Rockwell Automation 1775-S5_SR5,D17756.5.5 User Manual PLC-3 FAMILY I/0 - Manual (Page 16)

Scanner Hardware and Installation
Chapter 1
1-7
When a channel is configured for a communication rate of 230.4 kbps, the
corresponding terminator switch must be up away from the board. An
external 82 ohm terminator must be used in this configuration.
Figure 1.4
Setting a Terminator on a Communication Channel
When DOWN, a 150 ohm terminator is connected on
the corresponding communication channel.
15422
1 2 3 4
Up (away from board)
Down (toward board)
Setting the Protocol, Communication Rate, and Station Address for
Channel Four
On the top edge near the rear of the scanner are two sets of switches. You
can use these two sets of switches to set the protocol, communication rate,
and station address (Figure 1.5 and Figure 1.6).
You can set the protocol for:
DH link
DH+ link
I/O link
or LIST configurable (selections in the LIST set the protocol)
If you set the protocol switches for: Then you must specify the station address by:
DH or DH+ setting the set of eight switches next to the protocol
and communication rate switches.
list configurable using the station number selection in LIST. For
more information, see chapter 2.
You can set the communication rate to the following:
Select: For:
57.6 kbps I/O, peerĆtoĆpeer, backup, DH, or DH+ communication
115.2 kbps I/O, peerĆtoĆpeer, backup, or DH+ communication only
230.4 kbps I/O, peerĆtoĆpeer, or backup communications