Omron NT21 User Manual

2-9SectionCharacter String Display
148
2-9 Character String Display
The contents of character string memory table entries are displayed as charac-
ter strings.
Alphanumerics and symbols can be displayed. It is also possible to display
marks (character codes FF20 to FFFF
H) in character strings.
There are two methods for referencing a character string memory table entry
whose contents are to be displayed, as follows:
• Direct reference (reference of the number of the relevant character string
memory table entry)
Allocated word
(character string memory table entry 51)
PC
DM0100
a b c d
PT
a b c d
6162
6364
Direct
reference
Character string
memory table
entry 51
• Indirect reference (reference of the numeral memory table entry that stores the
number of the relevant character string memory table entry)
Allocated word
(character string memory
table entry 51)
PC
DM0000
a b c d
PT
0 0 5 1
0051
a b c d
6162
6364
DM0100
Indirect
reference
Numeral memory
table entry 20
Allocated word
(numeral memory table entry 20)
Character string
memory table entry 51
Reference: When the PT is in NT20S or NT30/620 compatible mode, image and library
codes can be included in character string memory table entries. An image or li-
brary display might extend beyond the edge of the PT’s screen when it is dis-
played by changing the contents of a character string memory table entry within a
character string display. Refer to Appendix C for details on the NT20S and
NT30/620 compatible modes (page 451).
Restrictions
• A maximum of 256 character string displays can be registered for one screen.
(Same for window screen.) For an overlapping screen comprising 8 child
screens, the maximum is 1,024.
There is no restriction on the number of character string displays that can be
registered for one screen data file: any number can be registered as long as
the data file capacity is not exceeded. However, if a large number of elements
are registered, check that the restrictions on element display are complied with
by referring to Display Restrictions (page 431).
• The maximum number of character string display that can be displayed using
indirect reference is 100 per screen combined with the number of numeral dis-
play that is displayed using indirect reference.
(Same restriction applies to overlapping screens or when displaying window
screens.)
• The following numbers of characters can be displayed in one character string
display, depending on the scale.
Function Outline

Omron NT21 Specifications

General

Brand	Omron
Model	NT21
Category	Touch terminals
Language	English