Wesley BC-620-4CA - Manual (Page 46)

42 Curtis 1234/36/38 Manual,
OS
11
3 — PROGRAMMABLE PARAMETERS: Throttle Parameters
THROTTLE MENU
ALLOWABLE
PARAMETER RANGE DESCRIPTION
Throttle Type 1–5 The 1234/36/38 controllers accept a variety of throttle inputs. The throttle
Throttle_Type 1–5 type parameter can be programmed as follows:
1 2-wire rheostat, 5kΩ–0 input
2 single-ended 3-wire 1kΩ–10kΩ potentiometer,
or 0–5V voltage source
3 2-wire rheostat, 0–5kΩ input
4 wigwag 3-wire 1kΩ–10kΩ potentiometer,
or 0–5V voltage source
5 VCL input (VCL_Throttle)
Note: Do not change this parameter while the controller is powering the
motor. Any time this parameter is changed a Parameter Change Fault
(fault code 49) is set and must be cleared by cycling power; this protects
the controller and the operator.
Forward Deadband 0–5.00 V Defines the wiper voltage at the throttle deadband threshold. Increasing
Forward_Deadband 0–32767 the throttle deadband setting will increase the neutral range. This
parameter is especially useful with throttle assemblies that do not reliably
return to a well-defined neutral point, because it allows the deadband to
be defined wide enough to ensure that the controller goes into neutral
when the throttle mechanism is released.
Forward Map 0–100 % Modifies the vehicle’s response to the throttle input. Setting the throttle
Forward_Map 0–32767 map at 50% provides a linear output response to throttle position. Values
below 50% reduce the controller output at low throttle settings, providing
enhanced slow speed maneuverability. Values above 50% give the vehicle
a faster, more responsive feel at low throttle settings.
The map value is the percentage of controller output at half throttle
((deadband + max)/2).
Forward Max 0–5.00 V Defines the wiper voltage required to produce 100% controller output.
Forward_Max 0–32767 Decreasing the throttle max setting reduces the wiper voltage and
therefore the full stroke necessary to produce full controller output.
This parameter allows reduced-range throttle assemblies to be
accommodated.
Forward Offset 0–100 % Defines the initial controller output generated when the throttle is first
Forward_Offset 0–32767 rotated out of the neutral deadband. For most vehicles, a setting of 0
is appropriate. For heavy vehicles, however, increasing the offset may
improve controllability by reducing the amount of throttle required to start
the vehicle moving.
Note: All four throttle adjustment parameters — Deadband, Map,
Max, Offset — condition the raw throttle voltage into a single %
throttle command, as shown in Figure 13.
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