PTO Configuration TEST

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Testing and AdjustingOn-highway Engines - Electronic PTO Installation and Applications Guide

PTO Configurations - Test

SMCS - 1000-081; 1165-081

The tables that follow list the following information: Sequence of events, Action that is taken by theOperator of the PTO and Position of the controlling equipment. The positions produce the resultantengine RPM within a specific programmed limit. The following components are used in order to providea demonstration of the interaction of different systems: Cruise Control On/Off switch, PTO On/Offswitch, Set/Resume switch, Fast Idle On/Off switch and Accelerator Pedal. Most systems will requireonly some of the components.

Note: (Fast Idle) is not available for the H/D engines.

The Programmable Engine Limits

Note: Before performing each test, reset the parameters to the factory defaults. This will ensure that a

parameter that was used for one test is not active for another test. The parameters that are given in thetables must be programmed in order to perform the tests.

The parameters that are given in Table 1 must be programmed in order to perform the following test.

The tables have the rpm ranges for the Medium DutyEngines M/D ( 3126B, 3126E, C7, and C9). Thetables also have the rpm ranges for the Heavy Duty Engines H/D ( C-10, C11, C-12, C13, 3406E, C15,C-15, C-16, and C-18).

Product: TRUCK ENGINE Previous ScreeModel: 3126E TRUCK ENGINE 9SZConfiguration: 3126E Truck Engine 9SZ00001-UP

Media Number -RENR1282-04 Publication Date -2003/03/01 Date Updated -2003/03/24

i01865476

Table 1

Parameter Programming for the Programmable Engine Limits

"PTO Configuration" Cab Switches

"PTO Top Engine Limit"The PTO Top Engine Limit can be programmed anywhere betweenthe Low Idle Speed and the Top Engine Limit.

2100 rpm2000 rpm H/D

"PTO Cab Throttle RPM Limit" PTO Top Engine Limit

Pgina 1 de 343126E Truck Engine 9SZ00001-UP(SEBP3385 - 05) - Document Structure

10/09/2003https://sis.cat.com/sisweb/servlet/cat.dcs.sis.controller.techdoc.CSSISFormatTechDocFor...


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"Low Idle RPM"700 rpm600 rpm H/D

"Idle RPM Limit" 900 rpm

"Top Engine Limit"

2460 rpm C7, 3126B, and3126E engines

2350 rpm C92120 rpm H/D

"Fast Idle Engine RPM"This option is not used on H/D engines.

1000 rpm

Table 2


Frame 1

Controlling Equipment

Action that wastaken by the

Operator of thePTO

ResultResultant

EngineRPM

The Cruise Control switch is OFF. ThePTO switch is OFF. The Set/Resumeswitch is OFF. The Fast Idle switch isOFF. The Accelerator Pedal is notdepressed.

Park the vehiclewith the engine atidle.

The engine is at theprogrammed lowidle rpm.Programmed lowidle for H/D enginesis 600 rpm.

700 rpm600 rpm H/D

Table 3


Frame 2



Operator of thePTO

ResultResultant

Engine RPM

The Cruise Control switch is OFF.The PTO switch is OFF. TheSet/Resume switch is OFF. TheFast Idle switch is OFF. TheAccelerator Pedal is fullydepressed.

Fully depress theaccelerator pedal.

The engine is limited bythe programmed TopEngine Limit (TEL). TheTEL in this instance is2640 rpm.Programmed TEL for C9engines is 2350 rpm.Programmed TEL for H/D

2640 rpm C7,3126B, and

3126E2350 rpm

C92120 rpm

H/D




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Note: The PTO Top Engine Limit (PTO TEL) can be programmed anywhere between the LowIdle Speed and the Top Engine Limit.

engines is 2120 rpm.

Table 4


Frame 3

Controlling EquipmentAction that was takenby the Operator of the

PTOResult

ResultantEngineRPM

The Cruise Control switch is ON.The PTO switch is OFF. TheSet/Resume switch is in the Setposition. The Fast Idle switch isOFF. The Accelerator Pedal is fullydepressed.

Place the Cruise Controlswitch to the ONposition. Place the

Set/Resume switch tothe Set position.

The engine islimited by theprogrammed TELwhich is 2640 rpm.Programmed TELfor C9 engines is2350 rpm.Programmed TELfor H/D engines is2120 rpm.

2640 rpmC7, 3126B,and 3126E

2350 rpm C9

2120 rpmH/D

Table 5


Frame 4


PTOResult

ResultantEngineRPM

The Cruise Control switch is ON.The PTO switch is OFF. TheSet/Resume switch is OFF. TheFast Idle switch is OFF. The

Accelerator Pedal is released.

Release the AcceleratorPedal. Release theSet/Resume switchfrom the Set position.

The engine is at theprogrammed idleRPM Limit which is900 rpm.

900 rpm

Table 6


Frame 5

Action that




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Controlling Equipmentwas taken bythe Operatorof the PTO

ResultResultant

EngineRPM

The Cruise Control switch isON. The PTO switch is ON.

The Set/Resume switch isOFF. The Fast Idle switch isOFF. The Accelerator Pedal isreleased.

Turn the PTOOn/Off switchto ON.

The engine will return to Low IdleRPM because a PTO rpm has notbeen set. The PTO On/Off switchwill override the Cruise ControlOn/Off switch. The "PTO VehicleSpeed Limit" must be higher thanthe actual vehicle speed.

