Operation 15
Display Programming
In order to indicate WLL the GS550 must be programmed with a valid rated capacity chart specific
to the crane. The capacity chart programmed can be verified on the chart number page of the
Information menu: press Info → Next → Next (press Exit to return to the operation display). If the
chart number information screen says “Chart not loaded” the GS550 has not been programmed to
function as a rated capacity indicator. If rated capacity indication is required contact the person
responsible for the GS550 system installation and maintenance. If in doubt, contact LSI.
Crane Rigging
Under no circumstances is the GS550 a substitute for safe operating practices. The operator must
fully understand the crane rigging and the crane rated capacity chart to be able to correctly pro-
gram the GS550 for rated capacity indication. The GS550 will not take into account critical vari-
ables such as weather, ground and crane conditions that will reduce the safe working capacity of
the crane.
Chart Wizard
Rated capacity indication is based on interpretation of a selected capacity chart using boom angle
and load radius. The chart must be selected by “rigging” the working hoist in the GS550; this is
done by following the chart wizard in menu 2) Crane Rigging.
Important! It is possible to leave the chart wizard at any time by pressing Bypass; the
GS550 will display the message “Rigging ABORTED”. Current capacity chart selection
may have changed, possibly changing the rated capacity indicated by the GS550.
Always complete the chart wizard all the way to the “Rigging ok” message before
operating the crane.
1. Press Menu → Next → Enter to start the chart wizard.
2. The first page of the chart wizard is generally “select hoist”. Use Up and Down to select the
hoist. If the there is only one load sensor in the system select “main”. With two or more load
sensors in the system the main hoist is associated with the first load sensor in the sensor list;
the auxiliary hoist is associated with the second sensor in the sensor list etc.
3. Press Next to advance to the next step of the chart wizard.
4. The steps that follow will depend on the size and complexity of the rated capacity chart itself.
Typical steps include chart selection, outrigger / on rubber selection and boom length selection
(lattice cranes only). Use Up and Down to select from the list of choices and then press Next to
advance to the next step. For accurate rated capacity indication the rigging configuration se-
lected in the chart wizard must reflect the actual rigging of the working sheave.
5. After the last step has been completed the GS550 will display “Rigging ok” and then it will
return to the operation display. If a sensor required by the selected capacity chart is not a part
of the system or has not established communication with the GS550, then the GS550 will dis-
play “sensor invalid”.
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