SDM-SIO4 User Guide

;if value returned from poll is >=1 then data must be available.

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

1: 2

X Loc [ poll

]

2: 3

>=

 

3:

1

F

 

4:

30

Then Do

 

;get voltages into locations 3 and 4 if poll was true.

8: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

8:3 Loc [ voltage1 ]

9:1.0 Mult

10:0.0 Offset

;set the output flag so the data can be store to final storage.

9:Do (P86)

1:10 Set Output Flag High (Flag 0)

;time stamp.

10:Real Time (P77)

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

;Instantaneous value stored into final storage.

11:Sample (P70)

1:

2

Reps

2:

3

Loc [ voltage1 ]

;end of IF.

12:End (P95)

*Table 2 Program

02: 0.0000 Execution Interval (seconds)

*Table 3 Subroutines

End Program

Example CR10X Program using Interrupts

Sensors with fast data output or where very close time stamping is required would need to be read using the hardware interrupt output from the SDM-SIO4 in combination with an interrupt-driven subroutine in the datalogger (only the CR10/10X currently support this mode). This output on the SDM-SIO4 pulses high when there is data available from one of the serial ports.

This program will deal with sensors that send data at random intervals. It uses the IO line to cause an interrupt to the datalogger program if data is available. The IO line is always automatically pulsed by the SDM-SIO4 when data is available

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Image 52
Campbell Hausfeld SDM-SIO4 Example CR10X Program using Interrupts, Get voltages into locations 3 and 4 if poll was true