Curtis PMC 1297 Manual
31
3
A
— PROGRAMMABLE TRACTION PARAMETERS: Speed
M1–M2, MAX SPEED
The
maximum speed
parameter defines the maximum controller voltage
output at full throttle. The maximum speed parameter is adjustable from 0% to
100% of full output.
The maximum speed is tuned as part of the vehicle performance adjust-
ment process (Section 5).
CREEP SPEED
The
creep speed
parameter defines the initial controller output generated when
a direction is first selected. No applied throttle is necessary for the vehicle to
enter the creep mode, only a direction signal. The controller maintains creep speed
until the throttle is rotated out of the throttle deadband (typically 10% of throttle).
Creep speed is adjustable from 0% to 25% of the controller duty cycle. For
most applications, the default setting of 0% is appropriate. For heavy vehicles,
however, increasing the creep speed may improve controllability by reducing
the amount of throttle required to start the vehicle moving. In any case, the
creep speed should always be set low enough so there is some neutral deadband
before the vehicle starts to move and it should never be set so high the vehicle
is moving too fast when the throttle returns to small values just above the deadband.
NOTE
: The programmed creep speed is not displayed as the “Throttle %”
value in the programmer’s Test Menu when a direction is selected and zero
throttle is applied; only the 0% throttle command is displayed.
H/S LATCH
The
high speed latch
parameter is only applicable when the mode switch is a
momentary switch. When the high speed latch parameter is programmed On,
it allows the mode switch to be “latched” in the M2 position (which is typically
the high speed position) without the operator having to keep it pressed in. In
other words, it makes the momentary switch function as a pushbutton latching
switch. The switch automatically “unlatches” when the vehicle changes direc-
tion, and must be re-latched if desired in the new direction.
CAUTION:
When the vehicle is traveling in high speed mode with the high
speed latch parameter programmed On, emergency reverse is disabled.
INT OVERRIDE
The
interlock override
parameter, when programmed On, allows the vehicle to
be driven with the interlock switch open. The interlock override feature is useful
in situations where it is necessary to move the vehicle but there is not room to
lower the tiller—for example, in a corner.
Speed Parameters
☞
C A U T I O N
