2 rainfall intensity – Campbell Scientific CR7 Measurement and Control System User Manual
Page 84
SECTION 8. PROCESSING AND PROGRAM CONTROL EXAMPLES
8-2
04:
P54
Block Move
01:
9
No. of Values
02:
12
First Source Loc Temp i-8
03:
1
Source Step
04:
11
First Destin. Loc [:Temp i-9 ]
05:
1
Destination Step
05:
P86
Do
01:
10
Set high Flag 0 (output)
06:
P70
Sample
01:
1
Rep
02:
2
Loc 10smpl av
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 five 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 80 is used to send the one hour
average to Input Storage and again to send the
three hour average to Final Storage.
Input Location Labels:
1:AVG i-2
2:AVG i-1
3:AVG i
4:3 HR AVG
5:XX mg/M3
*
1
Table 1 Programs
01:
5
Sec. Execution Interval
01:
P2
Volt (DIFF)
01:
1
Rep
02:
8
5000 mV slow Range
03:
1
IN Card
04:
3
IN Chan
05:
3
Loc [:XX mg/m3 ]
06:
10
Mult
07:
0
Offset
02:
P92
If time is
01:
0
minutes into a
02:
60
minute interval
03:
10
Set high Flag 0 (output)
03:
P80
Set Active Storage Area
01:
3
Input Storage Area
02:
3
Array ID or location
04:
P71
Average
01:
1
Rep
02:
5
Loc
05:
P51
Spatial Average
01:
3
Swath
02:
1
First Loc AVG i-2
03:
4
Avg Loc [:3 HR AVG ]
06:
P80
Set Active Storage Area
01:
1
Final Storage Area
02:
25
Array ID or location
07:
P77
Real Time
01:
220
Day,Hour-Minute
08:
P70
Sample
01:
1
Rep
02:
4
Loc 3 HR AVG
09:
P91
If Flag
01:
10
0 (output) is set
02:
30
Then Do
10:
P54
Block Move
01:
2
No. of Values
02:
2
First Source Loc
03:
1
Source Step
04:
1
First Destination Loc [:AVG i-2 ]
05:
1
Destination Step
11:
P95
End
12:
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.