Omron NT21 User Manual

2-3SectionMemory Tables
78
Reference: When the PT starts operation, the contents of numeral memory table entries is as
follows depending on whether or not a word is allocated for the numeral memory
table entry in the host, on the Initial setting for the numeral memory table entry,
and on whether or not the resume function is used:
Word al-
Initial set
Resume function
Word
al
located
in host?
Initial set-
ting
Used (Battery must be
present.)
Not used
Checked
Existing numeral memory
table value retained (at
host word(s) also)
Initial value of numeral
memory table entry used
(at host word(s) also)
Yes
Checked
When the numeral memory table is initialized by System
Menu operation: initial value of the numeral memory
table entry (at host word(s) also)
Not checked Contents of host word(s)
Existing numeral memory
table value
Initial value of numeral
memory table entry
No (Ineffective)
When the numeral memory table is initialized by System
Menu operation: initial value of the numeral memory
table entry
Numeral memory table entries themselves have no display function.
To display the contents of numeral memory table entries, use 2-8 Numeral Dis-
play (page 140) or 2-10 Graphs (page 154). Specify numeral memory table en-
tries when displaying numeral displays as guide characters of lamps or touch
switches as well.
When one or two words are allocated in the host for numeral memory table en-
tries, the contents of the words is read and stored.
However, reading is only executed for those numeral memory table entries that
are being used for the currently displayed screen (when copying a memory table
entry, the contents of the allocated word(s) of the copy source memory table
entry is read) or specified as operands in the mathematical function.
When one or two words are allocated in the host for a numeral memory table
entry, the contents of the numeral memory table is written to the word(s).
However, writing is only executed in the following cases.
• When the contents of the numeral memory table entry has changed as a result
of operations at the PT, such as memory table entry 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 table entries that are allocated
words in the host and whose initial setting is checked are written)
• When using words allocated for the numeral memory table entry 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 73). Data is converted according to the preset attributes even when the
contents of numeral memory table entries changed with PT operations are being
written to words in the host.
Relationship with Other Elements
• When numeral display is used, the contents of numeral memory table entries
can be displayed in real time as numeric values (page 140).
Display Functions
Input Functions
Output Functions
Processing Functions

Omron NT21 Specifications

General

Brand	Omron
Model	NT21
Category	Touch terminals
Language	English