Road Switch Monitoring; Valve Capacity - Danfoss PVED-CLS User Manual

ENGINEERING TOMORROW
Name
Cut-off valve present P3072 U8
Road switch present
P3241 U8
(connected to AD3)
Road Switch Resistance
P3242 U8
check
7.1.2.1

Road switch monitoring

The PVED-CLS will perform a cut-off solenoid valve connection test when PVED-CLS is in safe on-road state. Safe
state will be triggered if the cut-off solenoid valve is found connected.
When PVED-CLS is in Safe on-road state, this function slowly increases the duty-cycle on the cut-off output. If the
current raises above the parameter threshold, specified by P3243, the PVED-CLS goes to safe, because it has
detected that the Cut-off coil was not disconnected on the transition to Safe on-road thus reports a relay switch
failure.
Name
Max COV connection
P3243 U8
test current
7.1.3

Valve capacity

The valve capacity parameter (P3088) must be set to the corresponding EH flow size.
P3088 indicates the EH-
nominal value for the EH-
Depending on the standby pressure for the steering system, the actual maximum output flow will deviate. As default,
the nominal value will in most cases give a very acceptable steering performance in quick steering-mode but for fine-
tuning of P3088, please contact your local Danfoss representative.
Following example is valid for OSPE with internal priority valve with 7 bar spring and 1.0 mm dynamic orifice and @
60 l/min pump flow. For OSPE without internal priority valve, the curves are valid in combination with external priority
valve OLS 80, P/N:152B8269 @ 60 l/min pump flow:
Description of parameter
Cut-off Valve Present/Not Present
BOOL
Valid Values: 0 (NOT PRESENT); 255 (PRESENT)
Specifies whether the road switch is or is not present, i.e. connected to
BOOL
the analog input AD3
Road Switch Resistance check Enable/Disable
BOOL
Valid Values: 0 (DISABLE); 255 (ENABLE)
Description of parameter
The max. current allowed to be observed during the cut-off solenoid
mAmp
valve connection test.
EHI or EHPS) maximum output flow, given in liters per minute. The
Table 12
Table 13
Range
OEM 0 255
OEM 0 255
OEM 0 255
Range
OEM 10 255
255 S
255 S
0 S
100 S