86 Rockwell Automation Publication ICSTT-RM406J-EN-P - February 2021
dictionary The set of internal input and output variables and defined words used in a
program.
discrepancy A condition that exists if one or more of the elements disagree.
DITA Digital input termination assembly.
DOTA Digital output termination assembly.
E
element A set of input conditioning, application processing and output conditioning.
energize to action A safety instrumented function circuit where the outputs and devices are de-
energized under normal operation. Application of power activates the field
device.
EUC Equipment Under Control. The machinery, apparatus or plant used for
manufacturing, process, transportation, medical or other activities.
expansion cable assembly A flexible interconnection carrying bus signals and power supplies between
AADvance base units, available in a variety of lengths. Used in conjunction
with a cable socket assembly (at the left hand side of a base unit) and a cable
plug assembly (at the right hand side of a base unit).
F
fail operational state A state in which the fault has been masked. See 'fault tolerant'.
fail safe The capability to go to a pre-determined safe state in the event of a specific
malfunction.
fault reset button The momentary action push switch located on the front panel of the 9110
processor module.
fault tolerance Built-in capability of a system to provide continued correct execution of its
assigned function in the presence of a limited number of hardware and
software faults.
fault tolerant The capability to accept the effect of a single arbitrary fault and continue
correct operation.
fault warning receiving station A centre from which the necessary corrective measures can be initiated.
fault warning routing equipment Intermediate equipment which routes a fault warning signal from the control
and indicating equipment to a fault warning receiving station.
field device Item of equipment connected to the field side of the I/O terminals. Such
equipment includes field wiring, sensors, final control elements and those
operator interface devices hard-wired to I/O terminals.
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