CR1000 Manual - Campbell Scientific

Section 7. Installation
FlagsBool8(1) = Flags AND &HFF 'AND 1st 8 bits of "Flags" & 11111111
FlagsBool8(2) = (Flags >> 8) AND &HFF 'AND 2nd 8 bits of "Flags" & 11111111
FlagsBool8(3) = (Flags >> 16) AND &HFF 'AND 3rd 8 bits of "Flags" & 11111111
FlagsBool8(4) = (Flags >> 24) AND &HFF 'AND 4th 8 bits of "Flags" & 11111111
CallTable(Bool8Data)
NextScan
EndProg
7.8.12 Faster Measurement Rates
Certain data acquisition applications require the CR1000 to make analog
measurements at rates faster than once per second (> 1 Hz (p. 456) ). The CR1000
can make continuous measurements at rates up to 100 Hz, and bursts (p. 448) of
measurements at rates up to 2000 Hz. Following is a discussion of fast
measurement programming techniques in association with VoltSE(), single-ended
analog voltage measurement instruction. Techniques discussed can also be used
with the following instructions:
VoltSE()
VoltDiff()
TCDiff()
TCSE()
BrFull()
BrFull6W()
BrHalf()
BrHalf3W()
BrHalf4W()
The table Summary of Analog Voltage Measurement Rates (p. 232), summarizes the
programming techniques used to make three classes of fast measurement: 100-Hz
maximum-rate, 600-Hz maximum-ate, and 2000-Hz maximum-rate. 100-Hz
measurements can have a 100% duty cycle (p. 453). That is, measurements are not
normally suspended to allow processing to catch up. Suspended measurements
equate to lost measurement opportunities and may not be desirable. 600-Hz and
2000-Hz measurements (measurements exceeding 100 Hz) have duty cycles less
than 100%.
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