Trident Planning and Installation Guide
Glossary
AI Module Analog Input Module.
alias Five-digit number that the system uses in place of a variable name when
communicating with an external host. The alias is a convention of Modbus, an
industry-standard protocol adopted by Triconex for use with its communication
modules. Each alias contains a Modbus message type and the address of the
variable in the system.
ASIC Application-specific integrated circuit.
availability Probability that the controller is operational at some instant of time.
bin Address range of system aliased variables based on class and type combinations.
For example, all Read Only Input Discrete variables are grouped into Bin 2, and all
Read/Write Memory Integer variables are grouped into Bin 12.
CE Mark Certification by the European Union which ensures the electro-magnetic
compatibility of the system with other pieces of electrical/electronic equipment.
channel Data path from input point to output point. Triple modular redundant (TMR) sys-
tems have three channels.
CSA Canadian Standards Association, a not-for-profit membership organization which
develops standards and tests in areas ranging from nuclear power, health care,
occupational health and safety, housing and construction materials to the electrical,
electronic and telecommunications fields. CSA certification of a product generates
consumer confidence in many countries.
configuration Arrangement of the programmable electronics within a system and the
combination of programmable and non-programmable equipment within the
installation.
control system Governs the operation of plant, machinery or other equipment by producing
appropriate instructions in response to input signals.
coverage Probability that a particular class of fault is successfully detected before a system
failure occurs.
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