National Instruments CAN 372139B-01 - Manual (Page 48)

Chapter 5 Automotive Diagnostic Command Set API for LabVIEW
Automotive Diagnostic Command Set User Manual 5-22 ni.com
OBD Open.vi
Purpose
Opens an OBD-II diagnostic session on a CAN port.
Format
Input
CAN interface specifies the CAN interface on which the diagnostic
communication should take place. The values are CAN0, CAN1, and so on.
baudrate is the diagnostic communication baud rate.
error in is a cluster that describes error conditions occurring before the VI
executes. If an error has already occurred, the VI returns the value of the
error in cluster to error out.
status is TRUE if an error occurred. This VI is not executed when
status is TRUE.
code is the error code number identifying an error. A value of 0
means success. A negative value means error: the VI did not
execute the intended operation. A positive value means warning:
the VI executed intended operation, but an informational warning
is returned. For a description of the code, wire the error cluster
to a LabVIEW error-handling VI, such as the Simple Error
Handler.
source identifies the VI where the error occurred.