nifty Heightrider HR17 SP50 HYBRID SERIES 4x4 Operating/safety Instructions Manual

Also see for HR17 HYBRID SERIES: Operating/safety instructions Operating/safety instructions Operating/safety instructions

nifty Heightrider HR17 SP50 HYBRID SERIES 4x4 Operating/safety Instructions Manual Manual pdf 23 page image

Height Rider/SP SeriesOperating & Safety InstructionsEnglish/USA – 03/10Original instructions214 Operation4.1 CONTROL CIRCUIT COMPONENTS4.1.1 GROUND CONTROLSMASTER PROGRAMMEABLE LOGIC CONTROLLER (PLC): - Situated under the ground controlscanopy, behind the Ground Controls Station is the Master PLC. The main purpose of the Master PLC isto process signals received from all areas of the control circuit on the machine and where appropriateoutput these to a series of smaller digital modules to operate the relevant machine functions.Also, during machine operation, the Master PLC is constantly receiving signals from the Platform PLC(see Section 4.1.2) in order to monitor Safety Critical Functions. If for some reason any of thesefunctions became inactive the Master PLC would immediately disable the machine.TILT ALARM: - Fitted to the superstructure behind the ground controls canopy, the tilt alarm is a solid-state sensor, which monitors the inclination of the machine chassis. When the platform is in use, i.e.Booms are raised, if the inclination exceeds the pre-set limit, it will disable the drive to the machine andsound the alarm. In order to recover the machine, the platform operation is unaffected, allowing theoperator to restore drive by lowering the booms into the stowed position. It is then possible to driveback onto level ground, fully restoring machine operation.MULTI-TONE SOUNDER: - Situated inside the ground control station is a small electric sounder, whichis used to provide an intermittent beep whenever the machine is in operation. Pushing a green "powercontrol" button or depressing the foot switch in the platform (if fitted) will energise this sounder. Thisserves to warn personnel of the operation of the machine. In addition, it is this device which producesa ricochet type sound if a safety critical problem has been detected i.e. Tilt angle or Cage weight limitshave been exceeded;Cage Weigh: - If the electronic load cell detects an overload condition it will sound continuously inconjunction with the cage overload warning light.Battery management: - when a low battery state is reached, the "pulsing" of the D.C. motors ismimicked by the sounder reinforcing the message to the operator to charge the machine. Note; ifthe sounder activates whilst using electric power only, it is advisable to start the engine enabling theoperator continued use of the machine, whilst recharging the batteries.HORN: - Located on the side of the ground control box is a horn, which is used as a manual alert, bypushing the "Horn" symbol on the Platform control panel.BOOM SWITCH: - Mounted on the links knuckle and operated by the raising of any boom, this switchcontrols both the operation of the Tilt Alarm Sensor, and the speed control function. With the booms inthe stowed position, the Tilt Alarm Sensor is by-passed, allowing the machine to negotiate slopes inexcess of the permissible working angle, without isolating the drive function. At the same time, HighSpeed drive (Depicted by a Hare Icon) is possible, as is fast throttle on those machines so equipped.When the booms are raised the Tilt Alarm Sensor becomes activated and only Slow Speed drive ispermitted. These control functions are of primary importance to safety of the machine and operator;under no circumstances should this control function be isolated or by-passed.