Aux Steering; Block Diagram; Open Loop Mini-Wheel; Open Loop Joystick - Danfoss PVED-CLS User Manual

ENGINEERING TOMORROW

AUX steering

When the PVED-CLS is in off-road steering mode (see Figure 3) the operator can choose between following steering
devices: open loop mini wheel steering, open loop joystick steering or closed loop joystick steering.
Important
Only one type of AUX steering device can be present in the steering system at the same time. AUX steering device is selected
by the parameter AUX type (P3240).
The PVED-CLS offers five different AUX open loop mini wheel steering programs, which can be setup with some
individual parameters for the steering ratio. The operator can also select one AUX open loop joystick steering program.
The AUX open loop joystick steering program has its own individual speed dependent flow limit parameters. All AUX
open loop steering programs share common parameters for soft-stop and anti-jerk.
The PVED-CLS offers one AUX closed loop joystick steering program. AUX closed loop joystick steering program has
its own individual speed dependent wheel angle limit parameters.

11.1 BLOCK DIAGRAM

11.1.1 Open loop mini-wheel

Filter Fast steer and EFU

11.1.2 Open loop joystick

Speed dependent
Filter
flow Scaling

11.1.3 Closed loop joystick

Balancing joystick
position offset

11.2 AUX CONFIG

Since the AUX functionality contains both mini wheel functionalities and joystick functionalities, the operator needs
to select which AUX functionality he wants to use, by setting the parameter P3240.
When using auto-guidance functionality, the operator can disengage the auto-guidance functionality and perform a
transition to AUX-program if:

In open loop mode, the PVED-CLS will perform a transition to AUX-program after it has detected that the use
of joystick has exceeded the threshold value specified by P3647.

In closed loop mode, the PVED-CLS detects that by enabling the joystick by setting the flag (byte 5 set to 01)
in the AUX message (see PVED-CLS communication protocol), that the joystick is used and will perform a
transition to AUX-program.
Anti jerk
Figure 35
Anti jerk
Figure 36
Speed dependent Speed dependent
WA limit closed loop control
Figure 37
Flow to spool
Soft-stop
position conversion
Flow to spool
Soft-stop
position conversion
Flow to spool
position conversion
SVC
SVC
SVC