3G5A2-RPT01-PE datasheet(165/182 Pages) OMRON

165 / 182 page

Glossary

153

constant

An input for an operand in which the actual numeric value is specified. Constants

can be input for certain operands in place of memory area addresses. Some op-

erands must be input as constants.

control bit

A bit in a memory area that is set either through the program or via a Program-

ming Device to achieve a specific purpose, e.g., a Restart Bit is turned ON and

OFF to restart a Unit.

control signal

A signal sent from the PC to effect the operation of the controlled system.

Control System

All of the hardware and software components used to control other devices. A

Control System includes the PC System, the PC programs, and all I/O devices

that are used to control or obtain feedback from the controlled system.

controlled system

The devices that are being controlled by a PC System.

Converting Link Adapter

A Link Adapter used to convert between different types of optical fiber cable, dif-

ferent types of wire cable, or between optical fiber cable and wire cable. Such

conversion is necessary to connect Units that use different forms of communica-

tion.

CPU

See

central processing unit.

CPU Backplane

A Backplane used to create a CPU Rack.

CPU Bus Unit

A special Unit used with CV-series PCs that mounts to the CPU bus. This con-

nection to the CPU bus enables special data links, data transfers, and process-

ing.

CPU Rack

The main Rack in a building-block PC, the CPU Rack contains the CPU, a Power

Supply, and other Units. The CPU Rack, along with the Expansion CPU Rack,

provides both an I/O bus and a CPU bus.

crystal optical fiber cable

See

AGF.

C-series PC

Any of the following PCs: C2000H, C1000H, C500, C200H, C40H, C28H, C20H,

C60K, C60P, C40K, C40P, C28K, C28P, C20K, C20P, C120, or C20.

CV Support Software

A programming package run on an IBM PC/AT or compatible to serve as a Pro-

gramming Device for CV-series PCs.

CV-series PC

Any of the following PCs: CV500, CV1000, CV2000, or CVM1

CVSS

See

CV Support Software.

cycle

One unit of processing performed by the CPU, including SFC/ladder program

execution, peripheral servicing, I/O refreshing, etc. The cycle is called the scan

with C-series PCs.

cycle time

The time required to complete one cycle of CPU processing.

data area

An area in the PC’s memory that is designed to hold a specific type of data.

data link

An automatic data transmission operation that allows PCs or Units within PC to

pass data back and forth via common data areas.

data register

A storage location in memory used to hold data. In CV-series PCs, data registers

are used with or without index registers to hold data used in indirect addressing.

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