NI-9401 Vendor Configuration Extensions

The following table lists the vendor configuration extensions for the NI-9401.

Table 115. NI-9401 Vendor Configuration Extensions
Index Sub Type R/W Description
0x2001 0 U32 R/W Nibble direction control, default = 0

NI-9401 Direction Control

Table 111. NI-9401 Scan List Format
Bits Field
1

0: data bits <3..0> as input

1: data bits <7..4> as output

0
Note Both the input and output bytes are transmitted in the PDO regardless of the direction control; only the relevant bits are connected to the I/O pins.