SECTION 8. PROCESSING AND PROGRAM CONTROL EXAMPLES

FIGURE 8.3-1. AM416 Wiring Diagram For Thermocouple and Soil Moisture Block Measurements

EXAMPLE PROGRAM MULTIPLEXING

THERMOCOUPLES AND SOIL

MOISTURE BLOCK

*1 Table 1 Programs

01: 600 Sec. Execution Interval

01:P11 Temp 107 Probe

01:

1

Rep

02:

4

IN Chan

03:1 Excite all reps w/EXchan 1

04:1 Loc [:REF TEMP ]

05:

1

Mult

06:

0

Offset

02:

P86

Do

01:41 Set high Port 1

03:P87 Beginning of Loop

01:

0

Delay

02:

16

Loop Count

04:

P86

Do

01:72 Pulse Port 2

05:P14 Thermocouple Temp (DIFF)

01:

1

Rep

02:21 2.5 mV 60 Hz rejection Range

03:

1

IN Chan

04:1 Type T (Copper-Constantan)

05:1 Ref Temp Loc REF TEMP

06:2-- Loc [:TC TEMP#1]

07:

1

Mult

08:

0

Offset

06:P5 AC Half Bridge

01:

1

Rep

02:14 250 mV fast Range

03:

3

IN Chan

04:1 Excite all reps w/EXchan 1

05: 250

mV Excitation

06:18-- Loc [:SOIL M#1 ]

07:

1

Mult

08:

0

Offset

07:

P95

End

08:

P86

Do

01:51 Set low Port 1

09:P59 BR Transform Rf[X/(1-X)]

01:

16

Reps

02:18 Loc [:SOIL M#1 ]

03:.1 Multiplier (Rf)

10:

P92

If time is

01:

0

minutes into a

02:

60

minute interval

03:

10

Set high Flag 0 (output)

11:

P77

Real Time

01:

110

Day,Hour-Minute

12:

P71

Average

01:

33

Reps

02:1 Loc REF TEMP

8-4