Omron NT21 User Manual

2-3SectionMemory Tables
72
2-3 Memory Tables
The PT has the following three types of memory area that can be written to freely
from the host.
• Numeral memory table for numeric value data Page 72
• Character string memory table for text data Page 79
• Bit memory table for bit data Page 83
The contents of numeral/character string memory table entries can be displayed
for individual memory table entries at the Support Tool, and set in table editing.
Reference: In addition to the memory tables listed above, there is a mathematical table in
which a calculation formulas can be registered. For details, refer to 2-18 Mathe-
matical Function (page 278).
2-3-1 Numeral Memory Table
Numeral memory table is contained in internal memory of the PT for recording
numeric value data.
Since words can be allocated in the host for numeral table entries, the contents
of host words can be displayed as numeric values at the PT via the numeral
memory table.
Numeral memory table entries are assigned numeral memory table entry num-
bers so that they can be managed and designated individually.
1234
9999
Display
Display
Numeral memory table entry 1
Numeral memory table entry 5
Allocated word
PC
PT
Restrictions
• The number of numeral memory table entries can be set as one of the following
in the System settings in the PT configuration settings made at the Support
Tool.
• 512 (numeral memory table entry numbers 0 to 511)
• 1000 (numeral memory table entry numbers 0 to 999)
• 2000 (numeral memory table entry numbers 0 to 1999)
Since the numeral memory table shares memory with the screen data, setting a
large number of numeral memory table entries reduces the memory area avail-
able for screen data.
 The data quantity of one numeral memory table entry can be set to either of the
following by setting at the Support Tool.
1 word (2 bytes)/2 words (4 bytes)
• Since numeral memory table entry numbers 1000 and higher are not backed
up by the battery, they return to the initial values set with the Support Tool when
the power to the PT is turned ON, when the PT is reset, and on transition from
the System Menu to the RUN mode, regardless of the setting made for the re-
sume function.
• Numeral memory table entry numbers 247 to 255 are used with the clock func-
tion of the PT. These table entries cannot be used for other applications. For
details on the clock function, refer to 2-16-6 Clock Function (page 251).
Function Outline

Omron NT21 Specifications

General

Brand	Omron
Model	NT21
Category	Touch terminals
Language	English