Campbell-scientific SDM-SIO4 4-Channel Serial I/O Interface Manual do Utilizador descarregar pdf (Página 54)

Section 5. Programming the Datalogger

5-22

6: SDM-SIO4 (P113)

1: 1 Reps

2: 0 Address

3: 1 Send/Receive Port 1

4: 4 Command

5: 0 1st Parameters

6: 0 2nd Parameters

7: 2 Values per Rep

8: 1 Loc [ Voltage ]

9: 1.0 Mult

10: 0.0 Offset

;Only set the output flag when the voltage is

;greater than or equal to -99998.

7: IF (X<=>F) (P89)

1: 1 X Loc [ Voltage ]

2: 3 >=

3: -99998 F

4: 10 Set Output Flag High (Flag 0)

;Time stamp.

8: Real Time (P77)

1: 1111 Year,Day,Hour/Minute,Seconds

;Instantaneous values stored to final storage.

9: Sample (P70)

1: 2 Reps

2: 1 Loc [ Voltage ]

*Table 2 Program

02: 0.0000 Execution Interval (seconds)

*Table 3 Subroutines

End Program

Example CR10X Program using the Polling Method

This program will deal with sensors that send data at random intervals. The

program polls the SDM-SIO4 to see if data is available and only stores the data

then.

A typical filter that could be used is as follows:

fltst 200 "t[data]A5xff"

This filter works as follows:

t[data] – this filter waits for an exact string match before it starts the next filter.

In this case it is waiting for the sensor to send the string ‘data’.

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Campbell-scientific SDM-SIO4 4-Channel Serial I/O Interface Manual do Utilizador Página 54