Xinje XD Series - Page 290

289
XDM program:
Sometimes the data of user communication is stored in multiple registers in the form of
ASCII code. Users need to take this value out, store it in a register and display it on the HMI.
Customers often consider using HEX (ASCII to hexadecimal) instructions to achieve it. But
HEX instructions are difficult to use and understand. Often, we will not use this instruction to
complete it. The relationship between values can be found by ASCII code comparison table.
ASCII code table:
ASCII
value
Control
character
ASCII
value
Control
character
ASCII
value
Control
character
ASCII
value
Control
character
0
NUT
32
(space)
64
@
96
`
1
SOH
33
!
65
A
97
a
2
STX
34
”
66
B
98
b
3
ETX
35
#
67
C
99
c
4
EOT
36
$
68
D
100
d
5
ENQ
37
%
69
E
101
e
6
ACK
38
&
70
F
102
f
7
BEL
39
’
71
G
103
g
8
BS
40
(
72
H
104
h
9
HT
41
)
73
I
105
i
10
LF
42
*
74
J
106
j
11
VT
43
+
75
K
107
k
12
FF
44
，
76
L
108
l
13
CR
45
-
77
M
109
m
14
SO
46
。
78
N
110
n
15
SI
47
/
79
O
111
o
16
DLE
48
0
80
P
112
p
17
DC1
49
1
81
Q
113
q
18
DC2
50
2
82
R
114
r
19
DC3
51
3
83
S
115
s
20
DC4
52
4
84
T
116
t
21
NAK
53
5
85
U
117
u
22
SYN
54
6
86
V
118
v
23
TB
55
7
87
W
119
w
24
CAN
56
8
88
X
120
x
25
EM
57
9
89
Y
121
y
26
SUB
58
：
90
Z
122
z
27
ESC
59
；
91
[
123
{
28
FS
60
<
92
\
124
|
29
GS
61
=
93
]
125
}
30
RS
62
>
94
^
126
~
31
US
63
?
95
—
127
DEL
Example 3: A pressure controller communicates with PLC in free communication mode to
realize data acquisition. The value displayed on the pressure controller is -0.7814 MPa. The
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