Feed-Back Type - CD Automation Revo C 3PH User Manual

16 Feed-back type

The Feed-back type has already configured in line with customer requirements that are defined in the
Order Code. The Order Code is written on the identification label.
However, if you wish to change the Feed-back type you can use the software configurator or the Control
Panel .
Caution: this procedure must be performed only by qualified persons.
The Feed-back type is defined by the parameter Feedback in setup menu .
If the configurable digital input has set like Feed-Back Selection ,it's possible to change the select Feed-
Back with the Voltage Feed-Back (V) simply activating the input.
The feed-back defines the Control Mode. It's possible to have:
 V = Square Voltage feed-back.
2
The input signal is proportional to the output square voltage. This means that input signal becomes a
power demand. The power remains constant if the load impedance doesn't change.
 V = Voltage feed-back.
The input signal is proportional to the output voltage. This means that input signal becomes a voltage
demand. This control mode compensates the voltage fluctuation of the incoming line supply.
 I = Current feed-back.
The input signal is proportional to the current output. This means that input signal becomes a current
demand. This control mode maintain the current also if the load impedance changes.
 P(VxI) = Power feed-back.
The input signal is proportional to the power output. This means that input signal becomes a power
demand. The power remains constant also if voltage and load impedance change. This control mode
is used with silicon carbide elements that change its resistive value with temperature and with age. In
addition it compensates the voltage fluctuation of the incoming line supply.
 I = Square Current feed-back.
2
The input signal is proportional to the output square curren. This means that input signal becomes a
power demand. The power remains constant if the load impedance doesn't change.
 None=No Feedback Open Loop. The input is proportional to the firing angle (
 External=External feed-back (0÷10V, 4÷20mA, 0÷20mA).
The input signal is proportional to an external signal. This means that input signal becomes a demand
to maintain this signal always constant. This control mode is used for example with galvanic systems,
where it's necessary to control the current value through the electrodes.
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User's Manual
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