Operation and Function of Headland Management System HMS II (If Equipped)

HMS II makes it possible to record and save sequences of functions that occur repeatedly and to call them up as programs as and when they are required. Two such programs can be stored at any one time. Each of them can include up to 20 functions. The programs remain in the memory until they are cancelled, even if the electrical current is switched off.

Recordings may be made of the functions of the following tractor sub-assemblies: differential lock, rockshaft, rear PTO, front PTO, front-wheel drive and selective control valves.

The distance the tractor moves between functions is also stored. The recording is therefore not dependent on the tractor's speed.

 

Basic controls

On/off switch (A):

When this switch is actuated, it beeps.

  • If this switch is actuated while the HMS II mode is on, it turns the HMS II mode off.
  • Actuating this switch does not activate the HMS II mode unless program switch (C) is in its neutral position.
  • If this switch is actuated while a program is being recorded, the recording of the program is interrupted and the program does not get stored in the memory.
  • If this switch is actuated while a program is being performed, the program stops.

Record/save switch (B):

When this switch is actuated, it beeps.

  • If this switch is actuated while the HMS II mode is off, it has no effect.
  • If this switch is actuated while the HMS II mode is on, it starts to record a program.
    LX1026231
    LX1026110
    LX1026232


    A-HMS II on/off switch
    B-Record/save switch
    C-Program switch
    D-HMS II indicator light
    E-Program 1 indicator light
    F-Program 2 indicator light
    G-Location of program switch on tractors without Command Arm

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  • If this switch is actuated while a program is being recorded, the relevant program (1 or 2) is stored in the memory.

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    Program switch (C):

    • If this switch is actuated while the HMS II mode is off, it has no effect.
    • If this switch is actuated while the HMS II mode is on, the relevant program (1 or 2) will start.
    • If this switch is actuated while a program is being recorded, the following functions are allocated to the relevant program.

     

    Functions that can be recorded

    Differential lock:

    Its "on"/"off" status is recorded.

    Front wheel drive:

    Its "brake assist (off)", "on" and "Auto" status are recorded.

    NOTE: If HMS II is to perform a program that includes a front-wheel drive function, the FWD switch must be either in the "on" position or the "Auto" position. If HMS II switches FWD off, the FWD indicator light will flash "slowly" (on briefly, off for longer) until HMS II switches FWD on again or until the FWD switch is moved to its "off" position. In the event of HMS II being switched off during the period of slow flashing, the FWD indicator light changes to "rapid" flashing (on/off for the same length of time) until the FWD switch is moved to its "off" position.

    Rear PTO:

    Its "on"/"off" status is recorded.

    LX1026110

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      NOTE: If HMS II is to perform a program that includes a PTO function, the PTO switch must be in its "on" position. If HMS II switches the PTO off, the PTO indicator light will flash "slowly" (on briefly, off for longer) until HMS II switches the PTO on again or until the PTO switch is moved to its "off" position. In the event of HMS II being switched off during the period of slow flashing, the PTO indicator light changes to "rapid" flashing (on/off for the same length of time) until the PTO switch is moved to its "off" position.

      Front PTO:

      Its "on"/"off" status is recorded.

      NOTE: If HMS II is to perform a program that includes a PTO function, the PTO switch must be in its "on" position. If HMS II switches the PTO off, the PTO indicator light will flash "slowly" (on briefly, off for longer) until HMS II switches the PTO on again or until the PTO switch is moved to its "off" position. In the event of HMS II being switched off during the period of slow flashing, the PTO indicator light changes to "rapid" flashing (on/off for the same length of time) until the PTO switch is moved to its "off" position.

      Rockshaft:

      The "raise" and "lower" functions are recorded.

      NOTE: If HMS II is to perform a program that includes a rockshaft function, the rockshaft control switch must be in its neutral position.

      Selective control valves:

      The "extend", "retract", "float" and "neutral" functions are recorded (on tractors with Command Arm only).

      NOTE: If HMS II is to perform a program that includes an SCV function, the control lever of the relevant SCV must be in its neutral position.

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        Recording a program

        NOTE: To enable programs to be recorded, the tractor must be driven at a speed of at least 0.5 km/h (0.31 mph). Recording may be interrupted if the tractor's speed momentarily drops below 0.5 km/h (0.31 mph). If this interruption lasts more than 60 seconds, the recording will be abandoned.

        The "front PTO on", "rear PTO on" and "lower rockshaft" functions may be recorded only if the tractor is moving forward.

                1.

                Pressing on/off switch (A) makes HMS II indicator light (D) come on.

                2.

                Pressing record/save switch (B) makes light (D) flash and a beep can be heard every 2 seconds.

                3.

                Set program switch (C) to "1" or "2". Program indicator lights (E) or (F) will flash.

                4.

                Perform the desired functions with the tractor.

                5.

