Rockwell Automation 1775-S5_SR5,D17756.5.5 User Manual PLC-3 FAMILY I/0 - Manual (Page 30)

Configuring the Scanner through LIST
Chapter 2
2-4
Operating Mode
You can select one of the following operating modes for the corresponding
communication channel:
inactive
I/O scan
peer-to-peer master
peer-to-peer slave
backup communications
DH communications (channel 4 only)
DH+ communications (channel 4 only)
These selections identify what the channel is being used for. The default is
I/O scan.
An asterisk (*) displays next to the current mode of the channel. To
change the mode, you select the number that corresponds to the desired
mode and reconfigure the channel.
For channel 4, the protocol switch must be selected for LIST configurable
for you to change the operating mode through LIST (refer to “Setting the
Protocol, Communication Rate, and Station Address for Channel Four,”
page 1-7).
Important: If you are not using a communication channel, set the
operating mode for the channel to inactive. This causes the scanner to stop
communicating through the channel improving the communication times
on the other active channels.
Auto Configuration
Auto configuration first creates a new I/O chassis list in which each I/O
chassis has equal priority with no attributes assigned. Then the scanner
reconfigures.
The scanner performs an auto configure at power-up for an
I/O-scan-configured channel that has no entries in its I/O chassis scanning
sequence list.
When forming the I/O chassis list during an auto configuration, the scanner
polls all valid addresses. If the scanner receives response to an address, it
adds that address to the list. To assign attributes or priorities to the I/O
chassis, add them manually through LIST and reconfigure the channel.