Curtis MultiMode 1214-8 Manual page 30

Curtis 1214-/15-/19-8 Manual
controller were used. The current multiplication feature gives vehicles using
Curtis controllers dramatically greater driving range per battery charge.
Deceleration rate
The deceleration rate is the time required for the controller to decrease from
100% duty factor to zero. The deceleration rate is fixed, and cannot be adjusted.
The shape of the deceleration curve is controlled by the dynamic throttle
response, which is linear.
Disable recovery (see Fault recovery)
Emergency reverse
Emergency reverse is activated when the brake switch is closed (brake released),
KSI is activated, and the emergency reverse switch (the BB, or "belly button"
switch) is pressed. After the BB switch is released, normal controller operation is
not resumed until neutral (no direction) is selected or until the brake is cycled
(brake, then brake release). However, repeatedly pressing the BB switch will
reactivate the emergency reverse function each time.
Because emergency reverse immediately powers the reverse contactor, some
arcing may occur.
Fault detection
An internal microcontroller automatically maintains surveillance over the func-
tioning of the controller. When a fault is detected, the appropriate fault code is
signalled via the LED, which is externally visible on the front face of the
controller. The diagnostic codes flashed by the LED are listed in Section 5,
Troubleshooting.
If the fault is critical, the controller is disabled. More typically, the fault is a
remediable condition and temporary—for example, an undervoltage fault is
cleared when the condition is removed.
The automatic fault detection system includes:
— emergency reverse circuit check
— F/R contactor coil open / shorted driver
— F/R contactor driver overcurrent / contactor coil short
— F/R contactor welded
APPENDIX A: FEATURES & FUNCTIONS
A-3