700 rpm600 rpmH/D

Table 7


Frame 6


PTOResult

ResultantEngineRPM

The Cruise Control switch is ON. ThePTO switch is ON. The Set/Resumeswitch is in the Set position. The FastIdle switch is OFF. The AcceleratorPedal is fully depressed.

Place the Set/Resumeswitch in the Set positionand fully depress theaccelerator pedal.

The engine isat the PTOTEL which is2100 rpm.PTO TEL forH/D engines is2000 rpm.

2100 rpm2000 rpm

H/D

Table 8


Frame 7


Action that was

taken by theOperator of the PTO

Result

Resultant

EngineRPM

The Cruise Control switch is ON. ThePTO switch is ON. The Set/Resumeswitch is OFF. The Fast Idle switch isOFF. The Accelerator Pedal is released.

Release theSet/Resume switch.Release theaccelerator pedal.

The engine willremain at thePTO TEL whichis 2100 rpm.PTO TEL for

2100 rpm2000 rpm

H/D




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Note: (Fast Idle) is not available for the H/D engines.

H/D engines is2000 rpm.

Table 9

The Programmable Engine LimitsFrame 8

Controlling EquipmentAction that was taken bythe Operator of the PTO Result

ResultantEngineRPM

The Cruise Control switch is OFF.The PTO switch is OFF. TheSet/Resume switch is OFF. The FastIdle switch is OFF. The AcceleratorPedal is released.

Turn the Cruise ControlOn/Off switch to the OFFposition. Turn the PTOOn/Off switch to the OFFposition.

The engine willreturn to the lowidle rpm whichis 700 rpm.Low idle rpmfor H/D enginesis 600 rpm.

700 rpm600 rpmH/D

Table 10


Frame 9

Controlling EquipmentAction that was taken by the

Operator of the PTOResult

ResultantEngineRPM

The Cruise Control switch isOFF. The PTO switch is OFF.The Set/Resume switch isOFF. The Fast Idle switch isON. The Accelerator Pedal isreleased.

Turn the Fast Idle switch tothe ON position and thenrelease. The switch willautomatically return to theOFF position when the switchis released.

The engine willaccelerate to theprogrammed FastIdle RPM which is1000 rpm.

1000 rpm

Table 11


Frame 10

Controlling EquipmentAction that was

taken by theOperator of the

Result ResultantEngine




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PTO RPM

The Cruise Control switch is ON. ThePTO switch is OFF. The Set/Resumeswitch is OFF. The Fast Idle switch isOFF. The Accelerator Pedal isreleased.

Turn the CruiseControl On/Offswitch to the ONposition.

The engine remains atthe programmed FastIdle rpm which is 1000rpm.

1000 rpm

Table 12


Frame 11



Operator of thePTO

ResultResultant

EngineRPM

The Cruise Control switch is ON.The PTO switch is ON. TheSet/Resume switch is OFF. TheFast Idle switch is OFF. TheAccelerator Pedal is released.

Turn the PTOOn/Off switchto the ONposition.

The engine returns to theprogrammed Low Idle rpmbecause a PTO rpm has notbeen set. The PTO On/Offswitch will override the FastIdle.

700 rpm

Table 13


Frame 12

Controlling EquipmentAction that was taken by the


ResultantEngineRPM

The Cruise Control switch is ON.The PTO switch is OFF. TheSet/Resume switch is in theRESUME position. The Fast Idleswitch is OFF. The AcceleratorPedal is released.

Turn the PTO On/Off switch tothe OFF position. Turn theSet/Resume switch to theRESUME position. The switchwill release after the RESUMEposition.

The engine willreturn to theIdle RPMLimit that wasset in Frame 4.

900 rpm

Table 14


Frame 13




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"Fast Idle Operation"

Note: The Fast Idle option is not used on all engines.

Table 15 illustrates the engine speed control by using the Fast Idle Enable Switch. The Fast Idle Enable

Switch is a dash mounted switch. The switch is standard in GMC and Chevrolet Medium Duty Trucks.The switch is optional in all other chassis. The "Fast Idle Engine RPM 1" parameter provides one setspeed above Low Idle operation. The "Fast Idle Engine RPM 2" parameter provides an additional setspeed above Low Idle operation.

NOTE: The programmed value for the "Fast Idle Engine RPM 1" can be overridden by using theaccelerator pedal that is in the cab. Once the programmed value is overridden, the new value is useduntil the ignition key is turned OFF. Press the accelerator pedal to the new speed and press the Fast Idleswitch. This will override the "Fast Idle Engine RPM 1". The programmed value for the "Fast IdleEngine RPM 2" can not be overridden.

The parameters that are given in Table 15 must be programmed in order to perform the following test.



Operator of thePTO

ResultResultant

EngineRPM

The Cruise Control switch isON. The PTO switch is OFF.The Set/Resume switch isOFF. The Fast Idle switch isON. The Accelerator Pedal isreleased.

Turn the Fast

Idle switch tothe ON positionand then release.

The engine will accelerate to theprogrammed Fast Idle RPM,which is 1000 rpm. The Fast Idlerpm is set higher than the Idlerpm. The Fast Idle rpm overridesthe Cruise Control.

1000 rpm

Table 15

Parameter Programming for "Fast Idle Operation"

"PTO Configuration" OFF

"Low Idle RPM" 700 rpm

"Fast Idle Engine RPM 1" 1000 rpm

"Fast Idle Engine RPM 2" 1500 rpm

Table 16


Frame 1

Action that was taken Resultant




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Controlling Equipmentby the Operator of the

PTOResult

Engine RPM

The Fast Idle Switch is OFF.The Accelerator Pedal isreleased.

