AC TRACTION – ADJUSTMENTS PG DRIVES TECHNOLOGY
1.11 Footbrake Regen. Braking – (FBrake)
This sets the strength of the braking when the brake pedal is fully operated, i.e. the voltage from the footbrake potentiometer is
equal to the setting of the parameter, 1.24 Footbrake 100% Voltage. The setting is a percentage of the maximum permissible
braking slip, as set by the Braking Slip parameters, 4.24 & 4.25 and the Braking Neutral Slip parameters 4.28 & 4.29 for the actual
speed of the vehicle.
The adjustable range is 0% to 100% in 1.0% steps.
This parameter has no effect in Speed Control mode.
1.12 Direction Braking Ramp – (DBrkRamp)
In Torque Control mode this sets the time taken to ramp from drive slip demand to full braking slip demand, as set by the
parameter, 1.9 Direction Regen Braking, upon a change of direction. Increasing the value gives a smoother but longer transition
from drive to braking.
In Speed Control mode this sets the time taken to ramp down the speed in the current direction to zero, upon a change of
direction. After passing through zero speed, the normal acceleration time as described in 1.1 Acceleration, applies. Increasing
the value gives a smoother but longer transition to zero speed.
The adjustable range is 0.1s to 10s in 0.1s steps.
In Torque Control mode this parameter is normally set to a much lower value than when in Speed
Control mode. Care must be taken when changing between Torque and Speed Control modes to
ensure that this setting is adjusted correctly.
1.13 Neutral Braking Ramp – (NBrkRamp)
In Torque Control mode this sets the time taken to ramp from drive slip demand to full braking slip demand, as set by the
parameter, 1.10 Neutral Regen. Braking, when the vehicle enters neutral, i.e. no drive signal in either direction. Increasing the
value gives a smoother but longer transition from drive to braking.
In Speed Control mode this sets the time taken to ramp down the speed to zero, when the vehicle enters neutral, i.e. no drive
signal in either direction. Increasing the value gives a smoother but longer transition to zero speed.
The adjustable range is 0.1s to 10s in 0.1s steps.
In Torque Control mode this parameter is normally set to a much lower value than when in Speed
Control mode. Care must be taken when changing between Torque and Speed Control modes to
ensure that this setting is adjusted correctly.
1.14 Footbrake Ramp – (FBrkRamp)
In Torque Control mode this sets the time taken to ramp from drive slip to full braking slip demand, as set by the parameter, 1.11
Footbrake Regen. Braking, when the brake pedal is operated. Increasing the value gives a smoother but longer transition from
drive to braking.
In Speed Control mode this sets the time taken to ramp down the speed to zero, when the footbrake pedal is operated.
Increasing the value gives a smoother but longer transition to zero speed.
The adjustable range is 0.1s to 10s in 0.1s steps.
In Torque Control mode this parameter is normally set to a much lower value than when in Speed
Control mode. Care must be taken when changing between Torque and Speed Control modes to
ensure that this setting is adjusted correctly.
SK79646-01 30
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