Sevcon Gen4 User Manual

Configuration
Doc. # 177/52701
Rev. 3.3
6-33
Power steer configuration
General
Power steering can be provided using:
 Contactor. Map the power steer contactor drive object to an analogue output.
 Pump motor controller. Configure pump to provide power steering. Power steer demand is
added to pump demand.
 Dedicated motor controller. Map power steer application motor object to motor control slave.
NOTE: Power steer motors always run in speed mode. Ensure the motor slave is also
configured for speed mode in 6060
h
.

The power steer can be triggered by a number of events:
 Vehicle moving
 FS1 switch activating
 Direction selected.
 Seat switch activating
 Footbrake activating
CAUTION: The power steering function will always attempt to execute, even if the line contactor
is open due to a fault condition. This is to ensure power steering continues to operate at all
times.
Set the power steer motor speed, acceleration and deceleration at 2B01
h
. This is not required if
the power steer motor is operated by a contactor.
Variable Assist Power Steering
Gen4 supports a variable assist power steering algorithm which can be used to reduce the
power steering speed as vehicle traction speed increases to a user configurable level. Set the
reduction factor and traction speed in 2B02
h
. This allows power steering effort to be reduced as
vehicle speed increases to prevent steering becoming too light.

Sevcon Gen4 Specifications

General

Brand	Sevcon
Model	Gen4
Category	Controller
Language	English