Manitowoc Grove GRT880, Operator'S Manual

Page: 113 / 202

Grove
Published 3-25-2020, Control # 643-04
3-49
GRT880 OPERATOR MANUAL OPERATING CONTROLS AND PROCEDURES
3
Swing Limitation Procedure by Crane
Position
To define and enable the Swing Limitation using the crane
position to indicate the swing left and right limitation, the
following steps can be used:
1. Position the crane to have the desired swing angle
position for the swing left limitation.
2. The Swing Limitation Screen (Figure 3-24) is to be
shown on the display.
3. Use the Left Arrow and/or Right Arrow function to
highlight the Lockout symbol (orange color; refer to
Table 3-7:). If this symbol is not shown, then only alarm/
warning option is available).
4. Use an OK button (item 2, Figure 3-18) to change the
lockout option to either affect controls (including
lockout), if desired, or to just get warning indicators from
the display. Again, this step can be ignored if this symbol
is not shown.
5. Use the Right Arrow function to highlight the Enable
symbol (refer to Table 3-7:).
6. 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).
7. Use the Right Arrow function once to highlight the swing
left Accept Crane Position symbol (refer to Table 3-7:).
Use an OK button to accept the current crane position
(such as the 68.4 deg value shown in Figure 3-24) to be
the Limitation Value. The Limitation Value for swing left
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 swing angle to cease the alarm. Refer to Table 3-
2: for how the alarm performs when the lockout option is
not used. Refer to Figure 3-18 for the button to cancel an
audible alarm (once boom motion has stopped).
8. Position the crane to have the desired swing angle
position for the swing right limitation. If lockout option is
being used, past settings may prevent swinging to the
next desired limitation position; the over-ride switch
would be used to allow the motion, if this is acceptable.
9. Use the Down Arrow function once to highlight the swing
right Accept Crane Position symbol (refer to Table 3-7:).
Use an OK button to accept the current crane position to
be the Limitation Value. The Limitation Value for swing
right should now be updated on the screen. Again, 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 swing angle to cease the alarm.
10. The Swing Limitation is now defined and enabled. Crane
operations can be resumed with the WRL working with
this specified limitation.
Swing Limitation Disable Procedure
To disable an active Swing Limitation, the following steps are
to be used (note that turning off the power to the control
system also disables the WRL limitations):
1. The Swing Limitation Screen (Figure 3-24) is to be
shown on the display.
2. Use the Left Arrow and/or Right Arrow function to
highlight the Enable symbol.
3. Use an OK button to set the symbol to the limitation
being disabled - it will not have the green color when it is
disabled.