Steering Wheel State Machine - Danfoss PVED-CLS User Manual

ENGINEERING TOMORROW
3.3

STEERING WHEEL STATE MACHINE

Figure 4 shows the steering wheel algorithm state machine. OFF-Road reaction and OFF-Road non-reaction are pure
hydraulic steering and the EH-Valve is inactive.
In Steering wheel program 1 5, the EH-Valve is active and the PVED-CLS behavior can be configured individually.
Find additional information on how to setup the programs in chapter 10.
Steering Wheel State machine
OFF-Road
MMI request for
Steering Program other than
reaction
OFF-Road reaction
steering
PRG_CHANGE_EN
MMI request for OFF-Road
Reaction steering
MMI request for
STW Program 1-5
Steering wheel Program 1-5
MMI request for
STW Program 5
Steering Program change
AND
PRG_CHANGE_EN
MMI request for
STW Program 5
MMI request for
Steering Program change
AND
PRG_CHANGE_EN
MMI request for
STW Program 4
STW Program 4
MMI request for
Steering Program change
AND
PRG_CHANGE_EN
Entry
Point
MMI request for
AND
Steering Program other than
OFF-Road non-reaction
Entry
PRG_CHANGE_EN
Point
MMI request for
OFF-Road
Non Reaction steering
MMI request for
Steering Program other than
OFF-Road non-reaction
AND
PRG_CHANGE_EN
Entry
Point
STW Program 1
MMI request for STW Program 1
MMI request for
Steering Program change
AND
PRG_CHANGE_EN
Entry
Point
MMI request for STW Program 2
MMI request for
Steering Program change
AND
MMI request for
PRG_CHANGE_EN
STW Program 3
STW Program 3
Output State
EH Valve: OFF
Cut-off Valve: OFF
Operation Status message
Operation status: OFF-Road reaction
Lockout for EH-Steering functionality: EH-Steering functionality allowed
Lockout for steering device changes: Controlled by P3250 and Vehicle speed
Lockout for Program changes: Controlled by P3251 and Vehicle speed
Steering wheel algorithms are not executed
AND
NOTE!
In order to utilize the reaction-mode on a vehicle, the steering axle geometry
of the vehicle has to be prepared for reaction-mode and the hardware (cut-
off/mode select spool in OSPE) has to be of the type "reaction/non-reaction"
OFF-Road non-
reaction
Contact your Danfoss PAE for more clarification
steering
Output State
EH Valve: OFF
Cut-off Valve: ON
Operation Status message
Operation status: OFF-Road non-reaction
Lockout for EH-Steering functionality: EH-Steering functionality allowed
Lockout for steering device changes: Controlled by P3250 and Vehicle speed
Lockout for Program changes: Controlled by P3251 and Vehicle speed
Steering wheel algorithms are not executed
Output State
EH Valve: ON
Cut-off Valve: ON
Operation Status message
Operation status: STW Program 1-5
Lockout for EH-Steering functionality: EH-Steering functionality allowed
Lockout for steering device changes: Controlled by P3250 and Vehicle speed
Lockout for Program changes: Controlled by P3251 and Vehicle speed
Steering wheel algorithms are executed
STW Program 2
Figure 4
OFF-Road reaction steering
OFF-Road non-reaction steering
Steering wheel program 1-5