Omron CJ2 User Manual download pdf (Page 9)

9

The Ease of Changing Designs Makes It

Simple to Add or Upgrade Equipment.

There is little effect on address changes.

Previously, when data was exchanged by

address speciﬁ cation and addresses were

changed, the program had to be changed at

other Controllers and various operations, such as

memory checks, had to be performed. Now, tag

names eliminate the dependence on a memory

map and the need for checking items affected

by changes. This allows equipment to be easily

added or upgraded.

CJ2 CPU

Programmable Terminal

NS Series

EtherNet/IP

Host application

No change required.

Even after the change, the

number of items produced

is acquired correctly from

H200.

With the CX-Programmer, the ad-

dress for the tag named “Number

produced” is changed from D100

to H200.

Change

D100

H200

tag name address

Change

No change required.

Number_produced

Number_produced

Number_produced

Number_produced

Assurance of Quality, Free from Mistakes.

Tags can be shared among the CJ2 CPU Units,

NS-series PTs and Middleware. Tag names can

be shared among controllers that exchange

data using the CX-One or Excel import/export

functions. Because redundant address entry and

address allocation are not needed, checking is

also not required. This makes it easy to construct

high-quality systems.

What is Tag Access?

A tag is a name given to an address. Tags are

managed in the CJ2 CPU Unit, where they are

deﬁ ned as network symbols. The common user-

deﬁ ned tag names are used from Programmable

Terminals and host applications to access memory

in a CJ2 CPU Unit without knowing the actual

memory address.

NEW

CX-Programmer symbol tables can

be copied and pasted!

Copy

&

Paste

CX-Designer symbol table

CX-Programmer symbol table

Tag name

Number_produced

Production_target

Physical address

D100

D200

Tags are managed in the CJ2 CPU Unit as network symbols.

Data

&200

&500

Address

D100

D200

Symbol Table

I/O Memory

EtherNet/IP

CJ2 CPU

CJ2 CPU CJ2 CPU

Accessed by tag nameAccessed by tag name

Accessed by tag name

Number_produced

Programmable Terminal

NS Series

Host application

Number_produced

Programmable Terminal screen

Created using tag names.

Application

Developed using tag names.

PAC ladder program

Developed using tag names.

Number_produced

Data links using tag names

Data link design

Allocated using tag names.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 39 40

Comments to this Manuals

No comments