                When finished, press record/save switch (B) again. The sequence of functions has been recorded and is now stored as a program. The program indicator light goes out; the HMS II indicator light remains on continuously (no flashing).

                 

                Stopping a recording

                The following actions have the effect of stopping a recording before it is completed:

                          1.

                          Actuating the HMS II on/off switch.

                          2.

                          Not selecting a program within 60 seconds.

                          3.

                          Not performing a function within 60 seconds.

                          4.

                          Not actuating the record/save save switch within 60 seconds of performing the first function.

                          5.

                          Switching on a PTO when the transmission is not in a forward gear.

    LX1026231
    LX1026110
    LX1026232


    A-HMS II on/off switch
    B-Record/save switch
    C-Program switch
    D-HMS II indicator light
    E-Program 1 indicator light
    F-Program 2 indicator light
    G-Location of program switch on tractors without Command Arm

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              6.

              Lowering the rockshaft when the transmission is not in a forward gear.

              7.

              No operator on the seat and the tractor not moving for more than 5 seconds.

              8.

              A fault being detected at the program switch.

               

              Displaying the stored programs

              When HMS II is selected, all the functions included in the two programs are displayed one after the other, each appearing for 2 seconds.

              This display will reappear if the operator vacates his seat for more than 30 seconds while HMS II is active.

Dot matrix display LCD screen Meaning
     
Text "SEQUENCE I" SE-1 Program 1
Text "SEQUENCE II" SE-2 Program 2
Differential lock symbol dLon Differential lock on
Differential lock symbol scored through dLoF Differential lock off
FWD symbol Fdon FWD on
FWD symbol scored through FdoF FWD off
Rear PTO symbol Pton Rear PTO on
Rear PTO symbol scored through PtoF Rear PTO off
Front PTO symbol FPto Front PTO on
Front PTO symbol scored through FPoF Front PTO off
Rockshaft symbol + "up" arrow HUP Rockshaft rises
Rockshaft symbol + "down" arrow Hdn Rockshaft lowers
"Up" arrow + oil pressure symbol + figure EtdX SCV X (1-4) extends
"Down" arrow + oil pressure symbol + figure rEtX SCV X (1-4) retracts
~ + oil pressure symbol + figure FLtX SCV X (1-4) in float
Oil pressure symbol + figure scored through CAnX SCV X (1-4) in neutral
End End Program completed

 

 

Performing the stored programs

NOTE: To enable the prerecorded programs to be performed, the tractor must be driven at a speed of at least 0.5 km/h (0.31 mph).

                1.

                Pressing the on/off switch makes the HMS II indicator light come on.

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                  2.

                  To select the desired program, set the program switch to "1" or "2". The program indicator light comes on. This light goes out once the program has been completed.

                   

                  Faults in the functions

                  If a fault occurs in a function that is included in the program, then the following applies:

                  • If the fault occurred before the program was started, the entire program will not run.
                  • If the fault occurs during the course of the program, then the function in question will be ignored. The other functions are performed in their normal sequence.

                   

                  Manual intervention while a program is running

                  If one of the stored functions is activated manually while the program is running, this function will be ignored for the rest of the program. The function will not be deleted from the program. The other functions are performed in their normal sequence.

                   

                  Stopping a program while it is still running

                  The following actions have the effect of stopping a program while it is still running:

                                    1.

                                    Selecting the other program at the program switch.

                                    2.

                                    Pressing the on/off switch.

                                    3.

                                    Pressing the record/save switch.

                                    4.

                                    It taking longer than 60 seconds for the program to be completed.

                                    5.

                                    The requirement to switch on a PTO when the transmission is not in a forward gear.

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                      6.

                      The requirement to lower the rockshaft when the transmission is not in a forward gear.

                      7.

                      The operator leaving his seat and the tractor not moving for more than 5 seconds.

                      8.

                      The rockshaft or a selective control valve not performing the desired function.

                      9.

                      A fault being detected at the program switch.

                      If a program is stopped while it is running and functions have already been performed, then HMS II reacts as follows:

                      • The differential lock is disengaged.
                      • The status of the FWD remains unchanged.
                      • All the PTOs are switched off.
                      • Rockshaft movement is stopped.
                      • The flow of oil to the SCVs is stopped.

                       

                      Cancelling the stored programs

                                            1.

                                            Pressing the on/off switch makes the HMS II indicator light come on.

                                            2.

                                            Pressing the record/save switch makes the HMS II light flash and a beep can be heard every 2 seconds.

                                            3.

                                            To select the program that is to be cancelled, set the program switch to "1" or "2". The program indicator light starts to flash.

                                            4.

                                            Do not perform any functions with the tractor.

                                            5.

                                            When finished, press the record/save switch again. The selected program is now cancelled. The program indicator light goes out; the HMS II indicator light remains on continuously (no flashing).

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