Rockwell Automation T8094 8000 Series TMR System Safety Manual - Manual (Page 14)

SAFETY MANUAL
D oc N umber T8094
I ssue 27 – June 2013
Page xi v
SIL Safety Integrity Level. One of four possible
discrete levels for specifying the safety integrity
requirements of the safety functions to be
allocated to the safety-related systems. SIL4
has the highest level of safety integrity; SIL1 has
the lowest.
Slot A slot is the term given to the physical
allocation of a module within a 483mm (19 inch)
frame.
SmartSlot Spare module slot position wired, and
configured to enable any one of a number of
modules of the same type to be ‘hot’ replaced as
necessary.
SOE Sequence of Events
Software (Application
Software)
Software specific to the user application.
Generally,
it contains logic sequences,
permissives, limits, expressions, etc. that
control
the appropriate input, output,
calculations and decisions necessary to meet
system safety functional requirements.
ST Structured Text. A high level IEC1131
structured language with a syntax similar to
Pascal. Used mainly to implement complex
procedures that cannot be expressed easily
with graphical languages.
Swingframe An empty hinged metal surround, designed to
contain 483mm (19 inch) standard equipment.
Synchronous A data-communication term describing the
method by which signals between computers
are timed. In synchronous communications, a
pre-arranged number of bits is expected to be
sent across a line per second. To synchronise
the sending and receiving machines, a clocking
signal is sent on the same line by the
transmitting computer. There are no start or
stop bits in synchronous communications.
System Engineering
Toolset
Sophisticated software package which can be
used to reduce the time to perform applications
engineering, manufacturing, validation and
support of the TMR system
TMR Triple Modular Redundancy.
TMR Interface An interface between the TMR Controller and 6U
format TMR I/O Modules (Low Density I/O)
8000 Series Certified family of products for use in a wide
range of controls applications including safety,
continuous process, supervisory control/data
acquisition, and integrated control and safety.