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Curtis PMC 1297 Manual
56
operation—with % LV current along the
y
axis instead of % PWM, and the
speed ceiling being determined by the programmed LV Max Current rather
than by the programmed Pump Max Speed.
VARIABLE LIFT
The
variable lift
parameter enables throttle control of Lift speed. When variable
lift is programmed Off, the pump speed is determined by the maximum pump
speed parameter. When variable lift is programmed On, the pump speed is
proportional to the amount of hydraulic throttle applied.
VARIABLE LOWER
The
variable lower
parameter enables throttle control of Lower speed if a
proportional lowering valve is used. When variable lower is programmed Off,
the proportional valve aperture is determined by the LV maximum current
parameter. When variable lower is programmed On, the proportional valve
aperture is proportional to the amount of hydraulic throttle applied.
When a non-proportional lowering valve is used, the variable lower param-
eter has only a slight effect. When programmed On, it will cause the point at
which the valve snaps open to be reached more or less quickly depending on the
amount of throttle applied.
3
B
— PROGRAMMABLE HYDRAULIC PARAMETERS: Hydraulic Throttle