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Rockwell Automation Publication 1444-UM001D-EN-P - June 2018
Appendix A
CIP Objects
Reading TWF Data
Processing the returned data into the TWF is merely a matter of determining
the period, RPM, and number of samples (if synchronous) of the data. The
data values themselves are returned as floating point values that need no further
processing. The following describes how to calculate the period of the TWF.
Asynchronous Measurements
Calculate the time waveform period:
Synchronous Measurements
Calculate the number of samples:
Read the Samples per Revolution (SamplesPerRev):
Samples per Revolution is returned in the first bye of the
SamplePeriodInSec
value
Read the RPM in Hz (RPM
Hz
):
RPM in Hz is returned in the last three bytes of the SamplePeriodInSec
value
Calculate the time waveform period:
TWF Period (sec) =
SamplePeriodInSec
*
ByteCount
4
NumSamples=
ByteCount
4
TWF Period (sec) =
NumSamples
RPM
Hz
* SamplesPerRev
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...
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