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Memory Tables and Bar Graphs
Section 5-2
Displaying and Referencing Numeral Memory Table Contents
Since the numeral memory tables can be allocated to the words in the PC, the PC
can write data to the numeral memory tables or the initial values can be set when
creating the screen data.
Also, by relating the numeral memory tables with the bar graphs, the bar graphs
corresponding to the data of the numeral memory tables can be displayed.
During the operation, the display contents are automatically updated so that the
contents of the numeral memory table being displayed are the same as that of the
PC word.
There are two methods for referencing numeral memory tables used for numeral
displays, as follows:
- Direct specification
- Indirect specification (with Ver.5 direct connection only)
Reference: The only method available for numeral memory tables used for graphs and numer-
al settings is direct specification.
S
Direct specification
Direct specification is a method of specification in which the contents of displayed
memory tables are directly correlated with the contents of the allocated words.
NT20S
PC
0 0 6 2
Character string
memory table 18
0 0 6 2
0
6
0
2
Allocated channel
(character string memory table 18)
Direct
specification
DM0100
S
Indirect specification (with Ver.5 direct connection only)
NT20S
PC
7 7 7 7
Numeral
memory table 18
0 0 6 2
7 7 7 7
0
6
0
2
Character
string memory table 62
7
7
7
7
DM0200
Allocated word
(numeral memory table 18)
DM0100
Allocated word (character string table 62)
Indirect
specification
In indirect specification, the contents (numerical value) of the specified numeral
memory table are regarded as a 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.
Summary of Contents for NT20S
Page 1: ...Cat No V020 E1 04 NT20S Programmable Terminal OPERATION MANUAL ...
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Page 4: ...iii NT series Programmable Terminal Operation Manual Revised August 1997 ...
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