Omron NT21 Reference Manual page 334

Changing Numeral and Character String Display
Reference:
Setting
Reference: The range of character string memory table entry numbers that can actually be
Operation
Example of Use
S If the control code 00
H
The character string is displayed only up to this code since it is regarded as the
end of the characters. When writing character codes to a word, do not write
00 in a character string.
H
S When the PT is set to NT20S or NT30/NT620 compatible mode, image and li-
brary codes can be included in character string memory table entries. Be sure
to check the size of the image or library display so that it doesn't extend past the
edges of the screen when it is displayed. (Refer to page 451.)
S When the PT reads out the words in a character string memory table entry, it
reads the number of words specified in the Words setting. Character strings
are not read out beyond this range.
When creating a screen using the Support Tool, set the allocated words for the
character string memory table entry. The Words setting must be set carefully.
used depends on the number of character string memory table entries set in the
PT Configuration – System settings at the Support Tool.
Change the contents of the word in the host allocated for the character string
memory table entry.
The contents of the word are reflected to the character string memory table entry
according to the setting of the character string memory table entry.
Note that the contents of a character string memory table allocated word can be
only be read out when the memory table entry is being used for an element that is
currently displayed by the PT. The contents of an allocated word that is not re-
lated to the display are not read out.
Direct Specification
An example of displaying the contents of a PC word allocated to a character
string memory table entry as they are is shown below. The display on the PT
screen changes as the contents of the PC word change. If the system is so con-
figured that the character string is written to the word using a personal computer
via a Communications Unit, the required message can be displayed on the PT.
Setting at the Support Tool
Set as indicated below using the Support Tool.
Character string memory table entry 150:
D00300 (Words: 6)
Contents to be registered for the screen:
Character string memory table entry 150
SETTING UP
PC Program
When changing the contents of a word using a personal computer, no special
ladder program used for controlling the PT is necessary.
Program Operation
The contents of the word are always displayed as a character string.
is written to a word, it is displayed as a space by the PT.
Character string memory table entry 150
Section 3-5
319