Memory Tables - Omron NT620S Operation Manual

Memory Tables

4-4 Memory Tables
4-4-1 Character-String Memory Table
Number of Character-string Memory Tables
Displaying a Character-string
OMRON
The NT620S/620C has the "character-string memory table" for the character
data, the "numeral memory table" for numeric data and the "bit memory table" for
bit data, which can be written and updated by the PC.
The contents of the memory tables can be set by using the support tool when
displaying the memory tables on the screen or by editing the table.
The character-string memory table is an NT620S/620C internal memory used to
store the character data. Up to 1000 character-string memory tables can be
used, and up to 20 full size characters (40 bytes) can be stored in one memory
table. The character-string memory tables at up to 50 positions can be registered
in one screen.
Set the number of character-string memory tables in the support tool's "system
memory".
256 : Sets the number of character-string memory tables to 256
1000 : Sets the number of character-string memory tables to 1000.
The difference between setting 1000 character-string memory tables and 256
character-string memory tables in terms of the memory capacity required for
screens is 29760 bytes.
The character-string memory tables are registered with table numbers 0 to 999.
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 NT620S/620C is operated, the screen displays the contents of the
character-string memory table.
For the actual method used to modify a currently displayed character-string, see
"Changing Displayed Numerals or Character-Strings (Changing the Contents of
Allocated Words)" (page 205).
Character-string memory tables are divided into two types depending on their
numbers. Numbers 0 to 255 can be written to and read from without restriction,
while numbers 256 to 999 are read-only character-string memory tables.
The difference in the way memory tables are used depending on which of these
number groups they fall into is explained below.
• Memory Table from 0 to 255
During PT operation, the character-string data in the Character-String Memory
Table written from the PC is displayed in the screen. An initial value can also be
set when screen data is created.
Character-string displaying area that is
assigned to the Character-String Memory Table No.
2
Character-String Memory Table
FA
OMRON
PT
NT620C
Capable of being overwritten
by the Host
NO. 1
NO. 2
NO. 3
NO. 4
Section 4-4
Host
133