Dynamix Fft Band Object - Allen-Bradley 1444-TSCX02-02RB User Manual

Dynamix FFT Band Object

Table 213 - Class Attributes
Attribute ID Access Rule NV
1 Get NV
8 Get V
9 Get V
10 Get V
11 Get V
12 Get V
13 Get V
Table 214 - Instance Attributes
Attribute ID Access NV
Rule
1 Get V
2 Get V
3 Get V
6 Get V
FFT Band Source
16 Get V
The FFT Band Object (class code 0x399) defines the setup and holds the
results for spectral bands that are calculated from Onboard FFT
measurements. The FFT bands object provides a total 32 instances (an average
of 8 per channel for a 4-channel protection module). The ability to select the
source data for the FFT Band objects allows for future support for linking to
Normal/Advanced CM data objects. Current support is for the Module
Control object only (DSP-based FFT)
Table 212 - Object Instances
Instance ID
0
1...32
Name
Revision
Enabled Instances
Channels with FFTBands
Channel 0 - FFT Bands
Channel 1 - FFT Bands
Channel 2 - FFT Bands
Channel 3 - FFT Bands
Name Data Type
Band RMS REAL
Band max REAL
Band max Frequency REAL
Band Value REAL
Group of two configuration attributes.
Channel Source SINT
Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
Description
FFT Band Class Instance
Instances 1...32 provide for flexible assignment of the FFT bands to any
measurement channel (0...3 for a 4 channel protection module).
Data Type Description of Attribute
UINT Current object revision.
DWORD Bit-wise coding of enabled FFT
Band instances (32 bits used).
WORD Bit-wise coding of channels with
FFT Bands (4 bits used).
DWORD Active instances for
measurement channel 0
DWORD Active instances for
measurement channel 1
DWORD Active instances for
measurement channel 2
DWORD Active instances for
measurement channel 3
Description of Attribute
Overall Band RMS measurement
value.
Maximum line/bin value in band.
Frequency at which Band max occurs.
One value from a choice of Band RMS,
max, and Frequency, made by
configuration.
The channel FFT to which this band is
applied.
CIP Objects Appendix A
Semantics of Values
Current revision.
Decoding information
0: No FFT bands that are allocated
or
1: One or
more FFT bands that are allocated to this
channel
0: This FFT band not allocated
1: This FFT band is allocated to this
channel
Semantics of Values
RMS
Hz / Order
Channel range 0...3
-128: OFF
475