Allen-Bradley 1756-CFM, Руководство пользователя

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50 Rockwell Automation Publication 1756-UM010C-EN-P - June 2021
Chapter 3 Configurable Flowmeter Module Features and Operational Modes
• If the input frequency is greater than 300Hz, the K-factor used
is always 100.0. There is no K-factor calculation over 100Hz.
To use Gross Rate, you must set the K-factor values in Module Tags, as shown.
Net Rate
Use Net Rate to convert Net Volume to a rate by using this equation:
Fill Total Target
Fill Total Target is the user-defined final volume (in engineering units) for a
total fill.
Name Style Data type Value Change during operation
C.Operations[0].kFactStruct.kFactorForChan[0] Float REAL
25.0
1
Yes
C.Operations[0].kFactStruct.kFactorForChan[1] Float REAL
25.0
1 Yes
C.Operations[0].kFactStruct.kFactorForChan[2] Float REAL 71.0 Yes
C.Operations[0].kFactStruct.kFactorForChan[3] Float REAL 111.0 Yes
C.Operations[0].kFactStruct.kFactorForChan[4]-
C.Operations[0].kFactStruct.kFactorForChan[12]
Float REAL 0 Yes
C.Operations[0].kFactStruct.FreqAtKFactor[0] Float REAL 0.0 Yes
C.Operations[0].kFactStruct.FreqAtKFactor[1] Float REAL 100.0 Yes
C.Operations[0].kFactStruct.FreqAtKFactor[2] Float REAL 200.0 Yes
C.Operations[0].kFactStruct.FreqAtKFactor[3] Float REAL 300.0 Yes
C.Operations[0].kFactStruct.FreqAtKFactor[4]-
C.Operations[0].kFactStruct.FreqAtKFactor[12]
Float REAL 0 Yes
1
To avoid discontinuity when interpolating Gross Rate, make sure the values in C.Operations[0].kFactStruct.kFactorForChan[0] and
C.Operations[0].kFactStruct.kFactorForChan[1] match.
IMPORTANT For more information on setting values in the Module Tags, see
Configure the Configurable Flowmeter Module on page 69 .
Net Rate =
Total Counts in Meter Sample
Sample Interval K-factor
x
Meter Factor
x CCF