GE GFK-0787B Manuel D’Utilisation

tModular Redundancy Flexible Triple Modular Redundant (TMR) System 

an I/O Fault Reset be performed when any of the GMR CPUs are initialized, which will
cause any current I/O fault information  to  be  re–reported.

If manual output controls are used in a GMR system and the appropriate GMR Autotest
inhibit inputs are used to block faults created by the manual controls,  any standard
Genius type fault (open, overload, short, etc.) is also blocked during the time the inhibit
input is on.  It is therefore recommended that after the inhibit input is turned off, an I/O
fault reset be performed, which will cause any current I/O fault information to be
re–reported.

The following example shows some typical program startup logic. This is only an
example. You will probably need to modify the logic shown for your application.

These Program Blocks represent logic
routines that are appropriate for the
application.

In rung 11, the logic tests for Miscompare and System
Fault. If both are not 1, initialization continues.

An optional parallel input (MAN_COM in this example)
can be used to allow a “manual continue” input to be
supplied by an operator.