Allen-Bradley 1756-L6 Series, Reference Manual, Page: 67 / 134

Rockwell Automation Publication 1756-RM001I-EN-P - May 2012 67
FLEX I/O Modules Chapter 6
Figure 37 - Logic for Comparing Analog Input Data
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.
•
Wire sensors to separate input points on two separate modules that are on
different network nodes.
• Monitor the network status bits for the associated module and make sure
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 network 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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