National Instruments Deterministic Ethernet Expansion Chassis NI 9144 - Manual (Page 64)

NI 9144 User Guide and Specifications 64 ni.com
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 0 U32 R Error Status,
sent as 8-bit PDO
0x2003 0 U32 W Error
Acknowledge