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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 Dest. Loc [:Temp i-9 ]
05: 1 Destination Step
05: P86 Do
01: 10 Set high Flag 0 (output)
06: P70 Sample
01: 1 Reps
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 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 80 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 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: 25 2500 mV 60 Hz rejection
03: 3 IN Chan
04: 5 Loc [:XX mg/M3 ]
05: 10 Mult
06: 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 XX mg/M3
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 1
02: 25 Array ID or location
07: P77 Real Time
01: 110 Day,Hour-Minute
08: P70 Sample
01: 1 Reps
02: 4 Loc 3 HR AVG
09: P91 If Flag/Port
01: 10 Do if flag 0 (output) is high
02: 30 Then Do
10: P54 Block Move
01: 2 No. of Values
02: 2 First Source Loc AVG i-1
03: 1 Source Step
04: 1 First Dest. 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.
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.