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TELESCOPIC BOOM POSITION SWITCH (DRIVE): - Mounted at the cage end of the telescopic boom,
this switch deactivates the drive function if the boom is extended beyond a preset distance.
4.1.2
PLATFORM
PLATFORM PROGRAMMEABLE LOGIC CONTROLLER (PLC): - Situated in the platform is the
Platform Control Station. Behind the platform control panel is the Platform PLC. The purpose of the
Platform PLC is to interpret signals received from the Platform Control Station and convert them to a
digital signal, which is then output to the Master PLC for processing.
MULTI FUNCTION DIGITAL GAUGE: - Mounted in the Platform Control Station, this gauge receives
signals from the Master PLC to provide a warning indication to the operator for a range of functions.
Refer to Section 4.3.2 for further details.
LOAD SENSING CONSOLE (SiOPS
senses if the operator has been pushed or has fallen against the console. If the load applied to the front
of the console is greater than the pre-determined amount, the footswitch will be disabled to increase
operator safety and reduce the possibility of sustained involuntary operation of the cage controls. For
further information refer to Section 4.3.5.
4.1.3
CHASSIS
MOTION CONTROL VALVE: - This valve comprises several individual components all directly involved
in the hydraulic supply to the wheel drive motors.
In addition the Brake Release Valve (BRV) is also incorporated into this valve block. It is a solenoid
operated dump valve, which controls the brake function on the machine. This valve must be energised
to allow the machine to move. If no voltage is present, the wheel motors will not be able to develop
drive torque, whilst at the same time, the parking brakes will remain engaged. Only when a green
"Power Control" push-button is being used (or the Platform Foot-switch is depressed) in Drive mode
will the BRV operate. If the tilt alarm sensor detects an excessive inclination whilst the booms are
raised it is the BRV which is de-energised to isolate the machine.
BATTERY MANAGEMENT: - Battery condition is permanently monitored by the control circuit, such
that when available power has decreased to 20% of full charge, the battery status circuit begins to
"chop" the power to the hydraulic motors. This function causes the drive system to stop & start
alternately, signalling to the operator that re-charging is necessary. At the same time the sounder will
begin to sound intermittently and the low battery warning light will illuminate, reinforcing the charge
warning. At this point, sufficient power remains to drive to the nearest power point. Should the operator
ignore the on-set of the discharge warning, the "chopping" will continue until the machine is rendered
inoperative. Immediate charging will then be required.
BATTERY ISOLATOR: - The battery-disconnect handle is located inside the chassis, underneath the
central cover. In order to isolate the machine control and power circuits from the batteries it is
necessary to pull the release handle, which disconnects the supply to the entire control system. Under
normal operation, the machine key switch should be used to isolate the machine, with the battery
isolator handle only being required for emergencies, in the event of a short circuit, or during routine
maintenance.
English/USA – 05/15
Original instructions
Operating & Safety Instructions
TM
): - This machine incorporates a load sensing cage console that
Height Rider/SP Series
21
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