Buhler 2180 - Manual (Page 127)

SECTION 2 - OPERATION
2-81
Programmable Operation
Programmable operation is provided primarily for
operation of hydraulic cylinders. This feature allows
the operator to program a time delay between when
the control switches are activated and when they will
automatically return to neutral. To operate the remote
electro-hydualic valves in programmed mode,
depress the bottom of rocker switch, 1, as shown.
When the bottom of the switch is depressed, light, 2,
in the switch will begin to flash. This is an indication
to the operator that a timed sequence must be
programmed into the electro-hydraulic controler. The
light will continue to flash for ten second to allow the
operator time to begin the programming sequence.
If a program is not started within this ten second
period, the controller will not accept any sequence
and the remote control switch, 3, will not remain
latched in either the extend or retract positions.
1
3
2
121
To program the electro-hydraulic’s, first insure that
the cylinder hydraulic hoses are properly connected
to the appropriate rear remote valve. Start the tractor
engine and insure the electro-hydraulic engagement
switch is up/on. Set the tractor engine RPM’s at the
normal operating speed in which the cylinder is to be
operated. This is important as the programming of
the control switches is based on a time interval to
correspond to the time it takes the cylinder ram to
extend as well as retract. Any change in engine rpm
will have and effect on hydraulic flow (GPM) and
therefore the time it takes the cylinder to extend and
retract. The control switch timed program always
remains the same regardless of oil flow (GPM) until
reprogrammed. Therefore consistent operation is
required for the system to operate correctly. Using
the corresponding color coded programming switch,
1, depress the bottom of the switch so light, 2, begins
to flash. While the light is flashing use control switch,
3, to extend the cylinder. As soon as the control
switch is activated the programming light will go on
solid. Hold the switch until the cylinder is extended to
the desired position and then return the switch to the
neutral position. When the switch is returned to the
neutral position the programming light will once
again begin to flash indicating that the retract phase
of the cycle needs to be programmed. Next use
control switch, 3, to retract the cylinder. As soon as
the control switch is activated the programming light
will go on solid. Hold the switch until the cylinder is
retracted to the desired position and then return the
switch to the neutral position. After the second phase
has been completed the programming light will go
out indicating that the programming has been
memorized. The control switch timed operation is
now programmed for the extend and retract
operation of the cylinder.
Repeat the above sequence to program the
remaining control switches.
Programming of the control switch can be preformed
in either sequence, extend/retract, retract/extend or
one sequence only, extend or retract. The program
for the individual control switch, 3, will remain the
same even when the engine is stopped and the
ignition switch is in the off position, as long as the
programming switch, 1, remains in the program
position as shown. The maximum allowable time limit
for any programmed timed operation is two minutes.
Programming the control switches with the engine
and hydraulic flow off is possible however accuracy
of actual operation will be marginal. Whenever a
hydraulic application is changed, the control
switches should be reprogrammed to suit the new
operation.
When operating in the timed programmed mode,
feathering of the hydraulic flow is possible by moving
the control switch variably any where between the
neutral position and the fully opened position. The
timed operation sequence only beings once the
control switch has been locked in the fully opened
position.
Should the control switch be moved to the float
position no timed program is possible and the control
switch must be returned back to neutral manually.