in detail in
6.3 Setpoint selection
by PWM input.
The following drawings illustrate the terminal connections
7.3.3 PWM setpoint, stop signal digital, actuator with disc rotor motor
7.3.4 PWM setpoint, stop signal digital, gearless actuator
7.3.5 PWM setpoint, stop signal analogue, actuator with disc rotor motor
7.3.6 PWM setpoint, stop signal analogue, gearless actuator.
4.2 Determining the actuator setpoint
The setpoint generator connected to an analogue or PWM input determines the value of
parameter 2350 FuelSetpoint. This param
eter always has the value range 0..100 %
(
6.2 Setpoint selection and stop request via analogue inputs or
6.3 Setpoint selection
by PWM input).
If the externally connected analogue setpoint generator supplies an inverted signal, this
must be taken into consideration when configuring the analogue input. The voltage and
current values for 0 and 100 % of the setpoint must therefore always be entered in
reference values 1530 FuelSetAna_Ref_0% and 1531 FuelSetAna_Ref_100% whether or
not the physical values are rising or falling (
6.2 Setpoint selection and stop request via
analogue inputs).
The actual actuator setpoint 2330 ActPosSetpoint is determined from Parameter 2350
FuelSetpoint. If the full actuator stroke of 0..100 % is not going to be used, a curve can be
interposed which determines the actuator setpoint from the current filling setpoint. If no
correction curve is used, 2350 FuelSetpoint and 2330 ActPosSetpoint are identical.
7300 FuelToActSetp:f Set filling values of the curve
7315 FuelToActSp:Pos
Actuator setpoints of the curve
4721 FuelToActPosCurveOn
1 = Activation of the curve
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