Rockwell Automation 1440-SDM02-01RA XM-124 Standard Dynamic Measurement Module - Manuel (Page 85)

Rockwell Automation Publication 1440-UM001C-EN-P - May 2014 85
Configure the XM-124 Standard Dynamic Measurement Module Chapter 2
4…20 mA Output Parameters
The 4…20 mA output parameters define the characteristics of the two 4…20 mA
output signals. The parameters are the same for each output.
Table 9 - 4…20 mA Parameters
Parameter Name Description Options/Comments
Enable Enables/disables the 4…20 mA output.
Measurement Sets the type of measurement and the channel that the 4…20 mA
output signal tracks. Options:
• Ch1 / Ch2 Overall
• Ch1 / Ch2 Gap
• Ch1 / Ch2 Band 1–4
• Speed
• Mag
• Ch1 / Ch2 1X Mag
• Ch1 / Ch2 2X Mag
• Ch1 / Ch2 3X Mag
• Ch1 / Ch2 Not 1X
• Ch1 / Ch2 Sum Harmonics
• Acceleration
• Ch1 / Ch2 Thrust Position
• Ch1 / Ch2 gSE Overall
• Ch1 / Ch2 Tracking Mag
• Ch1 / Ch2 Band Pass
• Ch1 / Ch2 Eccentricity
Min Range The measured value associated with the 4 mA. Same measurement unit as Output Data Unit
selection for the specified channel.
Max Range The measured value associated with the 20 mA.
XM Configuration
Utility EDS File
Check to enable Enabled
Clear to disable Disabled
IMPORTANT Measured values between Min Range and Max Range are scaled into the
range from 4…20 to produce the output value. The Min Range value does
not have to be less than the Max Range value. If the Min Range value is
greater than the Max Range value, then the output signal is effectively
inverted from the input signal.
IMPORTANT The 4…20 mA outputs are either on or off. When they are on, the 4…20
mA outputs overshoot the 4 and 20 mA limits by 10% when the
measurement exceeds the minimum and maximum range. This means the
minimum current produced is 3.6 mA and the maximum current produced
is 22 mA.
When the 4…20 mA outputs are off, they produce a current approximately
2.9 mA. The 4…20 mA outputs are off under the following conditions:
The 4…20 mA outputs are set to ‘Disable’ (see Enable on the previous
page).
The module is in Program mode.
A transducer fault or tachometer fault occurs that affects the
corresponding measurement.