3G5A2-RPT01-PE datasheet(170/182 Pages) OMRON

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Glossary

158

Jumps in ladder diagrams are usually conditional on an execution condition;

jumps in SFC programs are conditional on the step status and transition condi-

tion status before the jump.

least-significant (bit/word)

See

rightmost (bit/word).

LED

Acronym for light-emitting diode; a device used as for indicators or displays.

leftmost (bit/word)

The highest numbered bits of a group of bits, generally of an entire word, or the

highest numbered words of a group of words. These bits/words are often called

most-significant bits/words.

link

A hardware or software connection formed between two Units. “Link” can refer

either to a part of the physical connection between two Units or a software con-

nection created to data existing at another location (i.e., data links).

Link Adapter

A Unit used to connect communications lines, either to branch the lines or to con-

vert between different types of cable. There are two types of Link Adapter:

Branching Link Adapters and Converting Link Adapters.

Link System

A system used to connect remote I/O or to connect multiple PCs in a network.

Link Systems include the following: SYSMAC BUS Remote I/O Systems, SYS-

MAC BUS/2 Remote I/O Systems, SYSMAC LINK Systems, Host Link Systems,

and SYSMAC NET Link Systems.

Link Unit

Any of the Units used to connect a PC to a Link System. These include Remote

I/O Units, SYSMAC LINK Units, and SYSMAC NET Link Units.

linkable slot

A slot on either a Backplane to which a Link Unit can be mounted. Backplanes

differ in the slots to which Link Units can be mounted.

load

The processes of copying data either from an external device or from a storage

area to an active portion of the system such as a display buffer. Also, an output

device connected to the PC is called a load.

main line

In a Link System connected through Branching Link Adapters, the communica-

tions cable that runs from the Unit at each end of the System through the Link

Adapters.

MCR Unit

Magnetic Card Reader Unit.

megabyte

A unit of storage equal to one million bytes.

memory area

Any of the areas in the PC used to hold data or programs.

most-significant (bit/word)

See

leftmost (bit/word).

nesting

Programming one loop within another loop, programming a call to a subroutine

within another subroutine, or programming an IF–ELSE programming section

within another IF–ELSE section.

Network Service Board

A device with an interface to connect devices other than PCs to a SYSMAC NET

Link System.

Network Service Unit

A Unit that provides two interfaces to connect peripheral devices to a SYSMAC

NET Link System.

noise interference

Disturbances in signals caused by electrical noise.

3G5A2-RPT01-PE Datasheet(PDF) 170 Page - Omron Electronics LLC

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