Campbell Hausfeld Serial I/O Interface SDM-SIO4 - Manual (Page 52)

SDM-SIO4 User Guide
5-22
;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