Rockwell Automation 1785-Lxxx Enhanced and Ethernet PLC-5 Programmable Controllers - Manual (Page 171)

Publication 1785-UM012D-EN-P - July 2005
Communicating with Devices on a Serial Link 10-21
Configure Channel 0 for a Communication Mode Change
You can configure channel 0 so that it switches from one communication
mode to another upon receiving a control command. You define a mode
attention character and either a system or user mode character.
Every time the controller receives the mode attention character and either a
system or user mode character, channel 0’s communication mode will be
switched to the new mode.
To configure channel 0 for a remote communication-mode change, follow the
steps on the left:
The Mode Attention character tells the controller to expect a communication
mode change. If you are using a control character, enter the ASCII equivalent
in hexadecimal. With other characters, just enter the character. Do one of the
following:
Enter the character you want to use to tell the controller to switch
communication modes for channel 0. If you are using a control character, use
the ASCII equivalent in hexadecimal. With other characters, just enter the
character.
Character Tells the Controller to Default Character
Mode attention character expect a change communication mode
command [Esc]
System mode character switch the communication mode to
system mode S
User mode character switch the communication mode to the
user mode U
If You Want To Select
Change the communication mode of channel 0 remotely ENABLE
Not change the communication mode of channel 0
remotely DISABLE
IMPORTANT
Make sure the remote mode change option is disabled if
you do not want to change channel 0’s communication
mode over a remote link. Having the mode disabled
prevents an unexpected communication mode change.