Start the engine.The engine is at theprogrammed low idle of700 rpm.

700 rpm

Table 17


Frame 2

Controlling EquipmentAction that was taken

by the Operator ofthe PTO

ResultResultant

Engine RPM

The Fast Idle Switch isON. The AcceleratorPedal is released.

Turn the Fast Idle

switch to the ONposition and thenrelease.

The engine will ramp up to

1000 rpm, which is theprogrammed Fast Idle EngineRPM 1.

1000 rpm

Table 18


Frame 3

ControllingEquipment

Action that was


ResultResultant

Engine RPM

The Fast Idle Switch isON. The AcceleratorPedal is released.

Turn the Fast Idleswitch to the ONposition and thenrelease.

The engine will then ramp up to1500 rpm. 1500 rpm is theprogrammed Fast Idle EngineRPM 2.

1500 rpm

Table 19


Frame 4


PTOResult

ResultantEngine RPM

The Fast Idle Switch is Turn the Fast Idle switch The engine will return to




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Engine Operation with "PTO Engine RPM Set Speed"The parameter for the "PTO Engine RPM Set Speed" is useful only if one or two specific engine rpmabove low idle is required. Program this parameter to the same value as the "PTO Top Engine Limit" ifONLY one specific engine rpm above low idle is required.

This parameter determines the amount of engine rpm when the PTO On/Off switch is turned to the ONposition. The parameter for the "PTO to Set Speed" must also be programmed to YES. If the "PTO toSet Speed" is programmed to NO, then this speed can be achieved by using the RPM Increase/RPMDecrease switch.

ON. The Accelerator Pedalis released.

to the ON position andthen release.

the programmed Low Idleof 700 rpm.

700 rpm

Table 20

"Fast Idle Operation"Frame 5


Action that was taken by the Operatorof the PTO

ResultResultant

EngineRPM

The Fast IdleSwitch is ON. The

Accelerator Pedalis depressed.

In order to override the programmed"Fast Idle Engine RPM", the acceleratorpedal must be depressed until the desiredrpm is achieved. Quickly toggle the FastIdle Enable Switch to the ON positionand then release. In this example, 1200rpm is used.

The engine will go to1200 rpm. Theprogrammed Fast IdleEngine RPM 1 hasbeen overridden.NOTE: Theprogrammed Fast IdleEngine RPM 2 can notbe overridden.

1200 rpm

Table 21


Frame 6



Operator of thePTO

ResultResultant

Engine RPM

The Fast Idle Switch isOFF. The AcceleratorPedal is released.

Release theaccelerator pedal.

The engine is now at the new FastIdle Engine RPM, which is 1200rpm. 1200 rpm is the temporary"Fast Idle Engine RPM".

1200 rpm




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NOTE: The parameter for the "PTO Engine RPM Set Speed" can override the parameter for the"Idle/PTO Bump RPM". If the "PTO Engine RPM Set Speed" is programmed above 0 rpm, then theSet/Resume switch will function as the RPM Increase/RPM Decrease switch. This occurs when the PTOOn/Off switch is ON.

Example 1 illustrates PTO operation with two specific engine rpm above low idle. Example 1 alsoillustrates the "PTO Engine RPM Set Speed". In this example, the "PTO Engine RPM Set Speed" is for

applications that require engine operation at low idle, at an intermediate rpm, and at the "PTO TopEngine Limit".


Example 2 illustrates PTO operation with one specific engine rpm above low idle.

Example 1

Table 22

Example 1 of the Parameter Programming for the "PTO Engine RPM Set Speed"

"PTO Engine RPM Set Speed" 1500 rpm

"PTO Top Engine Limit"2100 rpm2000 rpm H/D

Table 23

Example 1 of the "PTO Engine RPM Set Speed"

Frame 1


ResultantEngineRPM

The PTO On/Off Switch isON. The RPMIncrease/Decrease switch isOFF.

Turn the PTO On/OffSwitch to the ON positionand leave the throttle atthe low idle position.

The engine will remainat low idle, which is 700rpm. Low idle for H/Dengines is 600 rpm.

700 rpm600 rpm H/D

Table 24


Frame 2

Controlling Equipment Action that was takenby the Operator of

Result ResultantEngine




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the PTO RPM

The PTO On/Off Switchis ON. The RPMIncrease/Decrease switchis set to Increase.

Turn the RPMIncrease/Decreaseswitch to the Increaseposition.

There should be no change inengine rpm. The PTO EngineRPM Set Speed is programmedand the engine will not responduntil the RPM Increase/Decreaseswitch is released.

700 rpm600 rpmH/D

Table 25


Frame 3



ResultResultant

Engine

RPM

The PTO On/Off Switchis ON. The RPMIncrease/Decrease switchis released.

Release the RPMIncrease/Decreaseswitch.

The engine will ramp up to thePTO Engine RPM Set Speedwhich is 1500 rpm. This willhappen only after the RPMIncrease/Decrease switch isreleased.

1500 rpm

Table 26


Frame 4



ResultResultant

EngineRPM




1500 rpm

Table 27


Frame 5




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ResultResultant

EngineRPM



The engine will ramp up to thePTO Top Engine Limit, which is2100 rpm. This will happen onlyafter the RPM Increase/Decreaseswitch is released.The PTO Top Engine Limit is2000 rpm for H/D engines.

