13 Error Handling
KRONOS 20
55
13.3
Error Memories
When the control is powered down it will lose any existing information on actual errors. In
order to be able to check upon which errors have occurred, a permanent error memory has
been incorporated in the control. Any errors that have occurred at least once will be stored
there, the order and the time of their occurrence, however, will be ignored.
For every error the extended error memory of the KRONOS 20 stores the number of occur-
rence since last reset. Further the the date of the first and the last occurrence of the error is
stored in the control unit. The date is related to the operating hour meter which represents
the engine running time
3871
OperatingHourMeter
hours of engine-hour indicator and
3872
OperatingSecondMeter
seconds of engine-hour indicator
An error occuring from time to time and disappearing immediately will be recorded in the
control unit only once per second. For that the engine must be running otherwise the sec-
onds of the operating hour meter are not changing.
In addition to the time of occurring of a failure further values will be recorded as failure
condition data. As a standard the following four measurements at the time of occurring the
failure will be stored
2000
Speed
Current speed value
2302
StepperPos
Position of stepper motor
2912
ManifoldPressure
Manifold
pressure
2913
ManifoldTemp
Manifold
temperature
The failure condition data can be parametrised. Find further information in the documenta-
tion of the Windows
®
-Programms DcDesk 2000.
The status of the permanent error counter can be seen from the parameter numbers
3101..3194. The corresponding error counter parameter to each failure is defined as failure
parameter 100. The related time stamp and failure condition data can be read out
only by special commands of the diagnisis tool DcDesk 2000 or the hand programmer.
The permanent error memory can be cleared by means of the PC or the Hand Programmer
only. After clearance, the control will revert to accumulating any occurring errors in the
empty error memory.
When the parameter 5100 NoStoreSerrOn is set to “1” and the error memory
is then cleared, no errors will be stored in the error memory before the next re-
set of the control unit. This feature is to provide the possibility of shipping a
control with customer specific data in an error-free state without having to
stimulate the inputs with the correct values. The parameter 5100 itself cannot
be stored.
Note
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