Acromag TT339-0700, Руководство пользователя, Страница: 25 / 38

Model TT339-0700 4-Wire Isolated Frequency Transmitter w/USB
Acromag, Inc. Tel: 248-295-0880 [ 25 ] http://www.acromag.com
Flow Chart
No
Main
Loop
Input
Capture?
0Hz Cutoff
reached?*
Yes
No
Yes
Output Update
reached?
No
Reset 0Hz
Cutoff
Timer
Using
Technique A?
Yes
Increment
Capture
Count
No
Calculate time
between last
capture and add to
Cumulative Moving
Average (CMA)
Output
Update
Override?
No
Set
Measurement
to 0Hz
Yes
Calculate Frequency based
on Cumulative Moving
Average or Capture Count
and add to FIFO Queue
Set
Measurement to
FIFO Queue
Running Average
Update Output
based on scaled
Measurement
Yes
Reset Capture
Count and
Cumulative
Moving Average*
No
Using
Technique A?
Measurement
> 25KHz?
Measurement
< 20KHz?
Yes
No
Switch to
Technique B
Yes
Switch to
Technique A
Yes
No
*
No
if Output
Update
reached first
*Keep CMA
if no Input
Capture
since
previous
Output
Update