JLG M450 ANSI Service Manual - Manual (Page 180)

SECTION 6 - JLG CONTROL SYSTEM
6-2 – JLG Lift – 3121127
The JLG designed Control System is a 48 volt based
motor control unit installed on the boom lift.
The JLG Control System has reduced the need for
exposed terminal strips, diodes and trimpots and provides
simplicity in viewing and adjusting the various personality
settings for smooth control of: acceleration, deceleration,
creep and max.-speed for all boom, drive, and steering
functions.
The upper lift, swing, and drive are controlled by individual
joysticks, with steering being controlled by a rocker switch
built into the top the drive joystick. To activate Drive, Lift,
and Swing simply pull up on the slide lock location on the
joystick and move the handle into the direction desired.
The motor controller will control current output, as pro-
grammed for smooth operation and maximum cycle time.
Ground control speeds for all boom functions can also be
programmed into the motor controller. The motor control-
ler also features an adjustable time limit for positive trac-
tion.
The JLG Control System controller has a built in LED to
indicate any faults. The system stores recent faults which
may be accessed for troubleshooting. Optional equip-
ment includes an hour meter, beacon light, function cut-
out, and ground alarm. These options may be added later
but must be programmed into the motor controller when
installed.
The Control System may be accessed in one of two ways:
Utilizing a custom designed, hand held analyzer (Ana-
lyzer, JLG part no. 1600244 & Cable, JLG part no.
1600633) which will display two lines of information at a
time, by scrolling through the program.
NOTE: Each module has a label with the JLG part number
and a serial number which contains a date code.
The following instructions are for using the hand held ana-
lyzer.
To Connect the JLG Control System Analyzer
1. Connect the four pin end of the cable supplied with
the analyzer, to the motor controller module located
in the platform box or at the power module and con-
nect the remaining end of the cable to the analyzer.
NOTE: The cable has a four pin connector at each end of
the cable; the cable cannot be connected back-
wards.
2. Power up the Control System by turning the lower
key to the platform or ground position and pulling
both emergency stop buttons on.
Using the Analyzer
With the machine power on and the analyzer connected
properly, the analyzer will display the following:
HELP:
PRESS ENTER
At this point, using the RIGHT and LEFT arrow keys, you
can move between the top level menu items. To select a
displayed menu item, press ENTER. To cancel a selected
menu item, press ESC.; then you will be able to scroll
using the right and left arrow keys to select a different
menu item.