DSE Model 5520 Automatic Mains Failure Control and Instrumentation System Operators Manual
5520 OPERATING MANUAL ISSUE 1 04/02/05 AM
8
2.2 AUTOMATIC MODE OF OPERATION
NOTE:- If a digital input configured to panel lock is active, changing module
modes will not be possible. Viewing the instruments
and
i
is NOT affected by
panel lock. If panel lock is active the Panel lock indicator (if configured) illuminates.
This mode is activated by pressing the
pushbutton. An LED indicator beside the
button confirms this action.
Should the mains (utility) supply fall outside the configurable limits for longer than the period of
the mains transient delay timer, the mains (utility) available GREEN indicator LED extinguishes.
Additionally, while in AUTO mode, the remote start input (if configured) is monitored. If active, the
Remote Start Active
indicator (if configured) illuminates.
Whether the start sequence is initiated by mains (utility failure) or by remote start input, the
following sequence is followed :
To allow for short term mains supply transient conditions or false remote start signals, the Start
Delay timer is initiated. After this delay, if the pre-heat output option is selected then the pre-heat
timer is initiated and the corresponding auxiliary output (if configured) will energise.
NOTE:- If the mains supply returns within limits, ( or the Remote Start signal is
removed if the start sequence was initiated by remote start) during the Start Delay
timer, the unit will return to a stand-by state.
After the above delays the
Fuel Solenoid (or enable ECU
output if configured) is energised, then
one second later, the
Starter Motor
is engaged.
NOTE:
-
I
f
t
he
uni
t
has
been
conf
i
gured
f
or
J1939,
compat
i
bl
e
ECU’
s
wi
l
l
recei
ve
the start command via J1939.
The engine is cranked for a pre-set time. If the engine fails to fire during this cranking attempt then
the starter motor is disengaged for the pre-set rest period. Should this sequence continue beyond
the set number of attempts, the start sequence will be terminated and
Fail to Start
fault will be
displayed.
Alarm
Shutdown
Failed to start
When the engine fires, the starter motor is disengaged and locked out at a pre-set frequency
measured from the alternator output. Alternatively a Magnetic Pickup mounted on the flywheel
housing can be used for speed detection (This is selected by PC using the 5xxx series
configuration software). Rising oil pressure can also be used to disconnect the starter motor,
however it cannot be used for underspeed or overspeed detection.
NOTE:- If the unit has been configured for J1939, speed sensing is via J1939.