2100 rpm2000 rpm

H/D

Table 28


Frame 6



ResultResultant

EngineRPM

The PTO On/Off Switchis ON. The RPMIncrease/Decrease switchis set to Decrease.

Turn the RPMIncrease/Decreaseswitch to the Decreaseposition.


PTO Engine RPM Set Speed is2000 rpm for H/D engines.

2100 rpm2000 rpm

H/D

Table 29


Frame 7


taken by the

Operator of the PTO

ResultResultant

Engine

RPM



The engine will ramp to the PTOEngine RPM Set Speed, which is1500 rpm. This will happen onlyafter the RPM Increase/Decreaseswitch is released.

1500 rpm




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Example 2

Table 30


Frame 8


Action that was taken


Result

Resultant

EngineRPM




1500 rpm

Table 31


Frame 9



ResultResultant

EngineRPM

The PTO On/Off switchis ON. The RPMIncrease/Decrease switchis released.


The engine will ramp to theprogrammed low idle rpm, which

is 700 rpm. This will happen onlyafter the RPM Increase/Decreaseswitch is released.Programmed low idle rpm forH/D engines is 600 rpm.

700 rpm600 rpmH/D

Table 32

Example 2 of the Parameter Programming for the "PTO Engine RPM Set Speed"

"PTO to Set Speed" NO


"PTO Top Engine Limit" 1500 rpm

Table 33




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Frame 1



ResultResultant

Engine RPM

The PTO On/Off Switch is ON.The RPM Increase/Decrease switchis OFF.

Turn the PTO On/OffSwitch to the ONposition.

The engine willremain at low idle,which is 700 rpm.Low idle on H/Dengines is 600 rpm.

700 rpm600 rpm H/D

Table 34


Frame 2



ResultResultant

EngineRPM



There should be no change inengine rpm. The PTO EngineRPM Set Speed is programmedand the engine will not responduntil the RPM Increase/Decrease

switch is released.

700 rpm600 rpmH/D

Table 35


Frame 3



ResultResultant

Engine

RPM



The engine will ramp up to thePTO Engine RPM Set Speed,which is 1500 rpm. This willhappen only after the RPMIncrease/Decrease switch isreleased.

1500 rpm




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Table 36


Frame 4




Result

Resultant

EngineRPM



There should be no change inengine rpm. The PTO EngineRPM Set Speed is programmed.The engine will not respond untilthe RPM Increase/Decreaseswitch is released.

1500 rpm

Table 37


Frame 5



ResultResultant

EngineRPM

The PTO On/Off Switchis ON. The RPM

Increase/Decrease switchis released.

Release the RPM

Increase/Decreaseswitch.

There should be no change inengine rpm. The PTO TopEngine Limit is programmed to

the same rpm as the PTOEngine RPM Set Speed, whichis 1500 rpm.

1500 rpm

Table 38


Frame 6




Result

Resultant

EngineRPM




1500 rpm




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"PTO to Set Speed Engine Operation"

The engine will accelerate to the "PTO Engine RPM Set Speed" when the "PTO to Set Speed" parameteris programmed to YES. The PTO On/Off switch must be ON. This is useful for applications that requireonly one specific engine rpm above low idle. Only one circuit is required.

Table 39


Frame 7


Action that was


Result ResultantEngineRPM



The engine will ramp to theprogrammed low idle rpm, whichis 700 rpm. This will happen onlyafter the RPM Increase/Decreaseswitch is released.Programmed Low idle rpm forH/D engines is 600 rpm.

700 rpm600 rpmH/D

Table 40

Parameter Programming for "PTO to Set Speed Engine Operation"

"PTO to Set Speed" YES


Table 41


Frame 1




Result

Resultant

Engine RPM

The PTO On/Off switch isOFF. The Set/Resume switchis set to OFF.

Start the engine.

The engine is at theprogrammed low idle of700 rpm.Programmed low idlerpm for H/D engines is600 rpm.

700 rpm600 rpm H/D




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Multiple Speed PTO Operation by Using the PTO Engine RPMSet Speed "Input A" and PTO Engine RPM Set Speed "Input B"

JUL99 and Later Personality Modules

The following is for the Medium Duty Engines. 3126B, 3126E, C7, and C9

PTO Engine RPM Set Speed A must be programmed to J1/P1:46 Input 7. PTO Engine RPM Set SpeedB can be programmed to J1/P1:7 Input 4 or J1/P1:23 Input 19. A desired engine rpm can then beprogrammed for each input (PTO Engine RPM Set Speed A and PTO Engine RPM Set Speed B).

The following is for the Heavy Duty Engines. C-10, C11, C-12, C13, 3406E, C15, C-15, C-16, andC-18

PTO Engine RPM Set Speed A or PTO Engine RPM Set Speed B must be programmed to any of thefollowing terminals:

z J1/P1:6

z J1/P1:46

z J1/P1:58

z J1/P1:60

A desired engine rpm can then be programmed for each input (PTO Engine RPM Set Speed A and PTOEngine RPM Set Speed B).

Perform the following functions so that the engine will proceed to the corresponding rpm that isprogrammed for the PTO Engine RPM Set Speed "Input A" or PTO Engine RPM Set Speed "Input B":

z Turn the PTO On/Off Switch to the ON position.

z Turn the switch for the PTO Engine RPM Set Speed "Input A" or the PTO Engine RPM Set Speed

Table 42


Frame 2


Action that was


PTO

Result ResultantEngine RPM

The PTO On/Off Switch isON. The Set/Resume switchis set to OFF.


