Komatsu 830E-AC Shop Manual page 314

Turning the VHMS System OFF
The VHMS controller is connected directly to the
truck batteries, but will remain in normal operation
only if the truck key switch input (circuit 712) is on.
When the VHMS controller senses that the truck key
switch has been turned off, it finishes its internal pro-
cessing and then saves recent data into permanent
memory. This process can take up to three minutes.
If 24 volt power is removed from the VHMS controller
before it has time to save data to permanent mem-
ory, data loss or corruption may occur.
The VHMS controller will turn off the red LED digits
when it is off.
Do not remove 24 volt power from the VHMS con-
troller unless the red LED digits on the VHMS
controller are off!
D11-6
Downloading from the VHMS Controller
Downloading data requires a laptop PC running Win-
dows 95/98/2000/ME/XP operating system, the
VHMS Technical Analysis Toolbox software, and a
serial cable to connect the laptop PC to the VHMS
controller. Refer to the VHMS Technical Analysis
Tool Box instruction manual for additional information
about using this software.
When a download to a laptop PC is performed, cer-
tain files are generated to store data. A listing of the
file types and data is shown in Table 2.
VHMS diagnostic port (2, Figure 11-4), located on
the D.I.D. panel at the rear of the operator cab, is
used to download from the VHMS controller.
FIGURE 11-4. DIAGNOSTIC PORTS
VHMS COMPONENTS
1. IM Diagnostic Port
2. VHMS Diagnostic Port
D11005