2 rainfall intensity – Campbell Scientific TD Operating System Addendum for CR510, CR10X, and CR23X User Manual
Page 32
TD ADDENDUM—SECTION 8. PROCESSING AND PROGRAM CONTROL EXAMPLES
AD-8-2
05:
P84
Data Table
01:
0
Seconds into interval
02:
0
Every time
03:
0
Records (0=auto; -=redirect)
06:
P70
Sample
01:
1
Reps
02:
2
Loc smpl10avg
07:
P
End Table 1
In the above example, all samples for the
average are stored in input locations. This is
necessary when an average must be output
with each new sample. In most cases,
averages are desired less frequently than
sampling. For example, it may be necessary to
sample some parameter every 5 seconds and
output every hour an average of the previous
three hours' readings. If all samples were
saved, this would require 2160 input locations.
The same value can be obtained by computing
an hourly average and averaging the hourly
averages for the past three hours. To do this
requires that hourly averages be stored in input
locations.
Instruction 84 is used to send the 1 hour
average to Input Storage and again to send the
3 hour average to Final Storage.
Input Location Labels:
1:AVG_i2
2:AVG_i1
3:AVG_i
4: AVG_3_HR
5:XX_mg_M3
*
1
Table 1 Programs
01:
5
Sec. Execution Interval
01:
P2
Volt (DIFF)
01:
1
Rep
02:
25
2500 mV 60 Hz rejection Range
03:
3
IN Chan
04:
5
Loc [:XX_mg_M3 ]
05:
10
Mult
06:
0
Offset
02:
P84
Data Table
01:
0
Seconds into interval
02: 3600
Seconds interval
03:
-3
Records (0=auto; -=redirect)
03:
P71
Average
01:
1
Rep
02:
5
Loc XX_mg_M3
04:
P51
Spatial Average
01:
3
Swath
02:
1
First Loc AVG_i2
03:
4
Avg Loc [:Avg_3_HR ]
05:
P84
Data Table
01:
0
Seconds into interval
02: 3600
Seconds interval
03:
0
Records (0=auto; -=redirect)
06:
P70
Sample
01:
1
Reps
02:
4
Loc Avg_3_HR
07:
P92
If time is
01:
0
seconds into a
02: 3600
second interval
03:
30
Then Do
08:
P54
Block Move
01:
2
No. of Values
02:
2
First Source Loc AVG_i1
03:
1
Source Step
04:
1
First Destination Loc
[:AVG_i2 ]
05:
1
Destination Step
09:
P95
End
10:
P
End Table 1
8.2 RAINFALL INTENSITY
In this example, the total rain for the last 15
minutes is output only if any rain has occurred.
The program makes use of the capability to
direct the output of Output Processing
Instructions to Input Storage.
Every 15 minutes, the total rain is sent to Input
Storage. If the total is not equal to 0, output is
redirected to Final Storage Area 1, the time is
output and the total is sampled.
Input Location Labels:
1:Rain_mm
2: TOT_15mm
*
1
Table 1 Programs
01:
60
Sec. Execution Interval
01:
P3
Pulse
01:
1
Rep
02:
1
Pulse Input Chan
03:
2
Switch closure
04:
1
Loc [:Rain_mm ]
05:
.254
Mult
06:
0
Offset
02:
P86
Do
01:
21
Set low Flag 1