Rockwell Automation 1440-DYN02-01RJ XM Dynamic Measurement Module - Manuel (Page 151)

Publication ICM-UM002F-EN-E - March 2013
151
Glossary
averaging
The process of combining multiple data samples to minimize the influence of
transient signals so that the real characteristics of machine vibration can be
determined.
alarm
An alarm alerts you to a change in a measurement. For example, an alarm can
notify you when the measured vibration level for a machine exceeds a
pre-defined value.
band
A frequency range, such as the frequency range between 1,800 and 3,200 Hz.
baud rate
The baud rate is the speed at which data is transferred over the XM Bus. The
available data rates depend on the type of cable and total cable length used on
the network:
The1440-DYN02-01RJ module baud rate is determined by automatic baud
rate detection (autobaud). The module listens to network traffic to determine
the baud rate before it goes online.
bus off
A bus off condition occurs when an abnormal rate of errors is detected on the
Control Area Network (CAN) bus in a device. The bus-off device cannot
receive or transmit messages on the network. This condition is often caused by
corruption of the network data signals due to noise or baud rate mismatch.
data type
A definition of the size and layout of memory that will be allocated when a tag
of the data type is created. Data types can be atomic, structure, or array.
disarm state
See Program mode.
Maximum Cable Length
Cable 125 K 250 K 500 K
Thick Trunk Line 500 m (1,640 ft.) 250 m (820 ft.) 100 m (328 ft.)
Thin Trunk Line 100 m (328 ft.) 100 m (328 ft.) 100 m (328 ft.)
Maximum Drop Length 6 m (20 ft.) 6 m (20 ft.) 6 m (20 ft.)
Cumulative Drop Length 156 m (512 ft.) 78 m (256 ft.) 39 m (128 ft.)