The engine will ramp to theprogrammed "PTO EngineRPM Set Speed".

1500 rpm




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"Input B" to the ON position.

If both switches are ON, the engine will proceed to PTO Engine RPM Set Speed "A" because the PTOEngine RPM Set Speed "Input A" has priority over "Input B". If switch "A" is then turned OFF, theengine will proceed to the programmed PTO Engine RPM Set Speed "B". If switch "A" is then turnedON, then the engine will proceed back to the PTO Engine RPM Set Speed "A". If both switches are inthe OFF position, then the engine will return to Low Idle.

Example 1

Table 43

Example 1 of the Parameter Programming for the "Multiple Speed PTO Operation" by Usingthe PTO Engine RPM Set Speed "Input A" and PTO Engine RPM Set Speed "Input B"

"PTO Engine RPM Set Speed A" 1500 rpm

"PTO Engine RPM Set Speed B" 1200 rpm

Table 44

Example 1 for the "Multiple Speed PTO Operation" by Using the PTO Engine RPM Set Speed"Input A" and PTO Engine RPM Set Speed "Input B"

Frame 1



Operator of the

PTO

ResultResultant

Engine RPM

The PTO On/Off Switch is OFF. ThePTO Engine RPM Set Speed "A" isOFF. The PTO Engine RPM SetSpeed "B" is OFF.

Start the engine.

The engine is at theprogrammed low idleof 700 rpm.Programmed low idlerpm for H/D enginesis 600 rpm.

700 rpm600 rpm H/D

Table 45


Frame 2



Operator of thePTO

ResultResultant

Engine RPM




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The PTO On/Off Switch is ON. ThePTO Engine RPM Set Speed "A" isOFF. The PTO Engine RPM SetSpeed "B" is OFF.

Turn the PTOOn/Off Switch tothe ON position.

The engine is at theprogrammed low idleof 700 rpm.The programmed lowidle for H/D engines is600 rpm.

700 rpm600 rpm H/D

Table 46


Frame 3


ResultantEngineRPM

The PTO On/Off Switch isON. The PTO Engine RPM SetSpeed "A" is ON. The PTOEngine RPM Set Speed "B" isOFF.

Turn the PTO On/OffSwitch to the ON position.Turn the PTO Engine RPMSet Speed "A" to the ONposition.

The engine is now atthe programmed PTOEngine RPM SetSpeed "A".

1500 rpm

Table 47


Frame 4



Operator of thePTO

ResultResultant

EngineRPM

The PTO On/Off Switch is ON.The PTO Engine RPM Set Speed"A" is ON. The PTO Engine RPM

Set Speed "B" is ON.

Turn the PTOEngine RPM SetSpeed "B" to the ON

position.

The engine will remain atthe programmed PTOEngine RPM Set Speed"A".

NOTE:Set Speed "A"has priority over SetSpeed "B".

1500 rpm

Table 48





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Frame 5



Operator of thePTO

ResultResultant

EngineRPM

The PTO On/Off Switch is ON.The PTO Engine RPM Set Speed"A" is OFF. The PTO EngineRPM Set Speed "B" is ON.

Turn the PTOEngine RPM SetSpeed "A" to theOFF position.

The engine will go to theprogrammed PTOEngine RPM Set Speed"B".

1200 rpm

Table 49


Frame 6



Operator of thePTO

ResultResultant

Engine RPM

The PTO On/Off Switch is ON. ThePTO Engine RPM Set Speed "A" isON. The PTO Engine RPM SetSpeed "B" is ON.

Turn the PTO EngineRPM Set Speed "A"to the ON position.

The engine is atprogrammed PTOEngine RPM Set Speed"A".NOTE: Set Speed"A" has priority overSet Speed "B".

1500 rpm

Table 50


Frame 7


Action that was

taken by theOperator of thePTO

Result

Resultant

Engine RPM

The PTO On/Off Switch is OFF. ThePTO Engine RPM Set Speed "A" isON. The PTO Engine RPM SetSpeed "B" is ON.

Turn the PTOOn/Off Switch tothe OFF position.

The engine is at theprogrammed low idleof 700 rpm.The programmed lowidle for H/D engines is600 rpm.

700 rpm600 rpm H/D




21/34

Example 2

The switches for the PTO Engine RPM Set Speed "A" or "B" can also be used in conjunction with otherfeatures that control engine speed during PTO operation. Set Speed "A" and Set Speed "B" have priorityover all of the other features that are used to adjust engine rpm. Table 52 describes the interactionbetween the parameter for the PTO to Set Speed and the parameter for the PTO Engine RPM Set Speed.The parameter for the PTO to Set Speed is programmed to YES.

Note: The feature for the "PTO Engine RPM Set Speed" is not available for the "Remote Throttle PTO

Configuration". The PTO Engine RPM Set Speed "A" and the PTO Engine RPM Set Speed "B" areavailable for all three PTO configurations.

Table 51


Frame 8



Operator of thePTO

ResultResultant

Engine RPM

The PTO On/Off Switch is ON. ThePTO Engine RPM Set Speed "A" isON. The PTO Engine RPM SetSpeed "B" is ON.


The engine is atprogrammed PTOEngine RPM Set Speed"A".NOTE:Set Speed "A"has priority over SetSpeed "B".

