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NI 9144 User Guide and Specifications

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NI 9403 Direction Control

The direction control field has one bit for each I/O pin, with bit 0 matching
channel 0, and so forth. 0 in the direction control indicates that I/O is an
input; 1 indicates an output.

Note

Both the input and output data is transmitted in the PDO regardless of the direction

control; only the relevant bits are connected to the I/O pins.

NI 9476

NI 9476 Error Status

If a channel over-current occurs on any of the 32 channels, the
corresponding bit in error status field is set to inform the user.

Table 65. NI 9476 Vendor Configuration Extensions

Index

Sub

Type

R/W

Description

0x2002

U32

Error Status,
sent as 8-bit PDO

0x2003

U32

Error
Acknowledge