JLG 1500SJ Service Manual - Manual (Page 256)

SECTION 4 - BOOM & PLATFORM
4-10 – JLG Lift – 3121262
Swing/Axle Extend Retract Restrictions
In addition to the Direction Of Steer proximity switch in the
chassis, a 360 degree dual rotary sensor is also used to
calculate the turntable rotation angle. These sensors are
used together to restrict swing when the machine is in the
transport state. If the machine is in the transport state and
the operator is attempting to swing the boom, the control
system shall allow swing until the angle is at approx. +/-
40 Degrees from the transport position or the DOS prox-
imity switch is tripped. At this point the control system will
use the turntable rotary angle sensor to determine which
swing function is allowed to return the boom between the
rear wheels. Attempts to continue swinging in the wrong
direction causes the DOS indicator light to flash. If the
machine is in the transport state with the exception of the
axles being extended and the operator has the boom out-
side of the rear wheels, the control system disallows axle
retract until the boom is again within the rear wheels.
Faults within this system override DOS functionality.
Dual Capacity
The position of the jib telescope is integrated into the dual
capacity logic and the logic relating to the jib swing con-
trol and dual capacity will be removed since the jib is
restricted from swinging in all cases except when the
machine is in the transport state. In order to switch from
the 500# capacity mode to 1000# capacity mode the jib
will have to be fully retracted, (determined by the two
proximity switches mounted on the side of the jib) and the
operating envelope will have to be in the 1000# envelope
in order to switch capacity modes. The jib transport/dual
capacity proximity sensors are mounted in line so one
should switch before the other. The control system moni-
tors the proximity sensors changing state in relation to jib
telescope in versus jib telescope out.
Jib Control During Over/Under Moment
During an overmoment condition the control system limits
the jib functions to jib telescope in only. During an under-
moment condition the control system disables all jib func-
tions.
Boom Recovery Mode
Boom Recovery Mode allows the boom to be lifted down
and telescoped in, in the event CAN bus communication
is lost to both the Jib Control Module and the Platform
Module.
Boom Recovery Override is only available in the event the
ground module loses CAN communication with both the
Jib Control Module and the Platform module, in the case
of a severed boom cable for example. This mode allows
the boom to be lifted down and telescoped in.
Boom Recovery override is accessible in Access Level 1.
Using the Left and Right arrow keys until the
screen shown below is reached.
Press ENTER , the screen should read: