Paccar MX Series Programming Manual Download

Page: 56 / 105

PEC017
5/3/2018

Page

105

When in PTO Mode, pressing the Set/Accel switch momentarily will cause the engine
speed to increase by

Engine Speed Increase w/ Set/Accel (In-Cab) (

N083

)

. For PTO

Mode configured with remote controls,

Engine Speed Increase w/Set/Accel (Remote)

(

N092

)

should be programmed instead. Each press of the Set/Accel switch will

increase engine speed by this increment, up to the

Maximum Engine Speed using

Switch Inputs (

N086

)

When in PTO Mode, pressing the Resume/Decel switch momentarily will cause the
engine speed to decrease by

Engine Speed Decrease w/ Res/Decel (In-Cab)

(

N082

)

. For PTO Mode configured with remote controls,

Engine Speed Decrease

w/Res/Decel (Remote) (

N090

)

should be programmed instead. Each press of the

Resume/Decel switch will decrease engine speed by this decrement, down to the

PTO Mode Minimum Engine Speed (

N106

)

When in PTO Mode, pressing and holding the Set/Accel switch will cause the engine
speed to increase at the rate of

Engine Speed Ramp-Up w/Set/Accel (In-Cab)

(

N085

until

Maximum Engine Speed using Switch Inputs (

N086

)

has been reached.

For PTO Mode configured with remote controls,

Maximum Engine Speed using

Switch Inputs (

N086

)

should be programmed as the customer’s absolute maximum

engine speed. Pressing and holding the Resume/Decel switch will cause the engine
speed to decrease at the rate of

Engine Speed Ramp-down w/Res/Decel (In-Cab)

(

N084

until the

PTO Mode Minimum Engine Speed (

N106

)

has been reached. For

PTO Mode configured with remote controls,

Engine Speed Ramp-Up w/Set/Accel

(Remote) (

N093

)

and

Engine Speed Ramp-down w/Res/Decel (Remote) (

N091

)

should be programmed instead.

In the event the engine speed request is canceled either manually or by interlock and
the engine returns to PTO mode, the engine can be commanded to return to the
previously stored engine speed by pressing the Resume/Decel switch.

Two methods of engine speed control are available when using the Set/Accel switch,
and are selected using

Engine Speed Capture or Engine Speed Preset w/ Set Switch

(

N110

)



Programmable Preset Engine Speed



Capture and Hold Current Engine Speed

When

Engine Speed Capture or Engine Speed Preset w/ Set Switch (

N110

)

is OFF,

pressing the Set/Accel switch immediately after the engine enters PTO Mode will
cause the engine speed will increase to

PTO Mode Preset Engine Speed (In-Cab)

(

N087

)

When

Engine Speed Capture or Engine Speed Preset w/ Set Switch (

N110

)

is ON,

the programmable preset engine speed functionality is replaced with engine speed
capture functionality. In this configuration the Set/Accel switch may be pressed to
capture and maintain the current engine speed.

PTO Mode Maximum Engine Speed Rate of Change (

N081

)

limits the maximum rate

at which the engine speed increases after a momentary operation of a PTO speed
control switch. This is intended to protect equipment that is sensitive to rapid
changes in engine speed. To utilize this limiter,

Enable PTO Mode Engine Ramp

Rate Limiter (

N109

)

must be enabled.

Maximum Engine Torque in PTO Mode (

N077

)

may be used to limit the torque

produced by the engine while in PTO Mode. The torque value programmed is gross