Curtis PMC 1297 Manual
A-6
APPENDIX A: GLOSSARY
Cycling the interlock switch or the keyswitch clears most faults and re-enables
operation.
KSI
KSI (Key Switch Input) provides power to the controller’s logic board, initializes
the microprocessor, and starts diagnostics. In combination with the interlock
switch input, KSI enables all logic functions.
Lift lockout features
Lift operation can be prevented when the pump motor current is too high, when
the battery state-of-charge is below 20%, or when more than 25% throttle is
requested at the time the interlock switch is closed—see Section 3B, page 48.
Load compensation
The load compensation feature adjusts the applied motor voltage as a function
of motor load current. Load compensation results in more constant vehicle
speeds over variations in motor loading due to ramps and cargo weights, without
the operator having to constantly adjust the throttle position—see Section 3A,
page 32.
Lowering valve
The aperture of the hydraulic line’s lowering valve determines the speed of
Lower operation; the lowering valve can be either a proportional valve or a
simple open/closed valve—see Section 3B, page 49.
M- fault detection
This feature determines if the M- power connection is being held low (to B-) by
an internal or external fault condition. If an M- fault is detected at the traction
motor or pump motor M- power connection, the controller will inhibit PWM
output and release the main contactor. External M- fault detection is not
performed if greater than 50% throttle is being requested. No M- fault detection
is performed if emergency reverse is activated.
MOSFET
A MOSFET (metal oxide semiconductor field effect transistor) is a type of
transistor characterized by its fast switching speeds and very low losses.
MultiMode™
The MultiMode™ feature of the 1297 controller allows the vehicle to be
operated with two distinct sets of characteristics. Typically, Mode 1 is pro-
grammed for slow precise indoor maneuvering and Mode 2 for faster, long
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