Rockwell Automation 1775-S5_SR5,D17756.5.5 User Manual PLC-3 FAMILY I/0 - Manual (Page 17)

Scanner Hardware and Installation
Chapter 1
1-8
Not all DH+ stations are capable of operating above 57.6 kbps. You must
reference the appropriate users manual for the maximum communication
rate for each device.
ATTENTION: Channel 4 may not be configured for DH or
DH+ when operating any of the other communication channels
at 230.4 kbps. Otherwise, I/O rack retries and missing inputs in
a listen only mode backup system may result.
Figure 1.5
Setting the Protocol, Communication Rate, and Station Address for
Channel Four
Protocol
Switch
4 3
DH
DH+
I/O scan
Configurable
through LIST
down down
down
up
up
up
down
up
Communication
Switch
2 1 Rate (bps)
57.6k down down
115.2k down up
1 2 3 4
230.4k down up
Up (away from board)
Down (toward board)
If you set the protocol switches for DH or DH+ communication, you must
set the station number (Figure 1.6). Valid station numbers range from 000
to 376 octal for DH and 00 to 77 octal for DH+.
Switch numbers: correspond to the:
7 and 8 first digit (MSD) 1
4, 5 and 6 second digit
1, 2 and 3 third digit (LSD) 2
1 MSD = Most Significant Digit
2 LSD = Least Significant Digit