Rockwell Automation Publication ICSTT-RM406J-EN-P - February 2021 83
Glossary
The following terms and abbreviations are used throughout this manual. For
definitions of terms not listed here, refer to the Allen-Bradley Industrial
Automation Glossary, publication AG-7.1
.
A
AADvance Workbench software A design, configuration, and maintenance software environment that enables
the design of a multi-controller safety strategy as a single project, and then
targets parts of the strategy for each controller.
AADvance-Trusted SIS Workstation
software
A software suite for building process control projects for use with Trusted®
Series 8000 controllers or AADvance® Series 9000 controllers.
accuracy The degree of conformity of a measure to a standard or a true value. See also
'resolution'.
achievable safe state A safe state that is achievable.
actuator A device which cause an electrical, mechanical or pneumatic action to occur
when required within a plant component. Examples are valves and pumps.
AITA Analogue input termination assembly.
alarms and events (AE) An OPC data type that provides time stamped alarm and event notifications.
allotted process safety time The portion of the total process safety time allotted to a sub function of that
process.
application The output binaries produced by the compiler included in the AADvance
Workbench software and AADvance-Trusted SIS Workstation software. Once
compiled, download the application to the controller.
architecture Organizational structure of a computing system which describes the
functional relationship between board level, device level and system level
components.
asynchronous A data communications term describing a serial transmission protocol. A start
signal is sent before each byte or character and a stop signal is sent after each
byte or character. An example is ASCII over RS-232-C. See also 'RS-232-C, RS-
422, RS-485'.
availability The probability that a system will be able to carry out its designated function
when required for use — normally expressed as a percentage.
NOTE Sometimes, a safe state cannot be achieved. An example is a
non-recoverable fault such as a voting element with a shorted
switch and no means to bypass the effect of the short.
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