Reduced State; Reduced Steering Functionality; High Priority Steering Device Fault; Low Priority Steering Device Fault - Danfoss pved-cl Operation Manual

Operation Manual
PVED-CL Controller for Electro-Hydraulic Steering, Version 1.38

Reduced State

Reduced State

Reduced Steering Functionality

Symbol
HPSTDReducedModeAllowed
The parameter controls both analogue and CAN based steering devices.
'False' infers that the PVED-CL will enter fault state if a fault occurs.
© Danfoss | May 2016
The PVED-CL contains functionality that allows the system architect to set up a "graceful degradation"
behavior if e.g. a sensor faults should occur. The overall objective is to sustain the machine up-time and
to allow the driver to finish the mission with as much steering performance as possible.
Faults on the following sensors can be configured to allow the PVED-CL to enter reduced state:
•
High Priority (HP) steering device faults
•
Low Priority (LP) steering device faults
•
Vehicle speed sensor faults
•
Steered wheel angle sensor faults
start
Operation state
Reduced state
Yes
IS
SWAReducedModeAll o wed OR
VSReducedModeAll o wed OR
HPSTLReducedModeAll o wed OR
LPSTLReducedModeAll o wed
= TRUE ?
The steering functionality in reduced state is dependent on which of the allowed faults are present as
presented below.

High Priority Steering Device Fault

HPSTDReducedModeAllowed parameter indicates to the PVED-CL error handler, that any fault related
to the High priority steering device shall bring the PVED-CL into reduced state and change the high
priority steering device functionality as follows:
•
High priority steering device disabled
•
High priority steering device enable not possible (see
Control on page 75)
Index
64013
The high priority steering device faults that can trigger reduced state can be found in
Interface on page 102.

Low Priority Steering Device Fault

LPSTDReducedModeAllowed parameter indicates to the PVED-CL error handler, that any fault related
to the Low priority steering device shall bring the PVED-CL into reduced state and change the Low
priority steering device functionality as follows:
•
Low priority steering device disabled
•
Low priority steering device enable not possible (see
Control on page 92)
Is
fault related to
HP steering device OR
Fault detected
LP steering device OR
Vehicle speed sensor OR
Steered wheel angle sensor ?
No
Yes
No Fault state
Power off
High Priority Steering Device Enable/Disable
Default Value range
0 0 (FALSE), 255 (TRUE)
Low Priority Steering Device Enable/Disable
J1939 Diagnostic
11025583 | AQ00000216en-US0302 | 99