Specifications

Publication 1794-RM001F-EN-P - September 2011
3-8 FLEX I/O Modules
The input’s OK bit preconditions a Timer run that is preset to
accommodate an acceptable fault response time and any communication
filtering lags in the system. If the inputs miscompare for longer than the
preset value, a fault is registered with a corresponding alarm.
Figure 3.7
The control, diagnostics and alarming functions must be performed in
sequence.
Configuration parameters (for example, RPI, filter values) must be
identical between the two modules.
The same controller must own both modules.
Monitor the ControlNet status bits for the associated module and
ensure that appropriate action is invoked via the application logic by
these status bits.
Wire sensors to separate input channels on two separate modules that
are on different ControlNet nodes.
Timer done
Timer
Inputs Faulted
Alarm to Operator
Inputs OK
SUB
Delta
Input 1
Low Limit
ADD
Delta
Input 1
High Limit
MULT
Range
Tolerance %
Delta
Inputs Faulted
LIM
Low Limit
Input 2
High Limit
Inputs OK
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