Installation Manual

Electrical & Electronic Application And Installation Manual
Production Release Version 1.0
Page 145
• Max Wins. The highest speed demand is the one that controls the
engine. This is the default configuration
• Manual Selection switch. A switch input can be used to define which
speed input has control. This is particularly useful in applications where
there are 2 driver seat positions.
• TSC1 override. As described above, the TSC1 message over J1939
will override speed demand from any other source.
• Intermediate engine speed switch. Used as part of the MPTS function
but will override all speed demands when operated including TSC1.
• Lowest wins. In this case the low engine speed demanded will be the
overall speed selected.
11.6.1 Manual Throttle Selection Switch
A switch input is available on pin 66 of the ECM J1 connector, which can be
configured to manually select the active speed demand channel. If the switch
is configured for use (this must be done using the EST service tool), then if
the switch input is open, speed demand 1 is selected. If the switch is closed,
speed demand 2 is selected.
11.7 Acceleration and Deceleration Ramp Rates
It is possible to limit the overall acceleration rate of the engine speed. The
acceleration limit applies to overall engine speed, irrespective of applied
strategy. The rate may be configured using EST. The rate is defined in units of
rpm per second. 0 rpm/s represents no limit to engine acceleration (i.e. turns
off the feature.) The default ramp rate will be 0 rpm/s.
When ramp rates are being used within the PTO function it should be noted
that if overall acceleration and deceleration ramp rates are also being used
the engine software will apply the lower of the two values.
11.8 Throttle Behaviour During Engine Governor Changes
To protect the engine and drivetrain system during engine governor selection
changes, interlocks between engine speed demand and governor mode have
been employed. When changing between governor modes via the mode
switches or J1939 message, the following throttle features are enabled /
disabled.
Governor Mode
PTO Mode
Availability
MPTS Availability
All Speed Governing Yes Yes
Min / Max Governing No No
Table 9.6 Throttle Features and Governor Compatibility
To switch between engine governing modes the actual engine speed must be
returned to its low idle setting under all circumstances. If this condition is not
met then the governor mode will not change regardless of the switched input
state. For more information on engine governing and it’s configuration please
refer to section 16 of this document.