Rockwell Automation 1785-BCM_BEM, D17856.5.4 PLC-5 Backup Communication Module User Manual User Manual
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Index
I-2
data table data transfer
method of, 5-3
sequence of, 5-3
data transfer
data in the data table, 5-2
overview, 1-5
remote input data, 5-1
default communication mode, 2-4
diagnosing faults
with bits of auxiliary
diagnostic/status word, 8-6
with bits of the system status
word, 8-4
with status indicators, 8-1
diagnostic instructions, 7-11
disconnecting failed PLC-5
backup system, 5-18
discrete I/O delay, B-1
divergence, 6-3
E
editing on-line, 5-20
electrostatic discharge
information, 3-5, 4-9
F
fast data transfer mode
FIFO instructions, 7-11
file copy and fill instructions, 7-11
forcing I/O, 6-4
formula, for determining discrete
I/O delay, B-1
H
hardware
1785-BCM module, 2-1
PLC-Backup System, 1-2
high speed serial link, description
of, 2-4
I
I/O backplane interface, 2-7
I/O chassis switches, 3-4, 4-7
I/O rack timing, 6-2
input signal speed, 6-1
Input signal update time, 6-2
inserting the 1785-BCM module
into the chassis, 3-9
inserting the 1785-BEM module
into the chassis, 4-11
K
keying the I/O chassis
1785-BCM module, 3-6
1785-BEM module, 4-9
M
message instructions, 7-12
minimum program to transfer data
table data, 7-1
O
operation of PLC-5 backup
system, 5-13
P
packet length word, 5-9
PID control files, 7-12
PLC-5 backup system
configuration, 3-2
disconnecting failed system,
5-18
how the system works, 1-5
operation of, 5-13
powering-up the system, 5-18
restarting a repaired system,
5-19
starting up the system, 5-17
power supply requirements
with 1785-BCM modules, 3-3
with 1785-BEM modules, 4-6
powering up the PLC-5 backup
system, 5-18
primary program, 5-14