Omron NT31 Operation Manuals page 304

Memory Tables
Reference: When the NT31/NT31C starts operation, the contents of character string memory
Since the special auxiliary relays of the CVM1/CV series PCs are all allocated to
system functions, they cannot be used for purposes other than system use.
The range of each memory area differs according to the PC type. Refer to AP-
PENDIX L "PC Memory Map", page 684.
The relationships among the allocated words, the number of allocated words,
and the contents of character string memory tables are indicated in the figure
below.
Example: Number of allocated words = 4 words
"A" = 41
"C" = 43
"Y" = FF01
"E" = 45
S "Initial" setting and initial value
The "Initial" setting determines whether the contents of character string memory
tables are written to the allocated word(s) at the host when the power to the
NT31/NT31C is turned ON, when the NT31/NT31C is reset, or on transition from
the System Menu to the RUN mode.
Here, "Initial" (initialization) means the initialization of the contents of host
word(s) as they are overwritten by the contents of the character string memory
table. If the character string memory table is not allocated to a host word or
words, this setting has no effect.
tables are as follows depending on whether or not the character string memory
table is allocated to the host, on the "Initial" setting for the character string memory
table, and on whether or not the resume function is used.
Allocated Allocated
"Initial" Setting
to Host?
Checked
Yes
Not checked
No (Ineffective)
, "B" = 42 First word
H H
, "D" = 44 First word + 1
H H
First word + 2
H
, "F" = 46 First word + 3
H H
Used
Existing character string
memory table value re-
tained (at host word(s) also)
When the character string memory table is initialized by
System Menu operation: initial value of the character
string memory table (at host word(s) also)
Contents of host word(s)
Existing character string
memory table value
When the character string memory table is initialized by
System Menu operation: initial value of the character
string memory table
Section 7-3
4 1 4 2
4 3 4 4
"ABCDYEF"
F F 0 1
4 5 4 6
Resume Function
Not Used
Initial value of character
string memory table used
(at host word(s) also)
Initial value of character
string memory table
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