PEC017
5/3/2018 Page 57 of 105
torque produced; this includes the internal calculated torque from the engine. The
torque transmitted to the driveline will be lower than the programmed value.
When Remote PTO Engine Speed Control is configured with one preprogrammed
preset speed, pressing Remote Set momentarily after entering PTO mode will cause
the engine speed to increase to Remote PTO Preset Engine Speed 1 (N055). This
functionality is not time dependent, and may be triggered at any time after entering
PTO Mode, provided the Remote Set switch is momentarily pressed before any other
input. If Remote Set is pressed a second time, or if any other switch is used first
upon entering PTO mode, the engine will revert to normal PTO operation.
When Remote PTO Speed Control is enabled with two preprogrammed preset
speeds, momentarily pressing Remote Set will cause the engine speed to increase
to Remote PTO Preset Engine Speed 1 (N055). Pressing Remote Set again will
cause the engine speed to increase to Remote PTO Preset Engine Speed 2 (N056).
Subsequent presses of the Remote Set switch will cause the engine speed to
increase beyond the second preset engine speed. Pressing and holding Remote Set
will cause the engine speed to steadily increase by the preprogrammed rate. The
Remote Resume switch functions normally. If it is desirable for the Remote Set
switch to always cause the engine to jump to a single predefined speed, both
Remote PTO Preset Engine Speed 1 (N055) and Remote PTO Preset Engine Speed
2 (N056) may be programmed to the same value.
When programming remote preset engine speeds, ensure that Remote PTO Preset
Engine Speed 1 (N055) is greater than or equal to PTO Mode Minimum Engine
Speed (N106), and Remote PTO Preset Engine Speed 2 (N056) is greater than or
equal to Remote PTO Preset Engine Speed 1 (N055) and less than or equal to
Maximum Engine Speed using Switch Inputs (N086). Figure 12.1 illustrates a
general overview of how specific engine speed parameters must be programmed to
prevent errors from occurring during the programming process within PACCAR
Vehicle Pro. The parameters shown may be programmed to the same value as their
neighboring parameters, but if they are programmed as separate values they must
not deviate from the displayed order from least to greatest value.
Figure 12.2 – PTO Engine Speed Limits and Set Points for Cab PTO
Note: The Remote PTO Preset Engine Speed feature requires the PTO
Preprogrammed Speed Setting functionality to be properly configured as One
Speed or Two Speeds in the CECU software.
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