Rockwell Automation 1440-TPS02-01RB XM-320 Position Module - Manual (Page 55)

Publication GMSI10-UM005C-EN-P - May 2010
Configuration Parameters 47
DC Bias Time Constant The time constant used for exponential averaging
(low pass filtering) of the transducer DC bias
measurement. The corner frequency for the low pass
filter is 1 / (2
π
x DC Bias Time Constant). The
greater the value entered, the longer the settling
time of the measured value to a change in the input
signal. See example table below.
Seconds
Target Angle Sets the angle between the shaft and the target
surface. The target surface moves with the shaft.
The transducer is mounted perpendicular to the
target surface. degrees
Upscale Sets the movement of the target relative to the
transducer that is considered positive displacement. Options: Away
Towards
Calibration Offset (XM Serial
Configuration Utility only) Enter the position of the current Transducer DC
Bias reading. mils
Channel Parameters
Parameter Name Description Values/Comments
Time Constant
(seconds) -3dB Frequency
(Hz) Settling
(seconds)
1 0.159 2.2
2 0.080 4.4
3 0.053 6.6
4 0.040 8.8
5 0.032 11
6 0.027 13.2
7 0.023 15.4
8 0.020 17.6
9 0.018 19.8
10 0.016 22