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

Curtis 1222 Manual, os 15
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2 9 J A N U A R Y 2 0 1 3 D R A F T
3 — PROGRAMMABLE PARAMETERS: Position Feedback Parameters
POSITION FEEDBACK DEVICE 2 – SIN/COS SENSOR
ALLOWABLE
PARAMETER RANGE DESCRIPTION
Offset 0 – 10.00 V
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Set this parameter to the midpoint voltage of the sine wave output
0x40D1 0x00 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.
Amplitude 0 – 10.00 V
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Set this parameter to one half of the expected peak-to-peak voltage
0x40E0 0x00 0 – 1023 for the sin/cos sensor input signals.
Swap Direction On / Off
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Use this parameter to invert the signal to avoid physically swapping
0x4015 0x00 On / Off the wires to pins 16 and 17.
Center Position (deg) -180.0° – 180.0°
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Defines the sin/cos position (in degrees) that corresponds to a steer
0x40D3 0x0 -32768 – 32767 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.
Fault Min 0 – 10.00 V Sets the minimum threshold for the Analog 5 and Analog 6 inputs
0x4011 0x00 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.
Fault Max 0 – 10.00 V Sets the maximum threshold for the Analog 5 and Analog 6 inputs
0x4012 0x00 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.
Tolerance 0 – 10.00 V The sine and cosine signals are used together to calculate the
0x40E1 0x00 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.
Fig. 12 Position Feedback Input Device “2” signal flow.
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PCF RIS