Rev 1.2 Jan.05
21
4
4: Operating the
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Engine on.
is on. (
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MP 555 GPS modem
Modem hardware
Watcher software
Operating the MP 555 GPS modem requires some knowledge
of both the modem hardware and the Watcher software. This
chapter describes the basics of each.
Modem hardware
The MP 555 GPS modem is usually mounted in the trunk or
passenger compartment of a vehicle. You should understand
how the modem is turned on and off and how to read the
indicator lights.
Turning the modem on and off
The way in which the MP 555 GPS is wired determines how it
is powered on and off. In most cases the power supply for the
modem is the vehicle's electrical system and the modem is
powered on and off in one of these ways (see the
MP 555 GPS modem Vehicle Installation Guide
—document
number 2130297—for details):
Accessory on.
The modem is powered when the ignition is
switched to "Accessories". (This allows the modem to be
powered when the engine is off.
—or—
The modem is powered only when the ignition
The modem is only on when the engine is on.
—or—
Separately switched.
The modem is connected to a
separate on/off switch so that it can be turned on and off
independently of the engine and vehicle accessories.
Rather than cutting power to the modem, the ignition key or
power switch allows the modem to perform a controlled
shutdown sequence that avoids data loss. (You can also set the
modem to wait up to 240 minutes after the power switch has
been turned off before it shuts down. See the description of the
Power Off Timer in the Watcher online help for details.)
Summary of Contents for MP555
Page 1: ...Configuration andIntegration Guide MP 555 GPS modem Software Installation 2130304 Rev 1 2 ...
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