Manitowoc Grove GRT880, Operator'S Manual

Page: 103 / 202

Grove
Published 3-25-2020, Control # 643-04
3-39
GRT880 OPERATOR MANUAL OPERATING CONTROLS AND PROCEDURES
3
Table 3-4: Screen Symbols
In addition to the symbols that can be highlighted by the
arrow functions, the following is shown on the screen:
Height Limitation Procedure by Crane
Position
To define and enable the 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 3-21) is to be
shown on the display.
3. Use the Left Arrow and/or Right Arrow function to
highlight the Lockout symbol (the green symbol, refer to
Table 3-4:, will turn orange). If this symbol is not shown,
then this can be ignored (WRL configured to not enable
the lockout option).
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.
5. Use the Right Arrow function to highlight the Enable
symbol.
6. Use an OK button to set the symbol to the limitation
being enabled - it will have the green color when
Symbol Description
Lockout symbol - this symbol indicates the selection for affecting crane functions (lockout) or just
alarm/warning. This symbol will not appear if the WRL is not configured for the lockout option.
Furthermore, in some countries, regulations may require the use of the lockout configuration, and
lockout will always be enabled (so it may not be able to change from lockout to alarm/warning). The
selection for this option is toggled with an OK button, item 2, Figure 3-18. The top symbol indicates
that the crane functions will be affected (lockout). The bottom symbol indicates that the crane
functions will not be affected (but warnings will still be indicated).
Enable symbol - this symbol is used to enable or disable the limitation. The selection for this option is
changed with an OK button, item 2, Figure 3-18. The symbols shown on the top (green background)
indicate that the limitation is enabled. The symbols shown on the bottom (not green background)
indicate that the limitation is disabled.
Limitation Value - this is the current limitation value (the RCL tip height; which is a distance above a
ground level). If the limitation is enabled, and this symbol on the screen is highlighted (orange color),
after using the OK button, the value can be changed to be higher or lower with the Up Arrow and Down
Arrow function on the display or jog dial. The OK button (item 2, Figure 3-18) is used to begin and
complete the value entry. It can also be changed by accepting the current crane position (see next
symbol). If the limitation value is below the minimum allowed, a fault will be generated, and a fault
symbol will appear on the display.
Accept Crane Position symbol - If the limitation is enabled, this symbol allows the acceptance of the
current crane position to be the limitation value (current tip height becomes height limitation). If this
symbol is highlighted (as shown here with orange background), and the crane position is accepted
with an OK button, then the value shown in the Limitation Value is updated to be the current crane
position. If the limitation value is below the minimum allowed, a fault will be generated, and a fault
symbol will appear on the display.
Symbol Description
Current Crane Position - this value shown on the screen is the current crane position tip height value.
It is the same value shown in the RCL screen.