Fault Parameters - Curtis 1244 User Manual

Fault Parameters

Curtis 1244 Manual,
Rev. E
hPD
The high pedal disable (HPD) feature prevents the vehicle from driving the motor
if greater than HPD Threshold throttle is applied when the controller is turned on.
In addition to providing routine smooth starts, HPD also protects against acciden-
tal sudden starts if problems in the throttle linkage (e.g., bent parts, broken return
spring) give a throttle input signal to the controller even with the throttle released.
If the operator attempts to start the vehicle with the throttle already ap-
plied, the controller will inhibit output to the motor until the throttle is reduced
below HPD Threshold. For the vehicle to run, the controller must receive
a KSI input [Type 1],
a KSI input and an interlock input [Type 2], or
a KSI input, an interlock input, and a direction input [Type 3],
before receiving a throttle input. Either of these three types of HPD can be
selected via the programmer. HPD can also be disabled [Type 0]. To meet EEC
requirements, the HPD feature must be programmed to Type 1 or 2. To meet
MSHA requirements, HPD must be programmed to Type 3.
Sequencing delay (see page 47) can be used to provide a variable delay
before the controller is disabled, if desired.
No HPD (Type 0)
HPD function is disabled.
Interlock-type HPD (Type 1)
To start the vehicle, the controller must receive an interlock switch input in
addition to a KSI input before receiving a throttle input. Controller operation
will be disabled immediately if throttle input is greater than HPD Threshold at
the time the interlock switch is closed. Normal controller operation is regained
by reducing the throttle demand to less than HPD Threshold.
KSI-type HPD (Type 2)
To start the vehicle, the controller must receive a KSI input before receiving
a throttle input. Controller operation will be disabled immediately if throttle
input is greater than HPD Threshold at the time KSI is enabled. If throttle is
applied before the interlock switch is closed but after the KSI input has been
enabled, the vehicle will accelerate to the requested speed as soon as the inter-
lock switch is closed. Normal operation is regained by reducing the throttle
demand to less than HPD Threshold.
Golf-type HPD (Type 3)
To start the vehicle, the controller must receive a direction input in addition
to an interlock switch input and a KSI input before receiving a throttle input.
Controller operation will be disabled immediately if throttle input is greater
3 — PROGRAMMABLE PARAMETERS:
Fault Parameters
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