28 Rockwell Automation Publication 1769-UM011H-EN-P - April 2012
Chapter 2 Install the 1769-L3x Controllers
Use the Channel 0 Default Communication Push Button
The Channel 0 default communication push button is
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.
Make Ethernet Connections
to the Controller
The 1769-L32E and 1769-L35E controller are shipped with the BOOTP utility
enabled. You must assign an IP address to the Ethernet port for the controller to
communicate over an EtherNet/IP network.
Error Detection BCC
Embedded Responses Auto Detect
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
Only Channel 0 has a default communication push button.
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 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
WARNING: If you connect or disconnect the communication cable with power
applied to this module or any device on the network, an electrical arc can occur.
This could cause an explosion in hazardous location installations.
Be sure that power is removed or the area is nonhazardous before proceeding
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