Ehps System - Danfoss PVED-CLS User Manual

ENGINEERING TOMORROW
Name
Cut-off valve present P3072 U8
Valve type P3081 U8
OSP displacement P3084 U16
Cylinder stroke volume P3086 U16
For further information on how to design steering-system and sensor sub-systems, please refer to the following:

OSPE Steering valve, SASA sensor, Technical information

PVED-CLS Safety Manual
2.2

EHPS SYSTEM

OSPCX
CAN bus – Steering bus
(Terminate with 120 Ohms in both ends)
SASA-sensor
PVED-CLS
Vehicle speed
sensor
Auto-guidance
MMI
AUX
PLUS+1 Service
tool
In a standard EHPS with PVED-CLS-system, a wheel angle sensor (Danfoss recommend a redundant sensor like
illustrated on Figure 2, to meet category 3 according to ISO13849) either analogue or CAN-based, a Danfoss SASAIID
Description of parameter
Cut-off Valve Present/Not Present
BOOL
Valid Values: 0 (NOT PRESENT); 255 (PRESENT)
PVED-CLS is attached to which type of valve?
dec
Valid Values: 0 (OSPE, EHI); 1 (EHPS)
OSP displacement, number of cubic centimeters per revolution
ccm Note: When the PVED-CLS is mounted on an EHPS this parameter
must be set equal to 0!
Cylinder stroke volume.
Acceptable values: 100-10000.
ccm
Note: Writing values >10000 will force to use automatic adjusted
cylinder stroke volume-value on WAS calibration
Vbat +
Vbat -
(9 ... 32 V )
Key off/de-energize
CAN_safety
Safety
Micro-crontroller
AD1
AD2
WAS
AD3 (not used)
5V sensor supply +
Sensor ground -
Main
Micro-crontroller
CAN_Main
Table 1
EHPS-valve
Cut-off
valve output
Directional
spool
Vbat-
Solenoid
Main spool position
valve
P
bridge
Main spool position
Main spool position
Figure 2
Range
OEM 0
OEM 0
OEM 0
OEM 100
Cylinder
Wheel angle sensor diagram
+V1
+V2
Wheel
GND1
Angle
GND2
Sensor
OUT1
OUT2
LVDT
T
PVED-CLS
255 255 S
1 0 S
1200 120 S
65535 500 S
5V sersor supply
Sensor ground -
AD1
AD2