Auto-Calibration Parameter Plausibility Check - Danfoss PVED-CLS User Manual

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Spool calib max time
for acceptable CL DB P3806 U16
edge
Spool calib min time for
P3808 U16
acceptable CL DB edge
Spool calibration vector
P3810 U8
sample size
Spool calibration min
P3811 U8
valid samples
Spool calib +/- turn
P3812 U16
range sweep add-on
Spool setpoint
P3814 U8
increase/decrease step
9.3.1.1

Auto-calibration parameter plausibility check

P3791, P3795:
Maximum and minimum allowed signal to be captured for WAS neutral position. This is applicable for primary and
redundant WAS sensor.
•
P3795 <
Important
The WAS auto-calibration routine will return an error message if the straight heading falls outside the range. Use these
parameters to control the straight heading range.
P3793:
Determines the minimum voltage needed in between the captured WAS values (minimum, neutral and maximum), to
ensure a sufficiently high wheel angle resolution. The algorithm will determine if left or right has the highest value.
This is applicable for primary and redundant WAS sensor.
•
or
•
Important
The WAS auto-calibration routine will return an error message if detected WA calibration values will result in a too small
working range.
P3797, P3799:
Maximum and minimum closed loop dead-band value (for both left and right-side), hence the found dead-band
values needs to be in between P3799 and P3797.
•
be equal to P3168.
•
Left: -
be equal to P3166.
Important
These parameters control the risk of effectuating non plausible large closed-loop dead-band values.
P3806 and P3808 indicate the target sweep time for the spool calibration
x100msec function, to find an acceptable closed loop dead-band edge. That
maximum given time is defined by P3806
P3806 and P3808 indicate the target sweep time for the spool calibration
x100msec function, to find an acceptable closed loop dead-band edge. The
minimum given time is defined by P3808
In most cases, to find an acceptable closed loop dead-band edge within
a given time frame requires more attempts (to ensure consistency in the
dec captured/found values).
P3810 defines the vector size for how many attempts (for left- and right-
side dead-band edge, respectively) should be considered
P3811 defines how many of the attempts (defined by P3810) that need
dec
to be equal to get a successful spool calibration.
This indicates the additional +/- turn range which will be added to the
value in P3804. The additional turn range movement is required to
obtain a stable spool position and also stable wheel movement of the
dDeg
vehicle. The wheels will move in between this +/- turn range, but time
will only be measured in between the +/- turn range specified by P3804.
Resolution: 1 dDeg 1 = 0,1°.
When the auto-calibration function has determined that the last attempt
was too slow or to fast (hence, within the time frame specified by P3806
% and P3808), it will:
< P3791.
-
-
-
-
-P3799; knowing that
last setpoint value.
last setpoint value
Table 29
will be found during the spool calibration and
will be found during the spool calibration and
OEM, Dealer 10 600
OEM, Dealer 10 600
OEM, Dealer 1 10
OEM, Dealer 1 10
OEM, Dealer 5 400
OEM, Dealer 1 25
and
.
and
110
60
7
5
25
10