Omron CP - PROGRAMMING MANUAL 05-2007 Programming Manual page 45

Programming Concepts
Data Operand
Text string
Text string data is stored in ASCII
(one byte except for special charac-
ters) in order from the leftmost to the
rightmost byte and from the right-
most (smallest) to the leftmost word.
00 hex (NUL code) is stored in the
rightmost byte of the last word if
there is an odd number of charac-
ters.
0000 hex (2 NUL codes) is stored in
the leftmost and rightmost vacant
bytes of the last word + 1 if there is
an even number of characters.
ASCII characters that can be used in a text string includes alphanumeric characters, Katakana and sym-
bols (except for special characters). The characters are shown in the following table.
ASCII Characters
Bits 0 to 3
Binary 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111
Hex 0 1
0000 0
0001 1
0010 2
0011 3
0100 4
0101 5
0110 6
0111 7
1000 8
1001 9
1010 A
1011 B
1100 C
1101 D
1110 E
1111 F
12
Data form
Description
---
2 3 4 5
0 @ P
Space
! 1 A Q
2 B R
"
# 3 C S
$ 4 D T
% 5 E U
& 6 F V
' 7 G W
( 8 H X
) 9 I Y
* : J Z
+ ; K [
, < L \
- = M ]
. > N ^
/ ? O _
Symbol Range
Symbol Examples
'ABCDE'
'A' 'B'
'C' 'D'
'E' NUL
41 42
43 44
45 00
'ABCD'
'A' 'B'
'C' 'D'
NUL NUL
41 42
43 44
00 00
Bits 4 to 7
6 7 8 9
` p
a q
b r
c s
d t
e u
f v
g w
h x
i y
j z
k {
l |
m }
n
~
o
Section 1-1
Application example
MOV$(664)
D100
D200
D100 41
D101 43
D102 45
D200 41
D201 43
D202 45
A B C D
0 @ P
! 1 A Q
" 2 B R
# 3 C S
$ 4 D T
% 5 E U
& 6 F V
' 7 G W
( 8 H X
) 9 I Y
* : J Z
+ ; K [
, < L \
- = M ]
. > N ^
/ ? O _
42
44
00
42
44
00
E F