Omron NT21 User Manual

2-3SectionMemory Tables
83
When one or more words are allocated for a character string memory table entry
at the host, the contents of the character string memory table entry are written to
the word(s).
However, writing is only executed in the following cases.
• When the contents of the character string memory table entry have changed
as a result of operations at the PT, such as memory table copying by touch
switch operation, or use of the character string input function
• When the Initial setting of string table entry 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 words allocated for character string memory
table entries in the host and whose initial setting is checked are written.)
Character string memory table entries have no data processing function.
Relationship with Other Elements
• When character string display is used, the contents of character string memory
table entries can be displayed in real time as character strings (page 148).
• When alarm list or alarm history is used, the contents of the character string
memory table entry can be displayed as a message (page 182).
• When a lamp’s guide character is made into a character string display, the con-
tents of a character string memory table entry can be displayed as guide char-
acters in real-time (page 112).
• When a touch switch’s guide character is made into a character string display,
the contents of a numeral memory table entry can be displayed as guide char-
acters in real-time (page 119).
• When character string input is used, character strings can be input into the
character string memory table entry from the screen of the PT (page 210). It is
also possible to input character strings from a bar code reader connected to
the PT.
• When the touch switch copy setting function is used, the contents of a charac-
ter string memory table entry can be copied (page 135).
• By operation of the PT status control area. data can be copied between
memory table entries from the host (page 52).
• If the contents of character string memory table entries are changed by opera-
tion at the PT, the change is notified to the PT status notify area (page 61).
2-3-3 Bit Memory Table
The bit memory table is held in memory for bit data.
Bits are allocated to bit memory table entries in the host, and the status of the bit
is monitored so that a specific function can be executed in accordance with the
status of the bit.
Bit memory table entries are assigned bit memory table entry numbers so that
they can be managed and designated individually.
Bit memory table entries have the following functions.
Screen Changeover Function
When the host bit allocated for a bit memory table entry changes status from 0
(OFF) to 1 (ON), the screen whose screen number is set in the bit memory table
entry is displayed.
No. 1
← 1 (ON)
No. 2
No. 3
0
0
0
Screen number 11
displayed
Screen number 10
Screen number 11
Screen number 12
Bit PC
Output Functions
Processing Functions
Function Outline

Omron NT21 Specifications

General

Brand	Omron
Model	NT21
Category	Touch terminals
Language	English