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6
6-49GFK-0787B Chapter 6 Configuration
Configuring GMR Bus Controllers and I/O Blocks
Each bus controller that serves the same input and/or output groups is configured similarly;
so it is usually easiest to copy the first completed bus/bus controller in a group to configure
the other bus controller(s) in the same group. Any additional changes can be made to the
individual bus controller/bus configurations as needed (for example, to accommodate
non-voted I/O on a bus, or the “D” block of a 4-block output group.
GMR redundant input blocks in a group each have a unique “raw” data address on each bus
in the same PLC. However, the blocks have the same reference addresses in another GMR
PLC.
GMR redundant outputs in a group have the same reference addresses on each bus in the
group.
%I11265
31
31
31
31
31
31
%I11521 %I11777
Bus C
Bus A
30
30
30
30
30
30
Bus B
PLC A
PLC B
29
29
29
29
29
29
PLC B
%Q12033 %Q12033
%Q12033 %Q12033
AB C A B
CD
Input blocks in a group are at
different “raw” data addresses
Output blocks in a group are
at the same physical address