Murphy EMS447 Operation Instructions Manual

EMS447 and EMS448 Models
Operation Instructions Section "2"
Standard Program #01 (A94035) V12 and Later
Caution:
Certain danger to human safety and to equipment
such as applied in mobile or marine application may occur if
some equipment is stopped without prewarning. In those cases
it is recommended that monitored functions be limited to
alarm-only or to alarm before shutdown.
EMS Modes of Operation
The EMS447 and EMS448 monitor your engine/motor conditions and count
down the service reminders. When a shutdown occurs, the fuel valve will turn off
and the display will show the cause of shutdown. TOA switch must be moved to
"OFF" to reset.
The EMS447 and EMS448 have two standard modes of operation which can be
configured in the S-Numbers, these modes of operation are described as follows:
Manual Mode: When this mode is selected, the EMS performs as a
monitoring engine panel. It will alarm when faults are detected and initiate
shutdowns based on shutdown switches and gage senders. It will also remind
you when service is required for your equipment.
Automatic Mode: In the Automatic Mode, two of the shutdown inputs
available in the Manual Mode are redefined. Instead of shutdowns for V-belt
Break and Low Oil Level, automatic throttling inputs are available.
All S-numbers are used and must be configured in the Automatic mode.
Sequence of Operations
Automatic Mode of Operation
(TOA switch is in Auto, see Scrolling Main Displays, 8. Selector, p-2.)
I. A Start Signal is received
a. The start delay begins timing. If the start signal is sustained throughout
this delay, step b. is executed. If the start signal is not sustained throughout
this delay, nothing happens.
b. The prelube/glowplug output turns on throughout the prelube/glowplug delay.
c. The Fuel and Crank outputs turn on. The crank output turns on for the
adjustable crank time. It then turns off for the adjustable rest time. If the
engine starts, step d. is executed. If the engine does not start in the
adjustable number of cranking attempts, the unit will display
OVERCRANK, turn off the fuel and crank outputs, and turn on the common
fail output. If the engine false starts, the unit will wait through the adjustable
recrank delay before attempting another engine crank.
d. When the unit senses an engine RPM higher than the crank stop RPM, the
crank and glowplug outputs turn off and the following begin timing:
1. Internal hourmeter.
2. Lockout Delay. Low Oil Pressure and High Engine Temperature
shutdowns are locked out during this delay.
3. Warm-up Delay.
* e. The unit signals the engine to throttle up to the warm-up RPM.
* f. Once the warm-up delay expires, the EMS signals the engine to throttle up
to Minimum RPM and the clutch output turns on. If the engine throttling
inputs call for an engine increase or decrease, the unit will signal the engine
to respond accordingly.
NOTE: The EMS will always try to throttle the engine between the minimum and
maximum RPM set-points when at the AT-LOAD state.
II. A Stop Signal is received
a. The stop delay begins timing. If the stop signal is sustained through the
stop delay, step b. is executed. If the stop signal is not sustained through
the stop delay, the unit will continue to run.
* When equipped with Murphy AT-67207 or other throttling device.
** When equipped with Murphy CO3 or other clutch operator device.
b. The Cooldown delay begins timing.
* c. The unit signals the engine to throttle down to an idle.
** d. When engine speed reaches the clutch release RPM, the clutch output turns off.
e. When the cooldown delay expires, the following items occur:
1. Fuel valve turns off.
2. Internal hourmeter stops timing.
f. The unit is ready for another start signal. If the TOA switch is moved to the
TEST position, delay on start and stop will be ignored. The unit will start
normally and run through the sequence. When TOA switch is moved to OFF,
the unit will signal the engine to shut down without a cooldown period.
Manual Mode of Operation
In the manual mode, the unit gets its power from the ignition position of the engine
start key switch. The following sequence occurs when the unit first powers up.
I. Power is Supplied to the EMS
a. Fuel valve output turns on.
b. The "Failed To Start" Delay will begin timing (fixed to 5 minutes).
If the engine is not started within 5 minutes, "Failed To Start" is displayed
and the fuel valve is turned off.
c. When the engine speed is sensed to meet or exceed the Crank Stop set-
point, the following delays will begin timing.
1. Internal hourmeter.
2. Lockout Delay. Oil pressure and engine temperature shutdowns are
locked out during this delay. The unit must sense an engine RPM
higher than the crank stop RPM before this delay expires or it will turn
off the fuel valve and show No Speed Signal.
II. Key Switch is turned Off
a. Fuel valve output turns off.
Operating the Interface
By using the three membrane buttons and the liquid crystal display, you can make
set-point changes, acknowledge alarms, and scroll through the display.
The graphic below shows the display and buttons.
DISPLAY WINDOW
ENTER
BUTTON
● The ENTER (EXIT) button is used to confirm a set-point, get into and out of
a display and to acknowledge alarms.
▲ The YES (INCREMENT) button is used to scroll up the display, to select
messages, and enter value increments.
▼ The NO (DECREMENT) button is used to scroll down the display, to select
messages, and enter value decrement.
EMS-94132N page 1 of 12
(power removed from EMS)
®
EMS
Controller
ENTER INCREMENT BACK
NO
YES
EXIT NEXT DECREMENT
YES
BUTTON
EMS-94132N
Revised 6-03
Section 40
(00-02-0201)
SCROLL
TO EXIT
NO
BUTTON