DE-3000+ IOI 8-15
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supply OUTPUT #4, the PRE-LUBE output. This allows for the activation of an
electrically controlled pre-lube pump for a programmed time period of 0 to 999
seconds prior to and/or during cranking. The use of an appropriate warning de-
vice which can be used to alert any personnel near the engine of the forthcoming
start attempt is strongly recommended. This warning device (flashing lights or
horn) can be activated by the PRE-LUBE output directly or through the use of
auxiliary relay contacts.
11.4 STATE 2: BEGIN CRANKING
When cranking begins the system is at STATE 2 on the sequence chart. After a
user programmed time delay, adjustable from 0 to 999 seconds and set when
programming the unit; the engine cranking will begin. At the point of cranking,
the Class B and Class C timers begin counting their programmed lock out delay
before arming values. The reason that these counters are not started until this
point in system STATE 2 is to maintain a constant lockout time from engine start
before arming regardless of the time required for cranking. This allows the Class
B and Class C setpoints to behave in the same manner and use the same timer
values for both AUTO START and MANUAL starting sequences. The CRANKING
motor is controlled via power supply OUTPUT #3, which would typically be used
to control a solenoid valve or power relay connected to the starting device.
11.5 STATE 3: PURGE 1 NO FUEL NO IGNITION
As the engine cranking begins, the DE-3000+ system implements the engine
purge cycle. The first engine purge cycle consists of a programmed roll time, 0
to 10 seconds (5 seconds typical), without fuel or ignition.
11.6 STATE 4: PURGE 2 NO FUEL WITH IGNITION
The second engine purge cycle is an additional programmed time from 0 to 10
seconds with the ignition firing and no fuel being supplied while still cranking.
11.7 STATE 5: STARTING FUEL AND IGNITION ON
After a total purge time of ten seconds, both ignition and fuel have been enabled via
outputs #1 and #2 of the power supply module and the engine should begin running.
11.8 STATE 6: ENGINE STARTED
As the engine speed increases, the user programmable CRANK DISCONNECT
speed switch function will automatically disable the starter at the selected RPM
by de-energizing OUTPUT #3. This is the beginning of system STATE 6 on the
sequence chart. If the crank disconnect RPM is not reached within a user pro-
grammed time period after the cranking output is energized (15 to 99 seconds),
an OVERCRANK FAULT will be generated. The OVERCRANK FAULT will turn off
the fuel and ignition and disable the starter until a new AUTO START command
is received returning the system to STATE 0. If the DE-3000+ is set up for Multi-
Start, then a delay timer will begin counting down before another start attempt
is automatically triggered. Pressing any button on the display during the time
between start attempts will cancel Multi-Start, and the DE-3000+ will remain
in a Stop/Fault mode until it is manually restarted.
11.9 STATE 7: ENGINE RUNNING UNLOADED WARMUP
After the engine has started and the cranking device is turned off (system STATE 7
on the sequence chart), the 4-20mA RPM control output to the governor will be at
the IDLE speed value. The RPM control output will stay at the IDLE value until a user-
programmed delay of 0 to 999 minutes as set by the WARM-UP TIMER is completed.
11.10 STATE 8: ENGINE RUNNING PID OUTPUT CONTROL STARTS
After the WARM-UP period ends the sequence begins system STATE 8, the
4-20mA control outputs begin to adjust from their default value according to the
programmed configuration. Since the programmed configuration is determined by
the USER it is not possible to define a particular behavior of the system as normal. A
brief description of a typical application configuration follows, although many other
control schemes are equally valid. Refer to FIG. 1, sequence of operation chart.
WARNING: WHEN PROGRAMMED FOR
MULTI-START, THE DE-3000+ WILL AU-
TOMATICALLY ATTEMPT TO START THE
ENGINE AS MANY AS FOUR TIMES. RE-
STARTS ARE MADE BETWEEN 30 AND
90 SECONDS FOLLOWING AN OVER-
CRANK FAULT. PERSONNEL AROUND
THE ENGINE MUST BE NOTIFIED TO
TAKE THE NECESSARY SAFETY PRE-
CAUTIONS TO AVOID INJURY OR MAL-
FUNCTION.
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