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3.3
Method of operation
This power amplifier with integrated spool position control is controlled by an analog command signal. The
ENABLE signal activates the power stage and application functionality and the READY output reports an error
free operation.
In case of an error the power stage gets deactivated and the error is reported by a deactivated READY output
and a flashing READY LED.
The output current is closed loop controlled which leads to a high accuracy and a good dynamic.
Superior controller is the spool position controller. It has a feed forward function for fast reactions when the
command value changes and a switching integrator with parameterizable Deadband in order to avoid limit cy-
cling at the operation point.
The output can be adapted to valves with one or two solenoids.
In open loop control mode the power stage can be controlled by the feed forward function which leads the
command value directly to the output. In closed loop control mode the control deviation and parameterizing of
the controller define the output signal.
Page 11 of 33
PAM-198-P
05.06.2020
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