1500 rpm

Table 52

Example 2 for the Parameter Programming for the "Multiple Speed PTO Operation" by Usingthe PTO Engine RPM Set Speed "Input A" and PTO Engine RPM Set Speed "Input B"

"PTO to Set Speed" Yes


PTO Engine RPM Set Speed "A" 1500 rpm

PTO Engine RPM Set Speed "B" 1200 rpm

Table 53





22/34

Frame 1



Operator of thePTO

ResultResultant

Engine RPM


Start the Engine.

The engine is at theprogrammed low idleof 700 rpm.Programmed low idlefor H/D engines is600 rpm.

700 rpm600 rpm H/D

Table 54

Example 2 for the "Multiple Speed PTO Operation" by Using the PTO Engine RPM Set Speed

"Input A" and PTO Engine RPM Set Speed "Input B"

Frame 2



Operator of thePTO

ResultResultant

EngineRPM

The PTO On/Off Switch is ON.The PTO Engine RPM Set Speed"A" is OFF. The PTO Engine RPMSet Speed "B" is OFF.


The engine is at theprogrammed PTO EngineRPM Set Speed of 1000rpm.

1000 rpm

Table 55


Frame 3



Operator of thePTO

ResultResultant

Engine

RPM

The PTO On/Off Switch isON. The PTO Engine RPM SetSpeed "A" is ON. The PTOEngine RPM Set Speed "B" isOFF.

Turn the PTOEngine RPM SetSpeed "A" to theON position.

The engine is now at theprogrammed PTO EngineRPM Set Speed "A".NOTE: Set Speed "A" haspriority over Set Speed "B".Set Speed "A" also haspriority over the PTO to Set

1500 rpm




23/34

Speed.

Table 56

Example 2 for the "Multiple Speed PTO Operation" by Using the PTO Engine RPM Set Speed

"Input A" and PTO Engine RPM Set Speed "Input B"Frame 4



Operator of thePTO

ResultResultant

EngineRPM

The PTO On/Off Switch isON. The PTO Engine RPM

Set Speed "A" is ON. The PTOEngine RPM Set Speed "B" isON.

Turn the PTOEngine RPM SetSpeed "B" to theON position.

The engine will remain at theprogrammed PTO Engine RPMSet Speed "A".NOTE: Set Speed "A" haspriority over Set Speed "B".Set Speed "A" also haspriority over the PTO to SetSpeed.

1500 rpm

Table 57


Frame 5



Operator of thePTO

ResultResultant

EngineRPM

The PTO On/Off Switch is ON.The PTO Engine RPM Set Speed"A" is OFF. The PTO Engine RPMSet Speed "B" is ON.

Turn the PTOEngine RPM SetSpeed "A" to theOFF position.

The engine will go tothe programmed PTOEngine RPM Set Speed"B".NOTE: Set Speed "B"

has priority over thePTO to Set Speed.

1200 rpm

Table 58


Frame 6




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Programmable "Torque Limit"

Programming the parameter for the "Torque Limit" provides an engine torque limit for PTO operation or



Operator of thePTO

ResultResultant

Engine RPM

The PTO On/Off Switch is ON. ThePTO Engine RPM Set Speed "A" isOFF. The PTO Engine RPM SetSpeed "B" is OFF.

Turn the PTO EngineRPM Set Speed "B"to the OFF position.

The engine is atprogrammed PTOEngine RPM SetSpeed.

1000 rpm

Table 59


Frame 7



Operator of thePTO

ResultResultant

Engine RPM


Turn the PTOOn/Off Switch tothe OFF position.

The engine is at theprogrammed low idleof 700 rpm.Programmed low idlefor H/D engines is600 rpm.

700 rpm600 rpm H/D

Table 60


Frame 8


ResultantEngineRPM

The PTO On/Off Switch is ON.The PTO Engine RPM SetSpeed "A" is OFF. The PTOEngine RPM Set Speed "B" isON.

Turn the PTO On/OffSwitch to the ON position.Turn the PTO Engine RPMSet Speed "B" to the ONposition.

The engine is atprogrammed PTOEngine RPM SetSpeed "B".

1200 rpm




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other special situations. This feature should only be used for temporary protection of equipment. Theprogrammable range for this parameter is 136 to 2720 Nm (100 to 2000 lb ft). The range is in 1 Nm (1lb ft) increments. Programming the "Torque Limit" above the rated torque of the engine will not provideadditional torque. The engine will operate using the normal torque curve whenever the normal torque isless than the programmed value of the "Torque Limit".

The tables demonstrate the Torque Limit for the PTO. The tables also demonstrate the "Torque Limit"

when the PTO is OFF. The "Torque Limit" operates when the PTO On/Off switch is ON. When the PTOOn/Off switch is OFF and the Torque Limit Switch is ON, the "Torque Limit" will operate. Refer toElectronic PTO Installation and Applications Guide for Electronic Engines, "Cab Switches with TorqueLimiting and Ignore Brake/Clutch Switch" for more information if the configuration for the PTO isprogrammed to Cab Switches.

Refer to Electronic PTO Installation and Applications Guide for Electronic Engines, "Remote Switcheswith Torque Limiting and Ignore Brake/Clutch Switch" for more information if the configuration for thePTO is programmed to Remote Switches.

The Torque Limit switch should be part of the system that requires the torque limit. Program the

"Torque Limit" to the torque that is rated for the device that is protected by the Torque Limit.

