Memory Tables And Bar Graphs - Omron NT20S Operation Manual

Memory Tables and Bar Graphs

5-2

Memory Tables and Bar Graphs

Displaying and Referencing Character String Memory Table Contents
Since the character-string memory tables can be allocated to the words in the PC,
the PC can write data to the character-string memory tables or the initial values
can be set when creating the screen data.
Automatic updating is performed to ensure that the currently displayed NT20S
character string memory table contents and PC word contents always match each
other.
There are two methods for referencing character string memory tables used for
character string display, as follows:
- Direct specification
- Indirect specification (with Ver.5 direct connection only)
S Direct specification
Direct specification is a method of specification in which the contents of dis-
played memory tables are directly correlated with the contents of the allocated
words.
NT20S
a b c d
S Indirect specification (with Ver.5 direct connection only)
In indirect specification, even if the displayed data is a character string, the dis-
play is correlated with a numeral memory table. The contents (numerical value)
of this numeral memory table are regarded as a character string memory table
number and the contents of the table with this number are displayed.
Up to 50 numeral displays and 50 character string displays can be specified on
one screen by using indirect specification.
NT20S
a b c d
Direct Character string
specification memory table 51
a b c d
Indirect Numeral
specification memory table 20
0 0 5 1
Character
string memory table 51
a b c d
Section 5-2
PC
Allocated channel
(character string memory table 51)
DM0100
6 1 6 2
6 3 6 4
PC
Allocated word (numeral memory table 20)
DM0000
0 0 5 1
Allocated word (character string table 51)
DM0100
6 1 6 2
6 3 6 4
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