291
Memory Tables
Section 7-3
7-3-2
Character String Memory Tables
[Function Outline]
“Character string memory tables” are internal memories of the NT31/NT31C for
recording character string data.
Since they can be allocated to words at the host, the contents of words at the host
can be displayed as character strings at the NT31/NT31C via character string
memory tables.
Character string memory tables are assigned character string memory table num-
bers so that they can be managed and designated individually.
a b c d e
A B C D E
Display
Display
Allocated word
PC
NT31/NT31C
Character string memory table No. 8
Character string memory table No. 12
Read
[Restrictions]
S
The number of character string memory tables can be set as one of the following
at the Support Tool.
- 256 (character string memory table numbers 0 to 255)
- 1000 (character string memory table numbers 0 to 999)
- 2000 (character string memory table numbers 0 to 1999)
Since the character string memory tables share memory area with the screen
data, setting a large number of character string memory tables reduces the
memory area available for screen data.
S
The data quantity of one character string memory table can be set as follows by
setting at the Support Tool (a setting of “0” indicates no allocation).
0 to 40 characters (= 0 to 40 bytes, which is 0 to 20 words)
S
Character string memory table numbers 500 and higher always remain at the
initial value set with the Support Tool. These values cannot be changed later and
can only be read. These tables cannot be allocated to the host either.
S
The characters that can be stored in character string memory tables are alpha-
numerics, symbols, and marks (codes FF20 to FFFF
H
).
Reference
- If “00
H
” (NULL code) is encountered in a character string, the subsequent data
is ignored.
- If codes outside the ranges indicated above are written to the allocated words at
the host, the character strings may not be displayed correctly.
Summary of Contents for NT31 Series
Page 1: ...Cat No V043 E1 2 Programmable Terminal NT31 31C OPERATION MANUAL...
Page 2: ...iii NT31 31C Programmable Terminal Operation Manual Produced March 1999...
Page 41: ...30 Before Operating Section 1 5...
Page 75: ...64 Using a Memory Unit NT31 NT31C without V1 Section 3 6...
Page 160: ...149...
Page 174: ...163...
Page 193: ...182...
Page 211: ...200...
Page 235: ...224 c Return to the screen on which screens are specified...
Page 262: ...251...
Page 360: ...349 It is not possible to control a gloval window by touch switch operation...
Page 468: ...457 254 255 0 2 7 1 4 5 3 3 0 0 0 5 9 8 0 3...
Page 476: ...465 Special Functions Section 7 16...
Page 495: ...484 OFF...
Page 610: ...599 Commands Responses Section 9 3...
Page 630: ...619 Examples of Actual Applications of Memory Link Section 10 2...