Curtis PMC 1297 Manual
A-5
APPENDIX A: GLOSSARY
Field current values
The maximum and minimum field current limit values have a powerful
influence on the vehicle’s maximum speed and torque—see Section 3A, page 41.
Tuning the maximum and minimum field current limits is described in detail
in Section 5: Vehicle Performance Adjustment.
Full bridge
The 1297 controller uses a full bridge design for control of the traction motor’s
field winding. This eliminates the need for external direction contactors. The
result is a higher reliability product that is smaller and simpler to install.
Half bridge
The 1297 controller uses a half bridge topology for the traction motor’s
armature drive. This provides reliable and highly efficient vehicle control with
full all-electronic regenerative braking to zero speed.
High-pedal-disable (HPD)
The HPD feature prevents the vehicle from driving if the controller is turned
on when greater than 25% throttle is applied—see Section 3A, page 44.
Hourmeters
The 1297 has three built-in hourmeters: the total hourmeter (measuring KSI-
on hours), the traction motor hourmeter (measuring drive hours), and the
pump motor hourmeter (measuring pump hours)—see Section 3C, page 59.
Hydraulic inhibit
The hydraulic inhibit feature prevents Lift or Lower operation if the hydraulic
throttle request is greater than 25% when the interlock switch is closed—see
Section 3B, page 48.
Interlock braking
If the interlock switch is opened while the vehicle is being driven, the 1297
controller sends braking current to the motor—see Section 3A, page 27.
Interlock switch
The interlock switch is a controller-enable input intended to provide a second-
ary operational interlock for the controller in addition to the keyswitch input.
If an interlock switch is used, it must be closed in order for the controller to
operate. This safety interlock is used on most material handling vehicles,
typically in the form of a tiller switch, deadman footswitch, or seatswitch.
To Next Page
Loading...
