Toshiba T2N User Manual download pdf (Page 162)

3.User Data

User's manual 149

The area which stores the external input/output data, current values of

timer or counter which are used in user program and the values of the

variables for data processing is called the ‘user data’ area.

For user data, the storage location of the data is expressed by a

combination of ‘function type’ and a sequence of numbers which starts

from 0 (this is called the ‘address’).

Example) XW 005

Address 005 (in this case it is the register address)

Function type XW = Input register

To say that the content of XW005 is 100 is to say that the

numerical value 100 is stored in a location in the user data

memory indicated by XW005.

Also, user data is divided into registers and devices according to the

type of data to be stored. (Although the expression ‘relay’ is also used, a

relay should be regarded as one type of device)

A ‘register’ is area which stores 16 bits of data (provided it is a positive

integer, the register can express any numerical value from 0 to 65535)

and it is expressed as a combination of a function type and a register

address. (the register address is a decimal number)

Example) D 1024

Function type D = Data register

On the other hand a ‘device’ is an area which stores 1 bit of data (it

expresses 1 or 0, in other words ON or OFF), and it is expressed as a

combination of a function type and a device address. However, a device

does not use an independent memory area. It is allocated as 1 bit in the

16 bits of the corresponding register. Therefore, the device address is

expressed in the form of the corresponding register address + bit position.

Example) X 005 6

Bit position (there are 16 positions 0-F)

Function type X = Input device (corresponds to

input register XW

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3.1

Overview

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Toshiba T2N User Manual Page 162