
Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
393
CIP Objects
Appendix A
The Record Type Structures are as follows.
High and Low-Resolution Trend
(eHIGH_RES_TREND,
eLOW_RES_TREND, eHIGH_RES_ALARM, eLOW_RES_ALARM)
FFT
(eFFT, eFFT_ALARM)
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.
Table 120 - Record Type Structures
Byte Offset
Within Structure
Structure Member
Data Type
Description
0
TimestampNanoSec
UDINT
Subsecond accuracy.
4
TimestampSec
UDINT
Seconds since 1970.
8
Reserved
DWORD
12
Reserved
DWORD
16
Params0
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
Trend.StaticParams0…3.
20
Params1
DWORD
24
Params2
DWORD
28
Params3
DWORD
32
ByteCount
UDINT
The number of bytes in the data array. This is equal to the number of bits set in the
parameters Params0…Params3 (x4).
36
DataArray
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.
Table 121 - Record Type Structures
Byte Offset Within
Structure
Structure Member
Data Type
Description
0
TimestampNanoSec
UDINT
Subsecond accuracy
4
TimestampSec
UDINT
Seconds since 1970
8
SamplePeriodInSecs
REAL
Time period between samples or speed and number of samples per
revolution
12
identifier*
DWORD
Data source, mode, tacho source, and measurement units
16
ucDataSelect
BYTE
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
17
ucSpeedByte0
BYTE
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.
18
ucSpeedByte1
BYTE
Second byte, bits 8…15
19
ucSpeedByte2
BYTE
Last byte, bits 16…23
20
ByteCount
UDINT
The size of the following array in bytes.
24
LineArray
REAL
The array of FFT line amplitude data.
Содержание 1444-AOFX00-04RB
Страница 10: ...10 Rockwell Automation Publication 1444 UM001D EN P June 2018 Table of Contents Notes...
Страница 12: ...12 Rockwell Automation Publication 1444 UM001D EN P June 2018 Preface Notes...
Страница 198: ...198 Rockwell Automation Publication 1444 UM001D EN P June 2018 Chapter 5 Configure the Tachometer Expansion Module Notes...
Страница 210: ...210 Rockwell Automation Publication 1444 UM001D EN P June 2018 Chapter 7 Configure Relays Notes...
Страница 230: ...230 Rockwell Automation Publication 1444 UM001D EN P June 2018 Chapter 8 Configure Alarms Notes...
Страница 240: ...240 Rockwell Automation Publication 1444 UM001D EN P June 2018 Chapter 9 Trend and Transient Capture Notes...
Страница 316: ...316 Rockwell Automation Publication 1444 UM001D EN P June 2018 Chapter 10 Operate the Module Notes...
Страница 549: ......