Service functions and error messages
Page 106
Product Manual
“Servo drive DIS-2 310/2 FB FS STO“
Version 4.0
10.1.2
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 exceeds two 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 intermediate
circuit 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. In addition, a
short circuit of the braking resistor while the brake chopper is active will also be detected.
I²t current monitoring with a warning of the servo drive:
The DIS-2 310/2 FB FS STO servo
drive 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 is reached, a warning (parameterisable) will be
issued. When 100% is reached, the maximum current will be limited to the rated current.
Check of the current measurement and offset calibration when the power stage is turned
on:
When the power stage is switched on, an automatic offset calibration of the current
measurement will be performed. If the offset is beyond the permissible tolerances, an error will be
generated.
10.1.3
Monitoring of the intermediate circuit voltage
Overvoltage monitoring:
The overvoltage monitoring system of the intermediate circuit responds
as soon as the intermediate circuit voltage exceeds the operating voltage range. As a result, the
power output stage will be switched off.
Undervoltage monitoring:
The system checks whether the intermediate circuit voltage is above a
certain minimum limit (parameterisable).
10.1.4
Logic supply monitoring
24 V overvoltage/undervoltage monitoring:
The supply of the logic component of the DIS-2
310/2 FB FS STO servo drive is monitored. If the power supply of the logic component is too high
or too low, an error message will be issued.
Internal operating voltages:
All of the operating voltages that are generated internally, e.g. the
3.3 V supply of the processor, are monitored.
10.1.5
Monitoring of the heat sink/housing temperature
Shut-down at overtemperature:
The heat sink temperature of the power output stage is
measured with a temperature sensor that is located in the IGBT module. When the temperature
limit is reached, an error message will be issued. In addition, a temperature warning will be issued
when the temperature is approximately 5°C below the limit value.
