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6
6-53GFK-0787B Chapter 6 Configuration
If the block will use Input Autotest, circuit 16 must be configured as an
output, as explained above. For circuit 16, Hold Last State must be
configured to NO.
If the block will use Input Autotest, circuit 16 must be configured with
Output Default set to ON.
Portions of the overall system can be configured for no CPU redundancy,
duplex redundancy, hot standby redundancy, or GMR mode. (See page 5-3
for information about how the configured Redundancy Mode affects Fault
Reporting by blocks in the GMR system).
For 16-circuit and 32-circuit DC blocks, select GMR mode for blocks that
will be part of input or output groups as described in this book.
Individual circuits on the blocks can be configured (using the GMR
Configuration Software) to utilize the special GMR features. GMR mode
can be selected even if there is just one block in an input group, and it
should use the extra diagnostics capabilities provided by GMR.
Select no redundancy for non-critical individual blocks that do not
require any type of redundancy.
The duplex CPU redundancy selection is for blocks on a bus with two
PLCs. This is not the same as duplex GMR redundancy. Conventional
duplex CPU redundancy, which is described in the Genius I/O System
User’s Manual does not provide autotesting, or the other special features
of GMR described in this book.
Hot standby CPU redundancy can be selected for blocks in a GMR
system. Instead of voting on CPU output data, blocks that are set up for
hot standby mode give preference to outputs received from bus
controller 31. Should outputs from 31 fail, a block in hot standby mode
starts using outputs received from bus controller 30. Finally, should
outputs from 30 fail, the block will use outputs from bus controller 29.
(Only the specific types of enhanced 16-circuit and 32-circuit DC discrete
blocks listed in this book are capable of receiving outputs from bus
controller 29. Other types of blocks can only receive outputs from bus
controllers 30 and 31.)
Hold Last
State
Output
Default
Redundancy
Mode