Rockwell Automation 1769-L31 CompactLogix Controller Installation Instructions - Manual (Page 18)

18 1769-L31 CompactLogix Controller
Publication 1769-IN069C-EN-P - May 2008
Using the Channel 0 Default Communication Push Button
The Channel 0 default communication push
button is located on the front of the controller
in the lower right corner as shown in the
illustration. Use the Channel 0 default
communication push button to change from
the user-defined communication
configuration to the default Communication
mode. The Channel 0 default communication
(DCH0) status indicator turns on (green,
steady) to indicate that the default
communication configuration is active.
Duplicate Packet (Message) Detect Enabled
ACK Timeout 50 (x 20 ms)
NAK Receive Limit 3 Retries
ENQ Transmit Limit 3 Retries
Data Bits 8
Stop Bits 1
IMPORTANT Only Channel 0 has a default communication push button.
IMPORTANT
The default communication push button is recessed.
Before pressing the default communication push button, be sure to note the
present communication configuration for Channel 0. Pushing the default
communication push button resets all configured parameters back to their
default settings.
To return the channel to its user-configured parameters, you must enter
them manually while online with the controller or download them as part of
an RSLogix 5000 software project file. To do this online with RSLogix 5000
software, access the Controller Properties dialog box and enter parameters
on the Serial Port, System Protocol, and User Protocol tabs.
Parameter Default