Omron NT631 Series Reference Manual page 79

Memory Tables
Display Functions
Input Functions
Output Functions
Processing Functions
Relationship with Other Elements
70
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Reference: When the PT starts operation, the contents of numeral memory tables is as fol-
lows depending on whether or not the numeral memory table is allocated to the
host, on the Initial setting for the numeral memory table, and on whether or not
the resume function is used.
Allocated Allocated
to Host?
Checked Checked
Yes
Not checked
No (Ineffective)
Numeral memory tables themselves have no display function.
To display the contents of numeral memory tables, use 2-8 Numeral Display
(page 130) or 2-10 Graphs (page 144). Specify numeral memory tables when
displaying numeral displays as guide characters of lamps or touch switches as
well.
When a numeral memory table is allocated to a word or words at the host, the
contents of the word are read and stored.
However, reading is only executed for those numeral memory tables that are be-
ing used for the currently displayed screen (when copying a memory table, the
contents of the allocated word(s) of the copy source memory table are read) or
specified as operands in the mathematical function.
When a numeral memory table is allocated to a word or words at the host, the
contents of the numeral memory table are written to the word(s).
However, writing is only executed in the following cases.
• When the contents of the numeral memory table have changed as a result of
operations at the PT, such as memory table copying by touch switch operation,
or use of the numeral setting function
• When the Initial setting at the Support Tool is checked when the power to the
PT is turned ON, the PT is reset, or on transition from the System Menu to the
RUN mode (the contents of all numeral memory tables that are allocated to the
host and whose Initial setting is checked are written)
• When using numeral memory tables allocated in the host as destinations for
the calculation results of the mathematical function
The contents of word(s) allocated in the host are interpreted and stored in accor-
dance with the attributes that have been set (refer to Common Attributes on
page 64). Data is converted according to the preset attributes even when the
contents of numeral memory tables changed with PT operations are being writ-
ten to words in the host.
• When numeral display is used, the contents of numeral memory tables can be
displayed in real time as numeric values (page 130).
• When a bar graph is used, the contents of a numeral memory table can be dis-
played in real time in bar graph form (page 144).
Initial Set- Initial Set-
ting
Used
Existing numeral memory
table value retained (at
host word(s) also)
When the numeral memory table is initialized by System
Menu operation: initial value of the numeral memory
table (at host word(s) also)
Contents of host word(s)
Existing numeral memory
table value
When the numeral memory table is initialized by System
Menu operation: initial value of the numeral memory
table
Section
Resume Function
Not Used
Initial value of numeral
memory table used (at
host word(s) also)
Initial value of numeral
memory table
2-3