Rockwell Automation 1747-ACNR15 ControlNet Adapter Module User Manual - Manual (Page 44)

Publication 1747-UM003A-EN-P
4-16 Application Examples
The Connection Name, by default, is Discrete 16-Bit Exclusive Owner. Change
this to Discrete 32-bit Exclusive Owner. The first available I/O addresses are
I:3.1 and O:3.1, where the 1747-SCNR is in slot 3 of the processor chassis.
The first available starting I/O addresses have been placed into the Input
Address and Output Address fields, because automatic addressing was previously
selected in the Auto Address Preference screen. Words I:3.0 and O:3.0 are used
for status and control data.
Note that the input data from the 1746-IA16 is found in the processor’s input
image word I:3.3 and the output data written to the 1746-OB16 module is
from the processor’s output image word O:3.3. The 1746-NIO4V input data
is in I:3.7 and I:3.8, and the output data is in O:3.5 and O:3.6.
IMPORTANT
RSNetWorx allows more than one exclusive owner rack
connection type to be configured to a 1747 adapter (e.g.
8-bit exclusive owner, 16-bit exclusive owner, and 32-bit
exclusive owner), however only one exclusive owner rack
connection can be operational at one time. It is
recommended that only one exclusive owner rack
connection type be configured to the adapter to avoid
contention between multiple connections.
IMPORTANT
If a rack connection type is changed to a smaller bit
configuration e.g. 32-bit to 16-bit, or 16-bit to 8-bit, the
unused bits for the new connection remains in their
previously programmed states for program mode or lost
communications e.g. last state, safe state, reset off.