
9. Service functions and error messages
Festo P.BE-CMMP-AS-3A-HW-EN 0708NH
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9.
Service functions and error messages
9.1
Protective and service functions
9.1.1
Overview
The CMMP-AS servo positioning controller has a comprehensive array of sensors that
monitor the controller section, power output stage, motor and external communication to
ensure that they function perfectly. All errors which occur are saved in the internal error
memory. Most errors cause the controller section to deactivate the servo positioning con-
troller and switch off the power output stage. The servo positioning controller can only be
switched on again when the error memory has been cleared by acknowledging the errors,
and the errors have been rectified or are no longer present.
A comprehensive system of sensors and monitoring functions ensure operational reliabil-
ity:
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Measurement of the motor temperature
-
Measurement of the power output stage temperature
-
Earth fault detection (PE)
-
Detection of short-circuits between two motor phases
-
Detection of overvoltages in the intermediate circuit
-
Detection of faults in the internal voltage supply
-
Power supply collapse
If the 24 VDC supply voltage fails, approximately 20 ms remain to (e.g.) save parameters
and shut down the controller in a defined manner.
9.1.2
Overload current and short-circuit monitoring
The overload current and short-circuit monitoring is triggered as soon as the current in the
intermediate circuit exceeds twice 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 and negative reference potential of the intermediate circuit and against PE. If
the error monitor detects overload current, the power output stage shuts down immediately,
guaranteeing that the system is short-circuit proof.
9.1.3
Overvoltage monitoring for the intermediate circuit
The overvoltage monitoring for the intermediate circuit takes effect as soon as the inter-
mediate circuit voltage exceeds the operating voltage range. The power output stage is
then deactivated.
9.1.4
Temperature monitoring for the heat sink
The heat sink temperature of the power output stage is measured with a linear tempera-
ture sensor. The temperature limit varies from device to device. A temperature warning is
triggered at 5°C below the limit value.
Содержание CMMP-AS-C2-3A
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