OM3217 Operating Instructions - Section 32 Page 32-23 VEHICLE HEALTH MONITORING SYSTEM (VHMS) Operation This system uses the VHMS controller (2, Figure 32- 10) to gather data about the operation of the truck from sensors and other controllers installed on the truck. The data stored in the VHMS controller is collected by personal computer or transmitted directly by communi- cations satellite (utilizing the Orbcomm controller). This data is then compiled at the Komatsu computer server. Based on this information, the servicing Komatsu dis- tributor will suggest improvements and provide infor- mation aimed at reducing machine repair costs and downtime.
When the data-store button is pressed on the back side of the center console, it will store a “snap-shot” of the Statex III drive system. It will also trigger the VHMS system to store a “snap-shot” of the truck operating system. A blue light (4, Figure 32-10) will stay illumi- nated while the VHMS system is recording the “snap- shot”. The VHMS system is turned ON by the truck keyswitch. Immediately after receiving 24V power from the key- switch, the VHMS controller begins the power-up ini- tialization sequence. This sequence takes about 3 seconds, during which time the red LED digits (3) near the top of the controller will display a circular sequence of flashing LED segments.
During normal truck operation, the red LED digits on the VHMS controller will count from 1-99 continuously. When the keyswitch is turned OFF, the VHMS control- ler will remain ON while it finishes processing internal data and saves the recent data into permanent mem- ory. When the data has been safely stored, the two digit LED display will turn OFF. This process could take up to three minutes to complete. If 24V power is disconnected (using the battery dis- connect switches) from the VHMS controller before it has completed it’s shut down procedure, the VHMS controller will lose all data gathered since the keyswitch was last turned ON.
Do not discon- nect battery power until the VHMS controller has completed the shutdown procedure and has turned the LED digits off. The Orbcomm controller transmits data through the antenna (1, Figure 32-11) mounted on top of the cab. The antenna coaxial cable is routed through a protec- tive tube structure (2) to protect it from damage. If the antenna or coaxial cable is damaged, replace the parts. FIGURE 32-11. ORBCOMM ANTENNA 1. Orbcomm Antenna 2. Tube Structure FIGURE 32-10. VHMS COMPONENT LOCATION 1. Orbcomm Controller 3. LED Digits 2. VHMS Controller 4. Snapshot Light 5. VHMS Download Port