OPERATING PROCEDURES GRT655/655L OPERATOR MANUAL
4-70 Published 3-23-2020, Control # 654-04
Boom Height Limitation Procedure by Crane Position
To define and enable the Boom Height Limitation using the
crane current tip height as the limitation, the following steps
are used:
1. Position the crane to have the desired position.
2. The Height Limitation Screen (Figure 4-43) is to be
shown on the display.
3. For cranes configured with both the Alarm/Warning
Function and the Lock Out Function, choose the desired
function by doing the following:
a. By default, the Lock Out Function is selected. If this
is the desired function, skip to Step 4. If not, use the
Left Arrow or Right Arrow function to highlight the
Lock Out Function symbol.
b. Use the OK button (item 2, Figure 4-40) to change
the Lock Out Function option to the Alarm/Warning
Function option.
4. Use the Right Arrow function to highlight the Enable
symbol.
5. Use an OK button to set the symbol to the limitation
being enabled - it will have the green color when
enabled (note that based on past limitation settings,
alarms may begin at this point).
6. Use the Right Arrow function twice to skip the Limitation
Value and then highlight the Accept Crane Position
symbol (refer to Table 4-6). Use an OK button (item 2,
Figure 4-40) to accept the current crane position (such
as the 11.7 ft value shown in Figure 4-43) to be the
Limitation Value. The Limitation Value should now be
updated on the screen. Note that the boom is now at the
limitation, so alarms are most likely sounding. The boom
can now be moved away from the current tip height to
stop the alarm. Refer to Table 4-4 for how the alarm
performs. Refer to Figure 4-40 for the button to cancel
an audible alarm (once boom motion has stopped).
7. The Height Limitation is now defined and enabled.
Crane operations can be resumed with the WRL working
with this specified limitation.
Boom Height Limitation Procedure by Value
To define and enable the Boom Height Limitation using a
manually entered value of tip height as the limitation, the
following steps can be used:
1. The Boom Height Limitation Screen (Figure 4-43) is to
be shown on the display.
2. Use the Right Arrow function once to highlight the
Enable symbol (refer to Table 4-6).
3. Use an OK button to set the symbol to the limitation
being enabled — it will have the green color when
enabled (note that based on past limitation settings,
alarms may begin at this point).
4. Use the Right Arrow function once to highlight the
Limitation Value. Use an OK button to begin entering the
value. Use the Up Arrow or the Down Arrow to change
the value (in tenths) to the desired tip height value. Use
an OK button (item 2, Figure 4-40) to finish entering the
value. Note that the boom may now be at the limitation
(depending on the value entered), so alarms may be
active. The boom can now be moved away from the
current tip height to stop the alarm, if needed. Refer to
item 1, Figure 4-40 for the button to cancel an audible
alarm (once boom motion has stopped).
5. The Boom Height Limitation is now defined and enabled.
Crane operations can be resumed with the WRL working
with this specified limitation.
Boom Height Limitation Disable Procedure
To disable an active Height Limitation, the following steps
can be used (note that turning off the power to the control
system also disables the WRL limitations):
1. The Boom Height Limitation Screen (Figure 4-43) is to
be shown on the display.
2. Use the Left Arrow and/or Right Arrow function to
highlight the Enable symbol (refer to Table 4-6).
3. Use an OK button (item 2, Figure 4-40) to set the symbol
to the limitation being disabled—it will not have the
green color when it is disabled.
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