Allen-Bradley 1444-TSCX02-02RB User Manual page 393

Table 120 - Record Type Structures
Byte Offset Structure Member
Within Structure
0 TimestampNanoSec
4 TimestampSec
8 Reserved
12 Reserved
16 Params0
20 Params1
24 Params2
28 Params3
32 ByteCount
36 DataArray
Table 121 - Record Type Structures
Byte Offset Within Structure Member
Structure
0 TimestampNanoSec
4 TimestampSec
8 SamplePeriodInSecs
12 identifier*
16 ucDataSelect
17 ucSpeedByte0
18 ucSpeedByte1
19 ucSpeedByte2
20 ByteCount
24 LineArray
The Record Type Structures are as follows.
High and Low-Resolution Trend (eHIGH_RES_TREND,
eLOW_RES_TREND, eHIGH_RES_ALARM, eLOW_RES_ALARM)
Data Type Description
UDINT Subsecond accuracy.
UDINT Seconds since 1970.
DWORD
DWORD
DWORD Set bits indicate which parameters are included in the data array. The values in DataArray
are in the order of the set bits. Value is the same as the configuration tag
DWORD
Trend.StaticParams0...3.
DWORD
DWORD
UDINT The number of bytes in the data array. This is equal to the number of bits set in the
parameters Params0...Params3 (x4).
REAL The array of parameters included in the trend data set. Is a packed array where the first value
is the first set bit, the second value is the next set bit, and so on.
FFT (eFFT, eFFT_ALARM)
Data Type
UDINT
UDINT
REAL
DWORD
BYTE
BYTE
BYTE
BYTE
UDINT
REAL
If the FFT is a synchronous measurement, then the RPM value is also provided
in the SamplePeriodInSecs parameter. In that case, the two RPM values are
identical.
Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
Description
Subsecond accuracy
Seconds since 1970
Time period between samples or speed and number of samples per
revolution
Data source, mode, tacho source, and measurement units
If Bit 0 is set, phase array follows the mag array in the LineArray. Otherwise,
just the magnitude array.
Bits 1 and 2 indicate FFT scaling:
0 Peak, 1 Peak to Peak, 2 RMS
RPM value of the referenced speed source for the FFT data.
Actual RPM = Value/100
Value that is provided is a 24 bit (3 byte) integer.
First (least significant) byte, bits 0...7.
Second byte, bits 8...15
Last byte, bits 16...23
The size of the following array in bytes.
The array of FFT line amplitude data.
CIP Objects Appendix A
393