90 Rockwell Automation Publication ICSTT-RM406J-EN-P - February 2021
P
peer to peer A Peer to Peer network consists of one or more Ethernet networks connecting
together a series of AADvance and/or Trusted® controllers to enable
application data to be passed between them.
pinging In MODBUS communications, sending the diagnostic Query Data command
over a link and by receiving a reply ensuring that the link is healthy and the
controller is able to communicate with the master. No process data is
transferred or modified. In the case of slave devices that will not support
pinging then the Standby command will default to Inactive state, but no error
will be returned.
portable equipment Enclosed equipment that is moved while in operation or which can easily be
moved from one place to another while connected to the supply. Examples are
programming and debugging tools and test equipment.
process safety time (PST) For equipment under control this represents the period of time a dangerous
condition can exist without the protection of a safety instrumented system
before a hazardous event occurs.
processor base unit A backplane assembly which holds all of the processor modules in an
AADvance controller. Part number 9100. See also 'processor module'.
processor module The application execution engine of the AADvance controller, housed in a self-
contained and standardized physical form factor.
producer A controller producing a tag to one or more consumers, at the request of the
consumers.
program enable key A security device that protects the application from unauthorized access and
change, in the form factor of a 9-way 'D' type plug. Part number 9906. Supplied
with the processor base unit. See also 'key connector'.
project Contains the source of the applications compiled by the AADvance Workbench
software or AADvance-Trusted SIS Workstation software.
proof test A periodic test performed to detect dangerous hidden faults in a safety
instrumented system (SIS) so that, if necessary, a repair can restore the system
to an 'as new' condition or as close as practical to this condition.
protocol A set of rules that is used by devices (such as AADvance controllers, serial
devices and engineering computers) to communicate with each other. The
rules encompass electrical parameters, data representation, signalling,
authentication, and error detection. Examples include MODBUS, TCP and IP.
Proof tests are designed to reveal both Systematic and Random failures,
Proof tests may be required depending on how the technology has been
implemented.
AADvance product data is given for a Useful Life of 20 years. For a Mission
Time of up to 20 Years, proof testing is not required. For Mission Times
greater than 20 years, any products that are still in service once that time is
reached should be replaced.
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