Allen-Bradley 1444-TSCX02-02RB User Manual page 342

Appendix A CIP Objects
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allow the (1x) components in the signal from each contributing source/
shaft to be identified and measured.
• LP/HP filtering with 60 dB per octave characteristic
• Two fixed (5 Hz) bandwidth tracking filters for the gas generator 1x
and power turbine 1x.
• The first order is/must be Tacho 0, the second order Tacho 1.
• Outside a speed range of 5...400 Hz, the output of the tracking filters
is set to zero.
• Expected SRD is 32 (minimum that is allowed is 22).
• In this SRD range full CM capability, including synchronous
sampling are available.
4. These types are applications in the 'general' dynamic category where, for
up to 4 kHz bandwidth, full filtering, processing, measurement, and
condition monitoring capabilities are available. SRD is adjustable from
32...9 (the latter providing the 4 kHz bandwidth).
5. Types 92 and 93 are for Dynamic Pressure applications.
Type 93 instigates a special processing scheme that is optimized for
faster update of FFT band measurement data to support gas turbine
combustion monitoring. Other measurement processing, including CM
data transfer, is not supported in this mode.
Type 92 supports FFT bands but also retains primary path filter options,
Overall (0) processing, and a CM data transfer capability.
In both cases, the total processing load that is placed on the module
influences the FFT band update rate. For best performance, deploy with
the remaining channels that are configured for DC measurements or set
OFF.
6. In 20 kHz mode, the following restrictions apply:
• No tracking filter functionality is supported
• Normal/Advanced CM data is only available from a main path
source
• To accommodate the 20 kHz bandwidth, the SRD for channels 0/1 is
now adjustable, down to 2.
• The SRD for channels 2/3 must be 32.
7. Due to the high sample rate invoked for '40 kHz' mode, the following
restrictions apply:
• The full 40 kHz bandwidth is available to the Overall (1)
measurement (if set pre-filter)
• FFT band and CM Data sources must relate to decimated sample
streams, with a minimum decimation of 5.
• Normal and Advanced CM data is available if their sources are both
set post-filter [3]
Rockwell Automation Publication 1444-UM001D-EN-P - June 2018