The I/O bit romanization which is used for input/output is differrent for each board.

e.g.) Bit romanization

PIO-32/32L(PCI)H: Input:I00 - I37, Output:O40 - O77

PIO-64/64L(PCI)H: Input:I00 - I77, Output:O80 - OF7

Logic bit is the number that I/O bits are numbered beginning from bit 0, in order to program. It needn't to care about the bit arrangement is different for each board.

When input and ouput, use the logic bit.

The above example is converted to logic bit as follows.

e.g.) Logic bit

PIO-32/32L(PCI)H: Input:0 - 31, Output:0 - 31

PIO-64/64L(PCI)H: Input:0 - 63, Output:0 - 63