Service functions and error messages
Page 134
Product Manual „Servo drives ARS 2320, ARS 2340, ARS 2320W, ARS 2360W“
Version 8.0
10.1.3
Overcurrent and short-circuit monitoring
The overcurrent and short-circuit monitoring system responds as soon as the current in the DC bus
exceeds three times the maximum current of the servo drive. It detects short-circuits between two
motor phases and short-circuits at the motor output terminals against the positive and negative
reference potential of the DC bus and against PE. If the error monitoring system detects an
overcurrent, the power output stage will be shut down immediately to guarantee resistance against
short-circuits.
10.1.4
Overvoltage monitoring of the DC bus
The overvoltage monitoring system of the DC bus responds as soon as the DC bus voltage exceeds
the operating voltage range. As a result, the power output stage will be shut down.
10.1.5
Temperature monitoring of the heat sink
The heat sink temperature of the power output stage is measured using a linear temperature sensor.
The temperature limit varies from device to device. About 5°C below the limit, a temperature warning
is issued.
10.1.6
Motor monitoring
The ARS 2300 servo drive has the following protective functions to monitor the motor and the
connected rotary encoder.
Monitoring of the rotary encoder: An error in the rotary encoder shuts down the power output stage. In
the case of resolvers, the trace 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 ARS 2300 servo drive has one digital and one
analogue input for detecting and monitoring the motor temperature. Due to the analogue signal
detection, also non-linear sensors are supported. The following inputs for temperature sensors can be
selected.
At [X6A]: Digital input for PTCs, normally closed contacts and normally open contacts.
At [X2A] and [X2B]: Normally closed contacts and analogue sensors of the KTY range. Other
sensors (NTC, PTC) require corresponding software adaptations.
10.1.7
I²t monitoring
The ARS 2300 servo drive has an I²t monitoring system to limit the average power loss in the power
output stage and 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.
Summary of Contents for ARS 2320
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