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Appendix C Register-Level Programmingt
© National Instruments Corporation C-5 PC-OPDIO-16 User Manual
Example:
Reading binary XXXXXXX1 at port B will imply a high on the VIN0, if proper signal
connections are done.
Table C-2. Input Sense Data
Value Read Channel Sensed
XXXXXXX1 High on VIN0
XXXXXX1X High on VIN1
XXXXX1XX High on VIN2
XXXX1XXX High on VIN3
XXX1XXXX High on VIN4
XX1XXXXX High on VIN5
X1XXXXXX High on VIN6
1XXXXXXX High on VIN7
For input and output specifications, refer to Appendix A, Specifications.
Power-up default: If no connections are made to the input of the optoisolator, the
PC-OPDIO-16 senses a low at the inputs.
Note: You should configure both ports before you begin reading from and writing to the port
because each time you configure one port it resets the other ports.