National Instruments CAN 372139B-01 - Manual (Page 119)

Chapter 5 Automotive Diagnostic Command Set API for LabVIEW
© National Instruments Corporation 5-93 Automotive Diagnostic Command Set User Manual
UDS ReadMemoryByAddress.vi
Purpose
Executes the UDS ReadMemoryByAddress service. Reads data from the ECU memory.
Format
Input
diag ref in specifies the diagnostic session handle, obtained from Open
Diagnostic.vi and wired through subsequent diagnostic VIs. Normally, it is
not necessary to manually manipulate the elements of this cluster.
address defines the memory address from which data are to be read. Only
three bytes are sent to the ECU, so the address must be in the range
0–FFFFFF (hex).
size defines the length of the memory block to be read.
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.