Danfoss PVED-CLS User Manual page 13

ENGINEERING TOMORROW
sensor and two vehicle speed signals transmitted on the CAN bus (from two independent sources) are prerequisite in
order to get the PVED-CLS up and running. The system also requires an MMI installed (for changing programs, steering
devices, steering modes etc.). Additionally, an auto-guidance controller and an auxiliary-device (e.g. mini-wheel,
joystick) can be connected to the CAN bus for enabling auto-guidance-steering and auxiliary-device-steering.
When the PVED-CLS is mounted on an EHPS the cut-off valve is not present, therefore P3072 needs to be 0 and the
valve type needs to be set to EHPS by setting P3081 to 1. Furthermore, as the flow direction in an EHPS compared to
OSPE/EHI is inverted, the PVED-CLS need to be provided with this information, which can be done by setting P3080 to
255.
The cylinder stroke volume is needed, in ccm. It needs to be entered in P3086 and the number of steering wheel
turns lock-to-lock, without activating the PVED-CLS needs to be entered in P3082.
Important
The OSP displacement (P3084) must be set to 0, when the PVED-CLS is mounted on an EHPS!
Name
Cut-off valve present P3072 U8
Invert Flow Direction P3080 U8
Valve type P3081 U8
Turns lock-to-lock EHPS P3082 U16
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

EHPS Steering Valve, PVE Actuation, OSPCX CN Steering Unit
Description of parameter
Cut-off Valve Present/Not Present
BOOL
Valid Values: 0 (NOT PRESENT); 255 (PRESENT)
Changes the direction of the requested flow
BOOL
Valid Values: 0 (NO, DEFAULT OSPE/EHI); 255 (YES, DEFAULT EHPS)
Valve type on which the PVED-CLS is mounted
dec
Valid Values: 0 (OSPE, EHI); 1 (EHPS)
Number of steering wheel turns lock-to-lock, without PVED-CLS
activated (hence pure hydraulic). Lock-to-lock is dependent on:

OSP displacement

EH-spool and pilot flow

Standby pressure (spring force)
dec

Cylinder volume
Contact your local technical support at Danfoss Power Solutions for
specific calculation, or simply do the measurement/exercise on the
vehicle
Resolution: 0.01 turns
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
OEM
OEM
OEM
OEM
OEM
OEM
Table 2
Range
0 255 255 S
0 255 0 S
0 1 0 S
100 1000 450 S
0 1200 120 S
100 65535 500 S