Motor Power Company DUET_FL 48/10, User Manual

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applications requiring the intermediate circuit to be run "empty" or a set-up mode with a
reduced DC bus voltage (intermediate circuit voltage), the response to this error can be
configured.
Logic supply monitoring
 24V overvoltage / undervoltage monitoring: The power supply of the logic component of
the DUET_FL servo positioning controller is monitored. If the power supply of the logic
component is too high or too low, a fault message will be issued.

Internal operating voltages: All operating voltages generated internally, such as the 3.3 V
supply of the processor, are monitored.
Heat sink temperature monitoring
 Temperature derating: The permissible maximum current will be reduced at high
temperature levels to ensure a long service life of the servo positioning controller.
 Shut-down at overtemperature: The heat sink temperature of the power stage is measured
using a linear temperature sensor. When the temperature limit described in the appendix in
chapter Ambient conditions and qualification is reached, an error message will be issued. In
addition, a temperature warning will be issued when the temperature is about 5°C below the
limit value.
Motor monitoring
 Rotary encoder monitoring: An error in the rotary encoder shuts down the power output
stage. In the case of resolvers, the track signal is measured, for example. In the case of
incremental encoders, the commutation signals are checked. Other "intelligent" encoders have
other means of error detection.
 Motor temperature measurement and monitoring: The DUET_FL servo positioning
controller has an analog input for detecting and monitoring the motor temperature. Due to the
analog signal detection, also non-linear sensors are supported. The shut-down temperature
can be parameterized. Alternatively, the motor temperature can also be monitored with the
help of a normally-closed contact or a PTC. In this case, however, the shut-down threshold
cannot be parameterized.
 I²t current monitoring with motor warning: The DUET_FL servo positioning controller also
has an I²t monitoring system to limit the average power loss in the motor. Since the power loss
in the electronic power system and in the motor increases in a square manner with the current
in the worst case, the squared current value is taken as the measure for the power loss. When
80% of the maximum integrated value are reached, a warning (parameterizable) will be issued.
When 100% is reached, the maximum current will be limited to the rated current.
 Automatic motor identification process monitoring: The system monitors whether the
automatic identification of the phase sequence, the number of pairs of poles and the angle
encoder offset has been performed successfully.
User Manual DUET_FL „DUET_FL 48/10“ Version 1.1 Motor Power Company