NOTE: The programmed torque level is an estimate. To achieve precise torque limiting, a chassisdynamometer may be required.

Illustration 1 g00621329

(1) Engine Speed (RPM)

(2) Torque

(3) Normal Engine Torque Curve




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Operation of the "Torque Limit" With PTO On/Off Switch

(4) Programmed Torque Limit

Illustration 2 g00621335

(1) Engine Speed (RPM)

(2) Torque

(4) Programmed Torque Limit

Table 61

Parameter Programming

"PTO Configuration" Cab Switches, Remote Switches, or Remote Throttle

"Torque Limit" The value should be below rated torque of the engine.

Table 62


Action that was takenby the Operator of the

PTOResult

The PTO On/OffSwitch is OFF.

Start the engine.The normal engine torque is used. Refer toIllustration 43.

Turn the PTO On/Off The Torque Limit that has been programmed is




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z If "PTO Cab Throttle RPM Limit" is programmed to the "PTO Top Engine Limit", thendepressing the accelerator pedal will allow the engine to reach the programmed "PTO Top EngineLimit". The PTO On/Off circuit must also be in the ON position.

The next three tables describe each of the three options that are for this parameter.

"PTO Cab Throttle RPM Limit" That is Programmed to Low Idle

Table 65

Parameter Programming for "PTO Cab Throttle RPM Limit" That is Programmed to LowIdle



"PTO Cab Throttle Limit" Low Idle

"Top Engine Limit"2640 rpm C7, 3126B, and 3126E2350 rpm C92120 rpm H/D

Table 66


Frame 1



PTO

ResultResultant

Engine RPM

The PTO On/Off Switchis OFF. The AcceleratorPedal is fully depressed.

Fully depress theAccelerator Pedal.

The engine will not exceed theprogrammed Top Engine Limitof 2640 rpm for C7, 3126B, and3216E engines.The Top Engine Limit for C9engines is 2350 rpm.

The Top Engine Limit for H/Dengines is 2120 rpm.

2640 rpm C7,3126B, and

3126E2350 rpm C9

2120 rpm H/D

Table 67


Frame 2




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"Cab Throttle RPM Limit" That is Programmed to The "Top Engine Limit"



PTOResult

ResultantEngine RPM

The PTO On/Off switch is ON.

The Accelerator Pedal is fullydepressed.

Turn the PTO On/Off

Switch to the ONposition.

The engine willreturn to the low idlerpm of 700.Low idle rpm forH/D engines is 600rpm.

700 rpm600 rpm H/D

Table 68

Parameter Programming for "Cab Throttle RPM Limit" That is Programmed to The "TopEngine Limit"



"PTO Cab Throttle Limit" TEL

"Top Engine Limit"

2640 rpm C7, 3216B, and 3126E

2350 rpm C92120 rpm H/D

Table 69


Frame 1


taken by the

Operator of thePTO

ResultResultant

Engine RPM

The PTO On/Off Switchis OFF. The AcceleratorPedal is fully depressed.


The engine will not exceed theProgrammed Top Engine Limitof 2640 rpm for C7, 3126B, and3126E.The Programmed Top EngineLimit for C9 engines is 2350

2640 rpm C7,3126B, and

3126E2350 rpm C9

2120 rpm H/D




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"Cab Throttle RPM Limit" That is Programmed to The "PTO Top Engine Limit"


rpm.Programmed Top Engine Limitof 2120 rpm for H/D engines

Table 70


Frame 2



Operator of thePTO

ResultResultant

Engine RPM

The PTO On/Off Switch isON. The Accelerator Pedalis fully depressed.


The engine will remain atthe Top Engine Limit of2640 rpm for C9, 3126B,and 3126E.2350 rpm for C9The Top Engine limit is2120 rpm for H/D engines.

2640 rpm C7,3126B, and

3126E2350 rpm C9

2120 rpm H/D

Table 71

Parameter Programming for "Cab Throttle RPM Limit" That is Programmed to The "PTOTop Engine Limit"



"PTO Cab Throttle Limit" PTO TEL

"Top Engine Limit"2640 rpm C7, 3126B, and 3126E2350 rpm C92120 rpm H/D

Table 72





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"Idle/PTO RPM Ramp Rate"

The "Idle/PTO RPM Ramp Rate" determines the rate of acceleration and deceleration of the enginewhen the engine rpm is changing. This happens because of the actuation of the following items:Set/Resume switch, "Idle/PTO Bump RPM", "PTO to Set Speed" and parameters for the "PTO Engine

RPM Set Speed". The "Idle/PTO RPM Ramp Rate" is not applicable to the acceleration and thedeceleration of the engine due to an accelerator position sensor.

The parameter is programmed in one rpm per second increments from 5 to 1000 rpm per second. Thisparameter should be programmed in order to match the application. Some applications have a reducedcycle time that is critical. This will provide reduced cycle times for those applications. Programmingexcessive ramp rates may stress the driven equipment.

"Idle/PTO Bump RPM"

Frame 1



PTO

ResultResultant

Engine RPM

The PTO On/Off switchis OFF. The AcceleratorPedal is fully depressed.


The engine will accelerate to theprogrammed Top Engine Limit of2640 rpm for the C7, 3126B, and3126E engines.Top Engine Limit of 2350 rpmfor C9The Programmed Top EngineLimit is 2120 rpm for H/Dengines.

