Danfoss pved-cl, Operation Manual, Page: 39 / 116

Steering by Steering Wheel – Open Loop
EHPS Type 2 System Diagram
Q
Steering
cylinder
EHPS Valve
Automatic steering
OSP
PVE
Steering angle sensor
Position sensor
P005 225E
Vehicle speed
Joystick or mini wheel
Steering
cylinder
EHPS valve
OSP
PVE
Q
Acquire the Signals
See
Mapping a Steering Device on page 31 on how to map the steering wheel sensor and steering wheel
angle sensor.
Functionality Tree
The tree below illustrates the functionality available in the PVED-CL for open-loop steering wheel
steering. The manufacturing default is found by following the red line. Following the instructions in this
chapter can of course modify it. The switches in the tree are used to select the functionality required. In
case different functionalities are required, the EHPS software provides multiple programs for each
steering device.
P005 202E
Open loop, fixed sensitivity, with no ramps
applied.
Closed loop, fixed sensitivity
Closed loop
Cp=255
Related to
vehicle speed
Sse=3
Fixed
Sse=1
Open loop, fixed sensitivity, with fixed ramp times,
Fixed
Sse=1
Related to
position of
steering actuator
Sse=2
Related to
vehicle speed
Sse=3
Open loop, sensitivity related to steering actuator
position, with fixed ramp times
Open loop, sensitivity related to steering actuator
position, no ramps applied
Open loop, sensitivity related to vehicle speed,
with fixed ramp times
Open loop, sensitivity related to vehicle speed,
no ramp times applied
Open loop
Cp=0
Fixed
Sr=1
Var
Sr=2
C
on
tr
ol pr
inciple swit
ch
Sensitivit
y swit
ch
R
amp swit
ch
Open loop, fixed sensitivity, with variable ramp
times as function to vehicle speed,
Open loop, sensitivity as function to steering actuator
position, with variable ramp times related to vehicle
speed,
Open loop, sensitivity related to vehicle speed,
with ramp times related to vehicle speed
Closed loop, sensitivity related to vehicle speed,
switches
No signal (0)
CAN (255)
C
hannel mapping swit
ch
Cp Sse Sr
No,
Sr=0
default
Fixed
Sr=1
Var
Sr=2
No,
Sr=0
Fixed
Sr=1
Var
Sr=2
No,
Sr=0
* Sensitivity means: number of revolutions on steering wheel from lock to lock
*
Y=0
1
2
3
4
Program number: Y
Open Loop Control
Open loop steering shall be chosen for implementing variable steering ratio or when sideward forces on
articulated steered vehicles must be actively reduced.
Operation Manual
PVED-CL Controller for Electro-Hydraulic Steering, Version 1.38
Steering by Steering Wheel – Open Loop
© Danfoss | May 2016 11025583 | AQ00000216en-US0302 | 39