Allen-Bradley 1440-SDM02-01RA, User Manual, Page: 156 / 168

154 Rockwell Automation Publication 1440-UM001D-EN-P - September 2016
Appendix B CIP Objects
Measurement Parameters
Table 84 - Thrust Position Measurement Parameters
Parameter Name Description Values/Comments
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 only) Enter the position of the current Transducer DC Bias reading. mils
Calibration Bias Sets the zero or green position. The zero position is the normal operating position. Setting the zero position
compensates for the static gap, which enables the module to display only the displacement around the zero
position.
The formula that you use depends on the Upscale setting and whether Fault High and Fault Low are both
less than or equal to zero. Use one of these formulas to calculate the Calibration Bias.
• Upscale set to ‘Towards’ Formula
Calibration bias = Transducer DC Bias + (Sensitivity x Calibration Offset) x sin (Target Angle)
• Upscale set to “Away” Formula
Calibration Bias = Transducer DC Bias - (Sensitivity x Calibration Offset) x sin (Target Angle)
If Fault High and Fault Low are both less than or equal to 0, use one of these formulas:
• Upscale set to “Towards” Formula
Calibration bias = Transducer DC Bias - (Sensitivity x Calibration Offset) x sin (Target Angle)
• Upscale set to “Away” Formula
Calibration Bias = Transducer DC Bias + (Sensitivity x Calibration Offset) x sin (Target Angle)
Volts
IMPORTANT: Check with the manufacturer
about operating thrust position and
acceptable tolerances before making any
adjustments.
Calculate Bias (XM
Serial only) Automatically calculates the Calibration Bias value.