TUBE 2949820 - Caterpillar

Cumulative - Cumulative information is the number of occurrences (counts) of specific events. An example of cumulative information is total engine revolutions or total fuel consumption over the life of the machine or component. Cumulative information is recorded for a standard set of parameters. The parameters are defined in the configuration software for each machine. The "9.5X" class of source software uses the "configuration type" in order to determine that a new machine's software has been flashed into memory. Stored cumulative information is retained during flashing of 9.5X or later classes of source and configuration software. The on board system collects life-time cumulatives with no need to reset. The situations that will cause an automatic resetting of the cumulatives are listed here:
A new "configuration type" is flashed into the onboard memory. A VIDS 992G configuration that is replaced by a VIMS 992G configuration is a typical example of changing the configuration type.Note: The term configuration type describes the system (VIMS or VIDS) and the model of the machine.
A configuration is loaded with any changes to the methods of calculating and storing cumulative data. The change indicates that a correction has actually been made to the configuration or the VIMS main module has just been installed from a different VIMS application. The new VIMS main module may not recognize the methods of calculating and storing cumulative data that is used by the configuration.
The VIMS internal backup battery is removed while the disconnect switch is in the OPEN position. Resetting of cumulatives manually is not required. If the user desires, the cumulatives may be reset manually. The reset process clears all cumulatives. Because there is only one choice, cumulatives can not be reset individually. If a reset of cumulatives is requested, all the cumulatives will be reset. Cumulatives are accessible only with the service tool.
Table 3
Recommended Service Meter Hour Download and Reset Times for Cumulatives    
On board Software    "OHT"    "LWL"    "LHEX"    
6.8X     Reset before 750 hours (1)     N/A     Reset before 750 hours. (1)    
7.0X     Reset before 750 hours. (1)     N/A     N/A    
9.0X     Reset before 750 hours. (1)     Reset before 750 hours. (1)     N/A    
9.3X     Reset before 750 hours. (1)     Reset before 750 hours. (1)     Reset before 750 hours. (1)    
9.4X     Reset before 750 hours. (1)     Reset before 750 hours. (1)     N/A    
9.5X     No reset is necessary. (2)     No reset is necessary. (2)     No reset is necessary. (2)    
9.6X     No reset is necessary. (2)     No reset is necessary. (2)     N/A    
( 1 ) Cumulative data will begin to saturate at approximately 1000 hours. This means that a maximum number will be reached and then increase no further.
( 2 ) The 9.5Xor later on board software allows for the collection of lifetime cumulative records.Histograms - Histogram information records the history of a parameter since last reset. For