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Aeroderivative Measurements
For Aeroderivative measurement types (Hardware Page) the following fixed
assignment must be configured:
• Order 0 must be set to Tachometer Input 0 (gas generator tacho) and a
1x order
• Order 1 must be set to Tachometer Input 1 (power turbine tacho) and a
1x order
The Aeroderivative measurement types provide fixed (5 Hz) bandwidth
tracking filters for the gas generator 1x and power turbine 1x. It is not necessary
to configure the mode specially or filter definition parameters to achieve this
result.
Not-1X Measurement
Implement the Not-1X measurement by setting:
• Tracking filter 0 must be set to 1x (either tacho can be used)
• The same measurement Engineering Units for both the order and the
overall (1) (Overall Page) measurements
The Not-1X measurement then calculates the difference between the Overall
(1) measurement and the first order result. The Not-1X functionality is
primarily provided for XY applications. And while the tracking filters can be
used to provide integrated measurement data, the Not-1X measurement is not
usable in these applications.
The Not-1X measurement data is always presented in the same detection type
as the order measurement, this measurement does not rely on the overall (1)
being configured similarly.
The Not-1X measurement can, if desired, provide a "Not-2x", or other,
indication by simply changing the order configuration of the first tracking filter
on any particular channel. The 'Not-1X' is calculated whenever the first
tracking filter is enabled, irrespective whether it is configured for order 1 (1x).
Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
Measurement Definition
Chapter 4
139
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