Table of Contents
Advertisement
28
Operation Section
Features and Controls
Features and Controls
Monitoring System
The monitoring system is designed to alert the
operator to an immediate problem.
The engine has protection in three stages:
• Warning
• Action Alert
• Shutdown
The engine protection may be overridden by the
critical condition mode.
The Electronic Control Module (ECM) monitors the
following parameters:
• Engine Temperatures
• Engine Pressures
• Engine Speed
If the parameters exceed a trip point for a period that
is longer than the delay period, the ECM logs an
event code. The indicator switches to the ON
position.
The following parameters are monitored for event
codes:
• Lubricating Oil Pressure
• Coolant Temperature
• Overspeed
• Intake Manifold Temperature
• Intake Manifold Pressure
• Fuel Temperature
The temperature protection is disabled for a period
when the engine is cranking in order to compensate
for heat soak solutions.
The ECM has dedicated alarm outputs for each of the
three stages of protection. There are also dedicated
alarm outputs for oil pressure, coolant temperature,
and overspeed events which are energized at any
stage of protection.
Warning Alarm
The Warning alarm informs the user that the engine
is approaching a critical condition.
If the engine is in the Warning condition, then the
event will be logged in the memory of the ECM. An
event code will be transmitted over the Perkins Data
link and the hard wired Warning output will be
i06216788
energized. If the engine is in the Warning condition,
the event code and output will remain while the
condition exists. The electronic service tool is used to
remove the event code from the memory of the ECM.
The trip point for the Warning alarm will be set to a
factory default in production. The electronic service
tool may be used to alter the trip point for a Warning
within predefined limits.
Action Alert
The Action Alert informs the OEM that the engine is
approaching a critical condition. The engine should
be stopped in a controlled manner. Further running of
the engine may result in an immediate shutdown.
If the engine is in the Action Alert condition, the event
will be logged in the memory of the ECM. An event
code will be transmitted over the Perkins Data link
and the hard wired Action Alert will be energized. If
the engine is in the Action Alert condition, the event
code and output will remain while the condition
exists. The event code cannot be cleared from the
memory of the ECM without using a factory
password.
Shutdown
If the engine reaches the Shutdown condition, one of
the following events has occurred: low lubricating oil
pressure, high coolant temperature, or overspeed.
The event will be logged in the memory of the ECM.
The engine will be shut down. An event code will be
transmitted over the Perkins Data link and the hard
wired Shutdown output will be energized. The
Shutdown condition will latch until the ECM is reset.
The event code for the shutdown cannot be cleared
from the memory of the ECM without using a factory
password.
Critical Protection Override
In an application that is critical for safety, the
protection system can be overridden in order to
ensure continued engine operation during fault
conditions.
Critical Protection Override will be set by a switch
input from the OEM. For example, switch to battery +
in order to disable a critical override. Critical
Protection Override input can be enabled in the
electronic service tool by use of a factory password.
M0109073
Advertisement
Table of Contents
