Rockwell Automation 1785-BCM_BEM, D17856.5.4 PLC-5 Backup Communication Module User Manual - Manual (Page 31)

Installing Your PLC-5 Backup System
Chapter 3
3-8
When: To this position: Set this switch:
switch 3 is always unused 3 OFF (opened)
switch 4 is always unused 4 OFF (opened)
1 To be compatible with 1785-BCM series A modules, you must set these switches as
shown. If you use this module with a series A module and do not set switch assembly
SW2 as shown, the LEDs on the series B module will flash.
2 This switch applies when both modules are 1785-BCM series B modules only.
The switch assembly SW2, located at the bottom of the 1785-BCM
series B module, has six switches. The function of the six switches is to
establish the configuration of Channels 1A and 1B of the module. Refer to
Figure 3.4 for the location of SW2.
Figure 3.4
1785-BCM Series B Switch Assembly SW2
Switch Assembly SW2
Bottom View
19086
Toggle pushed
toward top
OFF (open).
Toggle pushed
toward bottom
ON (closed).
Switches 1, 2, and 3 determine the configuration of Channel 1A. Switches
4, 5, and 6 determine the configuration of Channel 1B. These channels can
be configured for Data Highway Plus or Remote I/O mode, either with the
PLC-5 processor operating in adapter mode or in scanner mode.
The 1785-BCM series B module is shipped with Channel 1A configured
for Data Highway Plus and Channel 1B configured for Remote I/O ( to be
used with a processor in scanner mode set at 57.6 kbaud).
Refer to Table 3.F to configure Channels 1A and 1B using switch assembly
SW2 switches.