Rockwell Automation 1785-BCM_BEM, D17856.5.4 PLC-5 Backup Communication Module User Manual - Manual (Page 156)

Index
I-1
Numbers
1785-BCM module
communication links, 2-2
compatibility, 1-7
customer relay, 2-5
features and capabilities, 1-6
hardware, 2-1
installation procedures, 3-5
relays, 2-4
series A module differences,
C-1
smart switch interface, 6-7
status indicators, 2-1
switch assemblies, 2-6
system status word, 5-6
wiring arm, 2-2
1785-BEM module, 4-1
backup expansion, 1-7
communication links, 4-3
communication ports, 4-4
connecting channels, 4-12
customer relay, 4-5
I/O backplane interface, 4-6
installation procedures, 4-7
setting the switch assembly,
4-10
status indicators, 4-1
switch assembly, 4-6
wiring arm, 4-2
A
answers to PLC-5 backup system
questions, B-1
audience, i
auxiliary diagnostics/status word,
5-9
channel configurations word
two, 5-11
module extended status word
one, 5-10
B
backup expansion module, 1-7,
4-1
backup system concepts, 1-1
bit displacement instructions, 7-11
block id word
in BTR instruction, 5-7
in BTW instruction, 5-9
block transfer instructions
description of, 5-5
programming considerations,
7-12
block transfer read instruction, 5-5
block transfer write instruction,
5-8
C
common questions for a PLC-5
backup system, B-1
communication links
configurable ports, 2-2
description of, 2-4
figure of, 2-3, C-2
configurable channels, 2-2
connecting, 1785-BCM modules,
3-10
counter instructions, 7-10
customer relay, 2-5, 4-5
D
Data Highway Plus
connections, 3-16
switching
description of, 6-4
scenarios, 6-6
data integrity, 6-10
switchover diagnostics, 6-11
data table
BTR instruction, 5-5
BTW instruction, 5-8
considerations, 6-9
transfer time, 6-2