Komatsu 830E-AC Shop Manual page 313

FIGURE 11-3. ORBCOMM ANTENNA
1. Orbcomm Antenna
USING THE VHMS SYSTEM
The primary tool for configuring, downloading, and
viewing VHMS data is the VHMS Technical Analysis
Toolbox software. Use of this software requires:
• A laptop PC running Windows 95/98/2000/ME/
XP operating system
• 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.
NOTE: It is recommended that the engine be OFF
when downloading or
controller.
D11005
2. Magnetic Mount
configuring the VHMS
VHMS COMPONENTS
Turning the VHMS System ON
The VHMS controller is turned on by the truck key
switch (circuit 712). Immediately after receiving input
from the key switch signal, the VHMS controller
begins its power-up initialization sequence. This
sequence takes about three seconds, during which
time red LED digits (4, Figure 11-1) on the top of the
VHMS controller unit will display a circular sequence
of flashing LED segments. The VHMS controller will
not support a connection from a laptop PC or a man-
ual snapshot during this initialization time.
The VHMS controller is connected directly to the bat-
tery circuit which provides a constant 24 volt signal
from the truck batteries. However, the VHMS control-
ler has the ability to turn itself off, and will do so auto-
matically within three minutes after the key switch is
turned off.
The battery disconnect switch, located at the
truck battery box, will remove 24 volt power from
the VHMS controller and cause the VHMS con-
troller to LOSE ALL DATA gathered since the key
switch was last turned ON. DO NOT disconnect
the batteries until the VHMS controller has com-
pleted its shutdown operations and has turned
off its LED digits.
Normal VHMS Operation
The red LED digits on the top of the VHMS controller
indicate the current condition of the VHMS system.
The possible conditions are shown in Table 1.
Table 1: VHMS STATUS
LED DISPLAY
Flashing LED seg- Power-on initialization
ments in circular
sequence
Numeric display, Normal Operation
counting 00 - 99 at
rate of 10 numbers
per second
Flashing Fault Codes Normal operation, but a
fault code is active
NOTE: Only a limited number of fault codes are
displayed on the LED display. Most fault conditions
are recorded internally in the VHMS controller, but
are NOT indicated on the LED digits.
DESCRIPTION
D11-5