Allen-Bradley 1756-IF8I, User Manual

Page: 101 / 226

Rockwell Automation Publication 1756-UM540E-EN-P - December 2017 101
1756-OF8I Isolated Analog Output Module Chapter 5
That single controller behavior should result in the following:
1.
Output is not owned until the Claim connection is made.
2.
Any disruption in the Claim connection causes the I/O module to switch
to the Ready path.
3.
When the Claim connection recovers from the disruption, the I/O
module switches back to Claim.
Multiple Controller Behavior
For multiple controllers, the applications synchronize the behavior between the
controllers. Note Ethernet modules A and B, and RedundantOutputA and
RedundantOutputB.
Figure 32 - Multiple Controller
RUN PROG
REM
Logix5585E
NET
LINK
SAFETY ON
2
1
NET LNK2 OK LNK1
2
1
NET LNK2 OK LNK1
2
1
NET LNK2 OK LNK1
FLT
ST
FLT
ST
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
8 9 10 11 12 13 14 15
DC INTPUT
FLT
ST
FLT
ST
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
8 9 10 11 12 13 14 15
DC OUTPUT
ST
ST
0 1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
ANALOG INPUT
O
K
FLT
ST
FLT
ST
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
8 9 10 11 12 13 14 15
DC OUTPUT
ST
ST
0 1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
ANALOG INPUT
O
K
RUN PROG
REM
Logix5585E
NET
LINK
SAFETY ON
2
1
NET LNK2 OK LNK1
FLT
ST
FLT
ST
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
8 9 10 11 12 13 14 15
DC INTPUT
FLT
ST
FLT
ST
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
8 9 10 11 12 13 14 15
DC OUTPUT
ST
ST
0 1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
ANALOG INPUT
O
K
FLT
ST
FLT
ST
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
8 9 10 11 12 13 14 15
DC OUTPUT
ST
ST
0 1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
ANALOG INPUT
O
K
FLT
ST
FLT
ST
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
8 9 10 11 12 13 14 15
DC INTPUT
FLT
ST
FLT
ST
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
8 9 10 11 12 13 14 15
DC OUTPUT
ST
ST
0 1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
ANALOG INPUT
O
K
FLT
ST
FLT
ST
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
8 9 10 11 12 13 14 15
DC OUTPUT
ST
ST
0 1 2 3 4 5 6 7
8 9 10 11 12 13 14 15
ANALOG INPUT
O
K
32762-M
IMPORTANT If you use ControlLogix Redundancy as the multiple controller system, then you
do not have to manage the dual controllers. If you use any other method, then
you must manage the primary and secondary controllers yourself. This
application does not manage the controllers, just the I/O.