Motor Power Company DUET_FL 48/10, Руководство пользователя

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Page 105
Error messages/Error table
Error monitoring in the DUET_FL
The DUET_FL servo positioning controller has an extensive sensor system monitoring the operation of
the controller, power output stage, motor and communication with the outside world. Any occurring
errors are stored in an internal error memory.
The main monitoring functions are described in the following chapters.
The reaction to the errors can configured with the help of a comfortable error
management system (see
chapter 6.2 Error management ).
6.1.4 Overcurrent and short-circuit monitoring
 Overcurrent and short-circuit monitoring: The overcurrent and short-circuit monitoring
system responds as soon as the current in the intermediate circuit (DC bus) exceeds two
times the maximum current of the controller. It detects short-circuits between two motor
phases and short-circuits at the motor output terminals against the positive reference potential
of the intermediate circuit (DC bus). If the error monitoring system detects an overcurrent, the
power output stage will be shut down immediately to guarantee resistance against short-
circuits.
 I²t current monitoring with controller warning: The DUET_FL servo positioning controller
has an I²t monitoring system to limit the average power loss in the power output stage. 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.
 Current measurement check and offset calibration when the power stage is turned on:
When the power stage is turned on, an automatic offset calibration of the current
measurement will be performed. If the offset lies beyond the permissible tolerances, an error
will be issued.
DC bus voltage monitoring
 Overvoltage monitoring: The overvoltage monitoring system of the DC bus (intermediate
circuit) responds as soon as the DC bus voltage exceeds the operating voltage range. As a
result, the power output stage will be shut down.
 Undervoltage monitoring: The system checks whether the intermediate circuit voltage (DC
bus voltage) is above a certain minimum limit (see chapter DC bus monitoring ). For
User Manual DUET_FL „DUET_FL 48/10“ Version 1.1 Motor Power Company