Memory Tables; Character-String Memory Table - Omron NT20S-ST121B-EV3 User Manual

Memory Tables

4-4

Memory Tables

4-4-1

Character-String Memory Table

Displaying a Character String
Characters and Figures Which Can Be Displayed
144
The NT20 has the "character-string memory table" for the character data and
the "numeral memory table" for numeric data which can be written and
updated by the PLC/Host.
The contents of the memory table entries can be set by using the Support
Tool when displaying the memory table entries on the screen or by editing the
table.
The character-string memory table is an NT20 internal memory used to store
the character data. Up to 128 character-string memory table entries can be
used, and up to 16 full size characters (32 bytes) can be stored in one mem-
ory table entry. The character-string memory table entries at up to 32 posi-
tions can be registered in one screen.
The character-string memory table entries are registered with table entry
numbers 0 to 127.
When creating the screen data by using the Support Tool, set the position on
the screen to display a character string and also set a character string number
to be displayed.
When the NT20 is operated, the screen displays the contents of the charac-
ter-string memory table.
When using a direct connection, it is possible to display the contents of char-
acter-string memory table entries by specifying their numbers with numeral
memory table entries (indirect specification), rather than directly changing the
character-string memory table contents.
For details on how to change currently displayed character strings, refer to 5-
2-2 Changing Displayed Numerals or Character Strings (Changing the Con-
tents of Allocated Words ... Direct Specification) on page 182, and Write
Character-string Memory Table on page 218.
When using the NT20-ST128 (RS-232C), character strings can be also dis-
played according to commands from the host, independently of the currently
displayed screen (terminals Function). Refer to Specify Displayed Characters
on page 232.
The power of expression of the screen can be increased by giving various
attributes such as the enlarged or reverse display to the characters of the
character-string memory table.
The character attributes can be set in the edit screen when creating the
screen data by using the Support Tool.
The following types of characters can be displayed on the NT20:
Character Dots
Type (vertical x
horizontal)
Half size 8 x 8
characters
Character Set
Characters Displayed in One
Screen (without overwriting)
Alphanumerics and 32 characters x 16 lines
symbols (512 characters)
Section 4-4
Maximum Number of