Rockwell Automation 1771-CFM,D17716.5.99 CONFIGURABLE FLOWMET - Manual (Page 54)

5–4 Interpret Module Status and Input Data
Publication 1771Ć6.5.99 - December 1995
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Percent of Full Scale (Rate % of High RPM value) Ċ
the calculated frequency scaled by the Highest
Allowable Frequency (BTW 8, 18, 28, 38) and then
expressed as a number from 0 to 32,767.
word 5 (Channel 0)
word 15 (Channel 1)
word 25 (Channel 2)
word 35 (Channel 3)
word 6 (Channel 0)
word 15 (Channel 1)
word 24 (Channel 2)
word 33 (Channel 3)
0 = 0%
32, 767 ≥ 100%
% = BTR word 6,15,24,33 / 32,767
For example, if:
BTW word 5 Ċ bit 12, 4 x Highest Hertz = 1 (ON)
bit 15, Frequency in 10ths = 0 (OFF)
BTW word 8 Ċ Highest Allowable Frequency = 21,750Hz
BTR word 7 = 1
BTR word 8 = 1410
word 8 (channel 0)
word 17 (channel 1)
word 26 (channel 2)
word 35 (channel 3)
word 7 (channel 0)
word 16 (channel 1)
word 25 (channel 2)
word 34 (channel 3)
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Frequency indicates the calculated frequency.
RANGE: 0Ć120,000
If Frequency in 10ths (word 5,15,25,35 Ċ bit 15) is:
not set Ċ MSD range = 0Ć12 x 10,000 / LSD range = 0Ć9,999
Example: If word 7 = 6 and word 8 = 532, Frequency = 6(10,000) + 532 = 60,532
set Ċ MSD range = 0Ć120 x 1,000 / LSD range = 0Ć9,999 x 0.10
Example: If word 7 = 6 and word 8 = 532, Frequency = 6(1,000) + 532(0.10) = 6,053.2
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MSD Ć
range depends on
status of Frequency in 10ths
(BTW word 5,15,25,35 bit 15)
and mode of operation
LSD Ć range depends
on status of BTW
Frequency in 10ths bit
all
HR
Frequency = 11,410Hz
Percent Full Scale (BTR 6) = 32,767
(21,750 x 4) / 11,410
Percent Full Scale (BTR 6) = 4,297
T, NRT, HR