MTU Detroit Diesel 12 V 2000 P62 Technical Publication page 32

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• Coolant level (configurable)
• Charge-air coolant temperature (configurable)
• Coolant temperature (configurable)
• Charge-air temperature (configurable)
• Engine lube oil temperature (configurable)
All safety shutdowns can be suppressed by activating the "Override" input (BE8, default).
The occurrence of safety-relevant alarms is still logged when the "Override" input has been activated.
Fault number 500 is added to the current fault number.
Integral Test System (ITS)
The ITS monitors all important functions of the engine governor and connected electrical components:
• Electronics inside the engine governor itself,
• sensors,
• actuators,
• bus communication,
• power supply.
The ITS detects any faults which occur, pinpoints them and signals accordingly by combined
alarms. Furthermore, a fault message is output via the CAN bus to a higher-level monitoring
system (if applicable) and can visualized there for the operator.
Fault messages are stored in two memories:
• Chronological memory
The fault message numbers are stored in a ring memory in chronological order of their occurrence or cancellation
together with the hour meter reading. The ring memory stores the last 80 setting and cancellation procedures.
• Statistical memory
Fault message occurrences are counted in a statistical memory.
A counter counting up to max. 10 000 is set up for each fault message number .
Monitoring of engine governor electronics
The hardware and software of the engine governor is designed to allow faults in the electronic system to be detected
to enable the operator to respond accordingly to such faults. Fault signals are also forwarded.
The temperature inside the engine governor housing is monitored. Should it rise above a limit value,
a fault signal is output via the combined alarm output and the CAN bus to a higher-level monitoring
system (if applicable) where it can be visualized for the operator.
Monitoring of sensors and actuators
The various sensor and actuator channels of the engine governor system are designed to tolerate
faults to a large extent (e.g. short-circuit withstandability).
Faults such as broken wires, short circuit etc. are detected by plausibility checking and are output to a
higher-level monitoring system (if applicable) in the form of a combined alarm.
Monitoring of bus communication
Bus communication is monitored by plausibility checking and timeout monitoring. Detected faults are output in the
form of a combined alarm and, if possible, to a higher-level monitoring system (if applicable) via the CAN bus.
Overspeed test
Activating this input lowers the overspeed threshold such that the engine shuts down at any speed. This
makes it possible to check that the overspeed shutdown function operates correctly.
MS15009/00E 06-09
Product Summary
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