Position Feedback Device 3 – Sawtooth Sensor; Fig. 13: Position Feedback Device "3" Signal Flow - Curtis 1222 Manual

3 — PROGRAMMABLE PARAMETERS: Position Feedback
ALLOWABLE
PARAMETER
Center Position (deg)
-180.0° – 180.0°
0x40D3 0x00 -32768 – 32767
Min Volts 0 – 10.00 V
Max Volts
0 – 10.00 V
0x40EF 0x00
Swap Direction
0x4015 0x00
Fault Min 0 – 10.00 V
0x4011 0x00
Fault Max
0 – 10.00 V
0x4012 0x00
Tolerance
0 – 10.00 V
0x40E1 0x00
Fig. 13 Position Feedback Input Device "3" signal flow.
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2 9 J A N U A R Y 2 0 1 3 D R A F T
POSITION FEEDBACK DEVICE 3 – SAWTOOTH SENSOR
RANGE
n
•
Defines the position (in degrees) that corresponds to a steer position
feedback at the center (straight) position (Wheel Position = 0%).
center (straight) without having to physically adjust the sawtooth
sensor.
n
•
Along with Max Volts and Tolerance, this parameter is used to fault-
check the sawtooth signals.
n
•
Set this parameter to the maximum voltage of the sawtooth waveform.
0 – 1023 Along with Min Volts and Tolerance, this parameter is used to fault-
check the sawtooth signals.
n
•
On / Off Inverts the signal to prevent having to physically swap the wires
On / Off to pins 16 and 17.
Sets the minimum threshold for the Analog 5 and Analog 6 inputs
0 – 1023 of the sawtooth 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 sawtooth sensor. If either the Analog 5 or Analog 6 voltage
rises above this threshold for 60 ms, a fault is issued.
The Analog 5 and Analog 6 voltages of the sawtooth sensor should
0 – 1023 always be 0.5*(Max Volts - Min Volts) apart. A fault check is done by
comparing the two voltages and calculating the error. If the error is
greater than the Tolerance voltage for 60 ms, a fault is issued. This
provides a second level of fault detection and triggers a separate
Sawtooth Command fault.
Parameters
DESCRIPTION
This setting allows the service technician to re-calibrate the
+
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Curtis 1222 Manual,
os 15