Installation Manual

Electrical & Electronic Application And Installation Manual
Production Release Version 1.0
Page 185
measuring an engine parameter above the configurable threshold level a
warning is triggered (Event Code), which is logged by the engine ECM and
the appropriate lamp driver is activated.
14.1.1.2 De-rate
Each monitored parameter that uses the derate function has its own derate
trigger threshold and map. If the derate threshold is equaled or exceeded by
any parameter, a derate protection will be set active and the engine will
derate. The ECM will log these events and turn on the appropriate lamp
driver. The level of engine % derate will vary depending upon the parameter
being monitored. A derate is only initialized when a severity level 2 is raised.
14.1.1.3 Shutdown
The engine shutdown indication lamp driver will be triggered when any
parameter equals or exceeds its shutdown threshold for a time exceeding its
shutdown indication guard time. Physical engine shutdown will occur only if
enabled by the configurable parameter. The ECM will log these events and
turn on the appropriate lamp driver. A Shutdown function will only operate
once a severity level 3 is raised.
14.1.2 Parameter Severity Levels
The monitoring system provides up to three possible severity levels for each
of the configurable system parameters. These levels are defined as severity
level 1 (least server), 2 (moderate severity) and 3 (most server). The level of
severity is displayed upon activation of the parameter Event code for example.
Engine coolant temperature severity level 1 is exceeded. Upon activation an
Event code is generated in this case E361-1. The –1 part of the code signals
that a severity level 1 threshold has been exceeded. If a level 2 is raised then
the same event code is raised but with a –2.
The levels available for each parameter are set within software and cannot be
changed. Whilst the number of levels are not configurable each available
level is designed to offer an increased level of action by the engine once a
threshold for the monitored parameter has been set. Some engine
parameters enable the customer to directly configure the thresholds at which
these conditions are activated and others are fixed.
The table below details the Monitoring system parameters that are available
for configuration by the customer. The table is split into two sections, the first
showing those parameters which offer both a threshold configuration and an
engine action configuration, and those which offer an engine action
configuration only.
Monitoring System
Parameters
Configurable
Threshold
Severity Level
Level 1
Level 2
Level 3
Engine Coolant Temperature Yes Yes Yes Yes
Engine Over speed Yes Yes No Yes
Intake Manifold Air
Temperature
Yes Yes Yes No
High EGR Temperature Yes Yes Yes Yes