Rockwell Automation 1440-TPS02-01RB XM-320 Position Module - Manual (Page 57)

Publication GMSI10-UM005C-EN-P - May 2010
Configuration Parameters 49
Measurement Mode
Parameter The Measurement Mode parameter controls how the two axial sensors are
used to calculate the position measurement. Use this parameter to configure
the mode of operation.
Normal Mode
In normal mode the module behaves as a two channel differential unit with the
probes mounted on the casing and measuring the shaft position relative to the
casing. Positioning of probes is critical to ensure that valid shaft movement
cannot at any time damage the probes. Selection of probe type and range is
obviously important. The static gaps of the probes are automatically
subtracted from the measurement in order that the system can measure small
movements relative to the total gaps.
When using this mode, the module uses straight targets, angled targets, or
mixed target types, as shown in Figure 3.1.
Measurement Mode
Parameter Name Description Values/Comments
Select the mode of the two axial sensors.
•
Normal - The two sensors are used independently
to perform two separate position measurements.
See page 49 for more information about this mode.
•
Head-to-Head - The two sensors are used
together, facing each other on either side of the
target, to perform a single position measurement.
This mode can be used to extend the measurable
range beyond that of a single sensor. See page 51
for more information about this mode.
•
Radial Cancel - The two sensors are used
together to perform a single position
measurement. The second sensor is set up to
measure the radial movement of the target. The
radial movement is then subtracted from the
position measurement performed by the first
sensor. See page 54 for more information about
this mode.
Options: Normal
Head-to-Head
Radial Cancel XM
Configuration
Utility EDS File
Mode Measurement
Mode