Campbell Scientific CR800 and CR850 Measurement and Control Systems - Manual (Page 232)

Section 7. Installation
232
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 CR800 to make analog
measurements at rates faster than once per second (> 1 Hz
(p. 433)
). The CR800
can make continuous measurements at rates up to 100 Hz, and bursts
(p. 426)
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. 233),
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. 430).
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%.