Campbell 21X Instrukcja Operatora Pobierz pdf (Strona 82)

SECTION 8. PROCESSING

AND PROGRAM

CONTROL

EXAMPLES

While

of

questionable

value

because

of

current

requirements

and

strip chart reliability,

some

archaic

regulations require

strip

chart backup on

weather data. The

SDM-AO4

may be

used

with

the 21X to

provide

an additional

four

continuous

analog outputs for

strip charts. The

output

values

in

this

example

are wind

speed, wind

direction, ai r tempe

rature,

and so larradiation.

lnstruction

103 is used

to activate

the SDM-AO4.

The

4 millivolt values

to output must

be stored in

adjacent

Input

Storage

locations,

the first of

which is referenced in

Instruction

103.

The

following

program

measures

the

sensors

every

5 seconds.

The

readings

are moved to

another 4

locations

and scaled to

a 0 to

1000

millivolt

output

for

the

SDM-AO4. Wind

direction

is

changed

from

a 0-360

degree input

to

output

representing 0

to 540 degrees. This

conversion

is

done in

a subroutine

which is

described

in

the

next

example.

The

example

also includes instructions

to

output wind vector

and average

temperalure

and solar

radiation

every hour.

Input

location

Assignments:

1:WS

2:0-360

WD

3:Ta

4:SR

S:WS output

6:0-540

out

7:Ta

output

8:SR

output

10:0-540

WD

Table

1 Programs

Sec, Execution Interval

Pulse

Rep

Pulse

Input

Chan

Switch

closure; Output

Hz.

Loc

[:WS 1

Mult

Offset

Excite, Delay,Volt(S

E)

Rep

500 mV fast

Range

lN

Chan

Excite

all reps w/EXchan 1

Delay

(units

.01sec)

06: 1000

07: 2

08:

.72

09: 0

mV

Excitation

Loc

[:0-360

WD

]

Mult

Offset

Temp 107 Probe

Rep

lN

Chan

Excite

all reps w/EXchan 2

Loc

[:Ta 1

Mult

Offset

Volt

(DIFF)

Rep

15 mV

slow Range

03: P11

01: 1

02:

2

03:

2

04; 3

05: 1.8

06: 32

04: P2

01: 1

02:

2

.-.'03:

3

04: 4

05:

06: 0

05: P92

01: 0

02:

60

03: 10

06: P54

01: 4

02: 1

03: 1

04:

5

lN Chan

Loc

[:SR

.14493

Mult

Otfset

*1

01: 5

01: P3

01:

1

02: 1

03: 22

04:

1

05:

1.789

06:

1

09: P103

01: 4

02:

30

03:

5

02: P4

01: 1

02: 14

03:

1

04:

1

05: 2

05: 1

07: P86

01: 1

08: P53

01: 5

02: 10

03: 0

04:

1.8519

05: 0

06:

I

07: 25

08: 1000

09:

0

10: P92

01:

0

lf time is

minutes into

a

minute interval

Set high Flag

0

(output)

Block Move

No. of Values

First

Source Loc WS

Source Step

First Destination

Loc

[:WS

outputl

Destination

Step

Do

CallSubroutine 1

Scaling Array

(A.loc

+B)

Start Loc

[:WS

output]

A1

B1

A2

B2

A3

B3

A4

B4

SDM-Ao4

(OSX-o,-1)

Reps

Address

Loc

WS output

lf time is

minutes into

a

8-6

1 2 ... 77 78 79 80 81 82 83 84 85 86 87 ... 190 191

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