Installation Manual

Electrical & Electronic Application And Installation Manual
Production Release Version 1.0
Page 218
Operator Communication
Due to the DES feature preventing an engine from automatically shutting
down post ignition key switch OFF, it is important that the machine operator is
made aware that DES is in operation. As shown in figure 16.4 a DES
indicator can be used to alert an operator that DES is active and this indicator
should be wired as shown in figure 16.7. In addition to a wired indicator the
engine ECM also supports the Engine Operating Information J1939 message
as shown in table 16.5.
J1939 PGN
Parameter Number
SPN reference
State
Engine Operating
Information
64914 3543 0000 Stopped
0100 Engine
Running
0101 Cool-down
Table 16.5 Engine Operating Information
PGN 64914 will be transmitted during engine operation to indicate when the
engine is in normal running operation and when DES is activated via the 0101
cool-down state.
Requirements For OEM Controlled DES
In the event of an engine controlled Delayed Engine shutdown being
unacceptable to the specific machine operation, Perkins recommend that a
machine controlled cool down strategy is implemented. The J1939 status
parameter for DPF Outlet Temperature should be used as a trigger for when
the cool down has been completed. The J1939 PGN and SPN details are
shown below.
Parameter
PGN
SPN
Aftertreatment 1 Outlet Gas 2 FDB3 3246
Table 16.6 DPF Outlet Temp J1939 Parameter
Using this message the machine controls should operate as follows;
• Ignition key OFF signal received by machine controller.
• Machine controller maintains Engine ECM ignition signal whilst the
J1939 DPF Out Temp signal is above a defined threshold.
• Message / signal is displayed to operator to indicate that the machine is
in cool down mode.
• DPF Outlet temp falls below the temperature threshold and ignition
signal is removed.
• Engine shuts down and 70sec Purge activity begins (during this time
the battery disconnect switch must not be activated).
Note: For more information on the DPF Outlet Temperature threshold
required for initiation of the customer machine controlled cool down
please contact your Applications Engineer.