4
Operation principles
The device operation can be best explained with state machine diagram:
•
Relay: state of main relay, on or off
•
Output: state of ECU/PMU output: run or kill
•
Hold: state of internal power supply hold. When hold is off, power save switch will turn device
off immediately.
When the device is turned on, it goes to
ON
state. From that it can be turned off by the power save
switch or emergency switch. Each switch will start an entry procedure which the duration of can be set
by using light client software. It is used to give time for other CAN devices to shut down properly and
for the engine to shut down.
If the device detects that engine is still running it will stay in
LOAD DUMP
state until the engine shuts
down.
When the device is in
OFF
state it can be reset only by toggling the power save switch.
The state of the device is indicated with an LED light in following way:
Device states:
•
green - relay
ON
•
red - relay
OFF
•
toggling green -
POWER SAVE ENTRY PROC
device countdown to Power Save mode
