SECTION 3 - THEORY OF OPERATION - 1230ES
3-6
– JLG Lift –
3121222
larly, the MOSFET are On continuously (100% Duty Cycle)
to apply all available Battery power to the pump motor (as
in Lift Up at full speed).
When the Control System is energized, the voltage at the P
Terminal will be approxi24V (referenced to -B)
when the pump is static. The P Terminal will be approxi-
mately at +1V (referenced to -B) when the pump is run-
ning at full speed (Lift Up from Ground Mode).
Personalities
Lift system Personality settings can be changed via ANA-
LYZER -> PERSONALITIES -> LIFT:
•
ACCEL - Time to ramp from 0% to 100% command
•
DECEL - Time to ramp from 100% to 0% command
•
UP MIN - Minimum pump speed up (Creep)
•
UP MAX - Maximum pump speed up
•
DN MIN - Minimum pump speed down (Creep)
•
DN MAX - Maximum pump speed down
Interlocks
Lift up will be prevented under the following circum-
stances.
•
Vehicle is tilted, elevated and ANALYZER -> MACHINE
SETUP -> TILT CUTOUT is set to YES.
•
Charging of the vehicle’s battery is in progress and
ANALYZER -> MACHINE SETUP -> CHARGER INTERLOC
is set to DRV & LIFT UP.
3.7
STEER
Steering is actuated by a double action hydraulic cylin-
der. To change steering angle of the drive wheels, the
steer left or steer right solenoid is energized and the
pump is energized. Pressure is applied to one side of the
piston and drained from the other. The pump speed,
and thereby the rate of steering angle change, is
adjusted based on drive speed. This adjustment is modi-
fied by steer personality settings.
Figure 3-6. STEER SYSTEM
Personalities
Steer system Personality settings can be changed via ANA-
LYZER -> PERSONALITIES -> STEER:
•
STATIC - Pump commanded % power when drive
command is 0%
•
DRIVE - Pump commanded % power when drive com-
mand is 100%
Interlocks
Steering is prevented whenever conditions are present to
prevent drive. See Interlocks on Pg. 4
Figure 3-5. Hydraulic Pump Electrical Schematic - 1600423
(SEVCON) Power Module
Series DC
Pump Motor
Line Contactor
24V
+B
–B
P
Power Module
Summary of Contents for 1230ES
Page 1: ...AS NZS Service and Maintenance Manual Model s 1230ES P N 3121222 June 22 2017 ...
Page 2: ...NOTES ...
Page 24: ...SECTION 1 MACHINE SPECIFICATIONS 1 12 JLG Lift 3121222 NOTES ...
Page 32: ...SECTION 2 GENERAL SERVICE INFORMATION 2 8 JLG Lift 3121222 NOTES ...
Page 78: ...SECTION 4 BASE COMPONENTS 4 40 JLG Lift 3121222 NOTES ...
Page 104: ...SECTION 5 CONTROL COMPONENTS 5 26 JLG Lift 3121222 NOTES ...
Page 158: ...SECTION 8 DIAGNOSTIC TROUBLE CODES 8 22 JLG Lift 3121222 NOTES ...
Page 198: ...SECTION 9 GENERAL ELECTRICAL INFORMATION SCHEMATICS 9 40 JLG Lift 3121222 ...
Page 199: ...SECTION 9 GENERAL ELECTRICAL INFORMATION SCHEMATICS 3121222 JLG Lift 9 41 ...
Page 200: ...SECTION 9 GENERAL ELECTRICAL INFORMATION SCHEMATICS 9 42 JLG Lift 3121222 ...
Page 202: ...SECTION 9 GENERAL ELECTRICAL INFORMATION SCHEMATICS 9 44 JLG Lift 3121222 NOTES ...