Campbell-scientific SDM-IO16 16-Channel Input/Output Expansion Module Manuel d'utilisateur télécharger pdf (Page 30)

SDM-IO16 16 Channel Input/Output Expansion Module

*Table 2 Program

02: 0.0000 Execution Interval (seconds)

*Table 3 Subroutines

End Program

7.3 A CR10X Program which Measures Four Frequency Inputs

(Anemometers) and Four Switch Closure Inputs (Rain

Gauges)

This program can also be used with a CR23X datalogger.

;{CR10X}

;An example that shows initial setup with frequency measurement

;on four ports and pulse counting, with switch closure, on the next

;four. In this example the four frequencies are anemometers and

;the switch closures are raingauges that need to be totalised

;

*Table 1 Program

01: 5 Execution Interval (seconds)

;First configure the IO16 if not already done

;If flag 1 is not set, i.e. the program has just

;been compiled or datalogger powered up.

;This code is needed primarily to enable switch debounce filtering

;on channels 4..8

1: If Flag/Port (P91)

1: 21 Do if Flag 1 is Low

2: 30 Then Do

; Call instruction 188 to set the ports up

2: SDM-IO16 (P188)

1: 0 SDM Address

2: 90 Command Code Option ;configure the ports

3: 9999 Ports 16-13 ;Leave the last 8 ports as they are

4: 9999 Ports 12-9

5: 3333 Ports 8-5 ;Set ports 5..8 as switch closure

6: 2222 Ports 4-1 ;Set ports 1..4 as normal inputs

7: 1 Return Code Loc [ ErrCount ]

8: 2 First Loc [ Windspd_1 ]

9: 1.0 Mult

10: 0.0 Offset

;Set flag 1 high to indicate we have run the setup code

3: Do (P86)

1: 11 Set Flag 1 High

4: End (P95) ; of IF block

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 43 44

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Campbell-scientific SDM-IO16 16-Channel Input/Output Expansion Module Manuel d'utilisateur Page 30