2640 rpm C7,3126B, and

3126E2350 rpm C9

2120 rpm H/D

Table 73


Frame 2




ResultantEngine RPM

The PTO On/Off Switch isON. The Accelerator Pedal isfully depressed.


The engine will decelerateto the PTO Top EngineLimit of 2100 rpm.The PTO Top EngineLimit is 2000 rpm for H/Dengines.

2100 rpm2000 rpm H/D




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The "Idle/PTO Bump RPM" can be programmed to change the engine rpm when the Set/Resume switchis toggled. This parameter determines the change in rpm when the Set/Resume switch is toggled. If thePTO Engine RPM Set Speed is programmed to one rpm or above, then the parameter is overridden.

Note: The "Idle/PTO Bump RPM" can not be used with the "Fast Idle" operation. The Fast Idle RPM isnot set or changed with the Cruise Control Set/Resume switch.

Table 74

Parameter Programming for "Idle/PTO Bump RPM"

"PTO to Set Speed" NO


"Cruise/Idle/PTO Switch Configuration" Set/Accelerate

"Idle/PTO Bump RPM" 400 rpm

"PTO Top Engine Limit" 1800 rpm

Table 75

"Idle/PTO Bump RPM"

Frame 1


PTOResult

ResultantEngine RPM

The PTO On/Off Switch isOFF. The Set/Resume Switchis OFF.

Start the engine.

The engine willremain at the low idleof 700 rpm.Low idle rpm for H/Dengines is 600 rpm.

700 rpm600 rpm H/D

Table 76

"Idle/PTO Bump RPM"

Frame 2



PTO

ResultResultant

Engine RPM

The PTO On/Off Switchis ON. The Set/Resume

Turn the PTOOn/Off Switch to

The engine will remain at the lowidle of 700 rpm because the PTO

700 rpm600 rpm H/D




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"PTO Vehicle Speed Limit"The parameter for the "PTO Vehicle Speed Limit" is used to disable a "PTO Set Speed" when thevehicle speed exceeds the programmed limit. The PTO On/Off switch operates the "PTO Vehicle SpeedLimit". The programmable range is 2 to 204 km/h (1 to 127 mph) in increments of one. Byprogramming the parameter to one, the PTO Set RPM will be disabled while the vehicle is moving. Thefollowing item will cause disengagement of an active set rpm: exceeding the "PTO Vehicle SpeedLimit".

Note: A PTO that is driven by the transmission will produce a vehicle speed signal. Program the

Switch is OFF. the ON position. to Set Speed is programmed toNO.

Table 77

"Idle/PTO Bump RPM"Frame 3


PTOResult

ResultantEngineRPM

The PTO On/Off switch isON. The Set/ResumeSwitch is in the SET

position.

Quickly toggle theSet/Resume Switch tothe SET position and

then release.

The engine will accelerate400 rpm. This is theIdle/PTO Bump RPM value.The engine rpm is now 1100.

The engine rpm will now be1400 rpm for H/D engines.

1100 rpm1400 rpm

H/D

Table 78

"Idle/PTO Bump RPM"

Frame 4


PTOResult

ResultantEngineRPM

The PTO On/Off switch isON. The Set/ResumeSwitch is in the SETposition.

Quickly toggle theSet/Resume Switch tothe SET position andthen release.

The engine will accelerate400 rpm. This is theIdle/PTO Bump RPM value.The engine rpm is now 1500.

The engine rpm will now be1800 rpm for H/D engines.

1500 rpm1800 rpm

H/D




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parameter for the "PTO Vehicle Speed Limit" to the maximum value of 204 km/h (127 mph) instead ofdisconnecting the vehicle speed circuit during the operation of the PTO. This will ensure that the "PTOSet Speed" will not be disabled due to vehicle speed.

Note: In some instances, a false vehicle signal can be produced during the operation of the PTO due tothe movement of the drive train. If the parameter for the "PTO Vehicle Speed Limit" is programmed to avery low value, then the operation of the PTO will abort when the false vehicle speed exceeds the

programmed limit. It may be necessary to isolate the source of the false speed signal. The "PTO VehicleSpeed Limit" can also be programmed to a higher value.

"Cruise/Idle/PTO Switch Configuration"

This parameter will determine the ACCEL and DECEL function of both the Cruise Control On/Offswitch and the PTO On/Off switch. The switch can be used for the Set/Resume switch or the switch canbe held in position for a constant acceleration. The default positions follow: The Set position is theACCEL position and the Resume position is the DECEL position. This can be changed by using theelectronic service tool.

Note: The Set Switch serves as the RPM Increase position and the Resume Switch serves as the RPMDecrease position under the following conditions: The PTO On/Off Switch is in the ON position. andThe PTO Engine RPM Set Speed is programmed to one rpm or more. This is regardless of theprogrammed setting for the "Cruise/Idle/PTO Switch" configuration.

"Engine Monitoring"

An engine monitoring function is available for the engines. The parameter can be programmed to Off,Warning, Derate or Shutdown. Refer to the engine Operation and Maintenance Manual for additionalinformation regarding this feature.

If Engine Monitoring is programmed to "Derate" or "Shutdown", andone of the monitored conditions is exceeded, then the engine will derateor shutdown. This should be considered especially if derating orshutting the engine down during PTO operation. This could present aproblem for the vehicle or possible injury to the operator.

Copyright 1993, 2003 Caterpillar Inc.All Rights Reserved.

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Wed Sep 10 13:31:07 EST 2003


PTO Configuration TEST

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