As a part of crane operator training, entering data in crane’s computer is one of crucial steps of learning to setup and operate crane safely.
Liebherr cranes have their own crane computer calle Liccon – stands for Liebherr Computer Controlling.
Liccon allows crane operator to enter information depending on crane’s configuration, so the computer can work out what the crane can safely lift at all possible distances and hights with different boom angles and lengths, basically said.
Every crane configuration entered into the computer is given a unique code. That code is displayed at the top of the screen. Crane operator can enter the code directly into the computer for a given crane configuration without going through the steps of adjusting all the data separately.
Information entered is: type of boom and boom extension, amount of counterweight on crane, length of outriggers used, slewing area and reeving of main hook block. All data is entered via corresponding “F” keys directly under each data value.
Once all data is entered, basic load chart picture appears, where crane operator can compare SWL with different boom lengths and at different radius; enabling the crane operator to make informed decision about how much boom to extend for the lifting task.
Load charts displays the configuration code, radius, SWL, boom lengths, number of falls, percentage of each boom section to be used for chosen crane configuration, type of boom and boom extension, amount of counterweight on crane, length of outriggers, slewing range.
Once all data is entered and operator is satisfied with the settings, Liccon goes into the working mode screen after pressing F8 – OK button. Section on the screen that has boom sections percentages highlighted determines telescoping sequence which is automated after crane operator switches to main working screen and chooses ‘telescoping’ function of joystick.
Liccon liebherr computer working screen displays utilization chart, winches and their movements, any warnings, wind speed (if anemometer is installed) SLW and tare weight, radius, boom angle, boom length with current percentages of each section used, possible head height and options.
To the right of the screen there is key pad for entering more adjustments.
Via the key pad, crane operator can access all functions of Liccon – go back to the setup/load chart screen, retrieve information about outrigger pressures or adjust outriggers, go directly into telescoping mode, enter the configuration code, adjust speed of movements and more.
With telescope button crane operator can access telescoping adjustments screen directly.
Note the difference between the two pictures.
From the same key pad, crane operator can go straight to the outriggers screen:
Here the crane operator can see all outrigger pressures, adjust outrigger lengths and height, see current crane level and main lifting data.
Other important function that can be accessed from key pad is adjusting the maximum speed of crane motions.
Besides entering the maximum speed, in this screen winches can also be completely blocked to prevent undesired movements made by mistake.
Maximum speed can also be altered via joystick directly – by pressing “rabbit” button.
After pressing high speed button, change is displayed on main working screen with rabbit symbol: