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

ENGINEERING TOMORROW
Spool calibration - Max
time for acceptable CL P3806 U16
dead-band edge
Spool calibration - Min
time for acceptable CL P3808 U16
dead-band edge
Spool calibration -
P3810 U8
Vector sample size
Spool calibration - Min
P3811 U8
valid samples
Spool calibration - +/-
P3812 U16
turn range sweep add-on
Spool calibration -
Spool set-point P3814 U8
increase/decrease step
Max allowable CAN
WAS signal to be P3881 U16
captured in Neutral
Min voltage needed in
between the captured P3883 U16
CAN WAS values
Min allowable CAN
WAS signal to be P3885 U16
captured in Neutral
9.4.1.1

Auto-calibration parameter plausibility check

P3791, P3795:
Maximum and minimum allowed analogue sensor signal to be captured for analogue sensor (WAS or Joystick) neutral
position. This is applicable for primary and redundant analogue sensor.
•
P3795 < "captured neutral analogue sensor signal value" < P3791.
Important
The analogue sensor 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 analogue sensor values (minimum, neutral and
maximum), to ensure a sufficiently high analogue sensor resolution. The algorithm will determine if left or right has the
highest value. This is applicable for primary and redundant analogue sensor.
•
"Captured rightmost analogue sensor values" - "Captured neutral analogue sensor values" ≥ P3793 and
"Captured neutral analogue sensor values" - "Captured leftmost analogue sensor values" ≥ P3793.
or
•
"Captured leftmost analogue sensor values" - "Captured neutral analogue sensor values" ≥ P3793 and
"Captured neutral analogue sensor values" - "Captured rightmost analogue sensor values" ≥ P3793)
Important
The WAS or Joystick auto-calibration routine will return an error message if detected analogue sensor calibration values
result in a too small working range.
P3797, P3799:
© Danfoss | August 2018
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
- 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 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 stable wheel movement of the vehicle. The
dDeg
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:
• Too slow: add the value specified by P3814 to last set-point value.
• Too fast: subtract the value specified by P3814 to last set-point value
Maximum allowed signal to be captured for neutral position during CAN
mVolts
WAS auto-calibration
Determines the minimum voltage needed in between the captured CAN
mVolts WAS voltage (minimum, neutral and maximum), to ensure a sufficient
high wheel angle resolution during CAN WAS auto-calibration.
Minimum allowed signal to be captured for neutral position during CAN
mVolts
WAS auto-calibration
Table 30
OEM, Dealer 10 600
OEM, Dealer 10 600
OEM, Dealer 1 10
OEM, Dealer 1 10
OEM, Dealer 5 400
OEM, Dealer 1 25
OEM, Dealer 0 5000
OEM, Dealer 0 2500
OEM, Dealer 0 5000
AQ00000211 | 67
110
60
7
5
25
10
4500
0
500