Position Feedback Device 2 – Sin/Cos Sensor; Fig. 12: Position Feedback Device "2" Signal Flow - Curtis 1222 Manual

ALLOWABLE
PARAMETER
Offset
0 – 10.00 V
0x40D1 0x00
Amplitude
0 – 10.00 V
0x40E0 0x00
Swap Direction
0x4015 0x00
Center Position (deg) -180.0° – 180.0°
0x40D3 0x0 -32768 – 32767
Fault Min
0 – 10.00 V
0x4011 0x00
Fault Max 0 – 10.00 V
0x4012 0x00
Tolerance 0 – 10.00 V
0x40E1 0x00
Fig. 12
Position Feedback Input Device "2" signal flow.
Curtis 1222 Manual,
os 15
2 9 J A N U A R Y 2 0 1 3 D R A F T
3 — PROGRAMMABLE PARAMETERS: Position Feedback
POSITION FEEDBACK DEVICE 2 – SIN/COS SENSOR
RANGE
n
•
Set this parameter to the midpoint voltage of the sine wave output
0 – 1023 of the sin/cos sensor. This value is usually available in the sensor
specifications, and is typically half the voltage supply to the sensor.
n
•
Set this parameter to one half of the expected peak-to-peak voltage
0 – 1023 for the sin/cos sensor input signals.
n
•
On / Off Use this parameter to invert the signal to avoid physically swapping
On / Off the wires to pins 16 and 17.
n
•
Defines the sin/cos position (in degrees) that corresponds to a steer
position feedback at the center (straight) position (Wheel Position = 0%).
This setting allows the service technician to re-calibrate the center
(straight) without having to physically adjust the sin/cos sensor.
Sets the minimum threshold for the Analog 5 and Analog 6 inputs
0 – 1023 of the sin/cos sensor. If either the Analog 5 or Analog 6 voltage falls
below this threshold for 60 ms, a fault is issued.
Sets the maximum threshold for the Analog 5 and Analog 6 inputs
0 – 1023 of the sin/cos sensor. If either the Analog 5 or Analog 6 voltage rises
above this threshold for 60 ms, a fault is issued.
The sine and cosine signals are used together to calculate the
0 – 1023 absolute position, i.e. arctan (Analog 5 / Analog 6). This calculated
position is then used to back-calculate the expected sine and cosine
inputs, based on the Amplitude parameter. If the difference between
these expected inputs and the actual inputs is greater than the set
Tolerance voltage for 60 ms, a fault is issued. This provides a second
level of fault detection and triggers a separate SinCos feedback fault.
DESCRIPTION
Parameters
+
-
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