Yaskawa SmartTrac CPU Card - Manual (Page 33)

SMART TRAC CPU Card
Technical Manual Glossary of Terms
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Glossary of Terms
One of three Program Control Unit types. A programming language element,
typically represented by a graphical block, consisting of inputs, outputs, internal
variables, and a set of operations. Function blocks are instantiated and can
contain state information from one invocation of an instantiation to the next.
Part 3 of the international standard on Programmable Controllers, which
specifies Programming Languages, including Relay Ladder Logic (RLL),
Structured Text (ST), Sequential Function Charts (SFC), Function Blocks (FB),
and Instruction Lists (IL).
The IEC 61131-3 Instruction List language for programmable controllers.
Alternatively, a program control unit developed using the Instruction List
language.
An embedded PC bus standard. The standard defines the mechanical size of a
self-stacking bus. Also an IEEE draft standard, called the P996.1 Standard for
Compact Embedded PC Modules, PC/104 Specification, Version 2.1, July 1994,
PC/104 Consortium.
An implementation of the IEC 61131-3 Ladder Diagram language.
The IEC-61131-3 defined Sequential Function Chart language used for
programmable controllers or a program control unit developed using Sequential
Function Chart language.
The Structured Text language specified by IEC 61131-3 used in programmable
controllers. It provides a structured programming environment similar to that in
the computer programming language PASCAL.
Function Block
IEC-61131-3
languages
Instruction List
PC/104 Specification
Relay Ladder Logic
Sequential Function
Charts
Structured Text