Change Detection Considerations for NI 6527 Devices

The Change Detection Overflowed attribute/property uses the change detection overflow circuitry on a DIO device to determine if an overflow occurred. The NI 6527 change detection overflow circuitry does not detect an overflow if a single rising edge and a single falling edge are detected prior to reading a sample. It will detect overflows if two rising edges or two falling edges occur prior to reading a sample.