3G5A2-RPT01-PE datasheet(171/182 Pages) OMRON

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Glossary

159

nonfatal error

A hardware or software error that produces a warning but does not stop the PC

from operating.

NOT

A logic operation which inverts the status of the operand. For example, AND

NOT indicates an AND operation with the opposite of the actual status of the op-

erand bit.

octal

A number system where all numbers are expressed in base 8, i.e., numbers are

written using only numerals 0 through 7.

OFF

The status of an input or output when a signal is said not to be present. The OFF

state is generally represented by a low voltage or by non-conductivity, but can be

defined as the opposite of either.

OFF delay

The delay between the time when a signal is switched OFF (e.g., by an input

device or PC) and the time when the signal reaches a state readable as an OFF

signal (i.e., as no signal) by a receiving party (e.g., output device or PC).

offset

A positive or negative value added to a base value such as an address to specify

a desired value.

The status of an input or output when a signal is said to be present. The ON state

is generally represented by a high voltage or by conductivity, but can be defined

as the opposite of either.

ON delay

The delay between the time when an ON signal is initiated (e.g., by an input de-

vice or PC) and the time when the signal reaches a state readable as an ON sig-

nal by a receiving party (e.g., output device or PC).

on-line removal

Removing a Rack-mounted Unit for replacement or maintenance during PC op-

eration.

operand

The values designated as the data to be used for an instruction. An operand can

be input as a constant expressing the actual numeric value to be used or as an

address to express the location in memory of the data to be used.

operating error

An error that occurs during actual PC operation as opposed to an initialization

error, which occurs before actual operations can begin.

optical connector

A connector designed to be connected to an optical fiber cable.

optical fiber cable

Cable made from light conducting filaments used to transmit signals.

A logic operation whereby the result is true if either of two premises is true, or if

both are true. In ladder-diagram programming the premises are usually ON/OFF

states of bits or the logical combination of such states called execution condi-

tions.

output

The signal sent from the PC to an external device. The term output is often used

abstractly or collectively to refer to outgoing signals.

Output Block

A Unit used in combination with a Remote Interface to create an I/O Terminal. An

Output Block provides mounting positions for replaceable relays. Each relay can

be selected according to specific output requirements.

output device

An external device that receives signals from the PC System.

output point

The point at which an output leaves the PC System. Output points correspond

physically to terminals or connector pins.

3G5A2-RPT01-PE Datasheet(PDF) 171 Page - Omron Electronics LLC

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