Komatsu 830E, Shop Manual

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E2-48 Electrical Propulsion Components 2/02 E02016
STATISTICAL DATA CODES - COUNTERS
The Statistical Data Collector uses Parameter
Counters and Parameter Profiles to record operating
conditions for various occurrences on the truck.
To make data most useful, there are four counters for
every statistical counter and five for every statistical
profile. These counts are named by the method used to
reset the count to zero. For the counter, there is a life-
time count, “LCount”, which is associated with its date,
“LCount Start”. Then there are three other counters,
“Last Qtr”, “This Qtr”, and “This Day”.
A “parameter” is a defined occurrence. Each parameter
has an identification number called “Par #”, and a short
name called “Description”. Each parameter is an occur-
rence that is counted in some unit such as hours or the
number of times the conditions have been correct to
declare that the occurrence happened.
The units for which the counters count is listed under
“Units” in Table III. The tables contain additional expla-
nation of the conditions which define a statistical
parameter as having occurred. This column is entitled
“Count Conditions”.
There are two types of parameters; Counter (Table III,
and Profile (Table IV). The profile parameters have one
more characteristic, “Range Counted”, which sorts the
actual value of the parameter and then counts time of
the parameter-at-the-value.
When examining the number of counts for a parameter,
it is often useful to know over what period of time the
counts occurred. To aid in determining how long it took
to get a certain number of counts for a Statistical Data
Counter parameter, the Statistical Data is presented in
the form of four counters. The first counter, “LCount,
indicates how many counts have occurred since the
“LCount Start” date. This is intended to be lifetime
counter. It can be reset to zero by a privileged user,
and the “LCount Start” will automatically be set to the
date on the CPU board when the user performed the
reset.
The second counter, “Last Qtr” is just the total number
of counts for the parameter over the last-fiscal-quarter,
also known as the last-three-months. This counter has
the same value in it all quarter long. At midnight on a
quarter change, this counter is overwritten by the “This
Qtr” value as this-quarter becomes last-quarter.
The third counter, “This Qtr”, keeps a moment by
moment count of occurrences of the parameter. The
counts are not reset to zero until midnight of the next
quarter.
The fourth counter, “This Day”, keeps a moment by
moment count of occurrences of the parameter just as
“This Qtr”, except the “This Day ” count is reset to zero
every midnight whether it is a quarter change or not.
If the GE control panel is shut off before midnight, any
necessary resetting of counters is done when the panel
next powers up after midnight.
Whenever the truck is programmed, that is, the CPU
Card has the contents of the flash proms changed, the
“LCount”, “Last Qtr”, and “This Qtr” counts are not
changed. However, the “This Day” count will be reset
to zero.
In order to use the Statistical Data Collector to monitor
maintenance of the vehicle, it is recommended that an
office spread sheet or data base computer program be
used to keep quarterly records of the statistical data.
To aid in getting the data off the CPU card and into the
office computer, a feature called UPLOAD STATISTI-
CAL DATA TO A FILE has been provided in the PTU.
This feature puts all the collected statistical data in an
ASCII file which can then be processed in the office to
keep records on truck use. The [F2] feature of the PTU
can be used to capture statistical data playback on the
PTU in the office.
NOTE:The Statistical Data Collector is a part of the
program run by the CPU card. If the CPU card does not
have power, or if the code is stopped (as when looking
at event and statistical data via the (PTU), then the
Statistical Data Collector is also stopped. Hence, the
Statistical Data Collector cannot count occurrences of,
for example, toggling the AS pedal, while the code is
stopped.
Also note that the Statistical Data Collector is initialized
at power-up. The counter conditions are initialized to
their respective inactive states, usually false. If, again
for example, the AS pedal is depressed while power is
cycled, then the Statistical Data Collector will be initial-
ized to AS not depressed at power-up. Momentarily
after power-up however, the Statistical Data Collector
will detect that AS is depressed and increment the
count. Thus, cycling power has resulted in the Statisti-
cal Data Collector counting an occurrence of AS
depressed even though AS has been depressed for
some time and has not really been released and
depressed again.