Operation
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6.8 AUTOMATIC MODE
NOTE:- If a digital input configured to panel lock is active, changing module modes will
not be possible. Viewing the instruments and event logs is NOT affected by panel lock.
Activate auto mode be pressing the pushbutton. An LED indicator beside the button confirms this
action.
Auto mode will allow the generator to operate fully automatically, starting and stopping as required
with no user intervention.
6.8.1 WAITING IN AUTO MODE
If a starting request is made, the starting sequence will begin.
Starting requests can be from the following sources:
• Mains supply out of limits (DSE7420 only)
• Activation of an auxiliary input that has been configured to remote start on load or remote
start off load.
• Activation of the inbuilt exercise scheduler.
• Instruction from external remote telemetry devices using the RS232 or RS485 interface
6.8.2 STARTING SEQUENCE
To allow for ‘false’ start requests such as mains brownouts, the start delay timer begins. There are
individual start delay timers for each of the different start request types.
Should all start requests be removed during the start delay timer, the unit will return to a stand-by
state.
If a start request is still present at the end of the start delay timer, the fuel relay is energised and the
engine will be cranked.
NOTE:- If the unit has been configured for CAN, compatible ECU’s will receive the start
command via CAN.
If the engine fails to fire during this cranking attempt then the starter motor is disengaged for the
crank rest duration after which the next start attempt begins. Should this sequence continue beyond
the set number of attempts, the start sequence will be terminated and the display shows Fail to Start.
The starter motor is disengaged when the engine fires. Speed detection is factory configured to be
derived from the main alternator output frequency, but can additionally be measured from a Magnetic
Pickup mounted on the flywheel (Selected by PC using the configuration software).
Additionally, rising oil pressure can be used to disconnect the starter motor (but cannot detect
underspeed or overspeed).
NOTE:- If the unit has been configured for CAN, speed sensing is via CAN.
After the starter motor has disengaged, the Safety On timer activates, allowing Oil Pressure, High
Engine Temperature, Under-speed, Charge Fail and any delayed Auxiliary fault inputs to stabilise
without triggering the fault.
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