Rockwell Automation 1440-VST02-01RA XM-120 Eccentricity Module - Manual (Page 64)

Publication GMSI10-UM010C-EN-P - May 2010
56 Configuration Parameters
I/O Data Parameters The I/O data parameters are used to configure the content and size of the
DeviceNet I/O Poll response message.
IMPORTANT
Measured values between Min Range and Max Range are
scaled into the range from 4.0 to 20.0 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.
IMPORTANT
The XM-120 must be free of Poll connections when
configuring the Poll Output (Poll Response Assembly)
and Poll Size. Any attempt to download the parameters
while a master device has established the Poll connection
with the Eccentricity module will result in an error.
To close an existing Poll connection with an XM-440,
switch the XM-440 from Run mode to Program mode.
Refer to Changing Operation Modes on page 67.
To close an existing Poll connection with other master
devices, remove the module from the scan list or turn off
the master device.
I/O Data Parameters
Parameter Name Description Values/Comments
COS Size (XM Serial
Configuration Utility only) The size (number of bytes) of the Change of State
(COS) message. The COS Size cannot be changed.