I - s instruction: the instruction converts the integer
word to a ASCII string of 8 characters in length.Format
(FMT) specifies the number of digits to the right of the
decimal point.The result string is written in 9
consecutive bytes from the OUT.
Illegal format （ nnn > 5 ） ASCII constant string data type format ：
String is a series of characters, each character is stored as a byte.The first byte of a
string defines the length of the string, that is the number of characters.If a constant
string is entered directly into the program editor or data block, the string must start
and end with double quotation marks ("string constant").
The following memory map shows the format of the string data type.The length of a
string can be between 0 and 254 characters.The maximum length of the string is 255
bytes.
String
Character
Character
Character
Character
Character
Character
length
..................................
1
2
5
254
3
4
Byte 0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 254
The following is the definition of Operation number of ITS format:
MSB
LSB
7
6
5
4
3
2
1
0
0
0
0
0
c
n
n
n
C = comma (1) or decimal point (0)
nnn = The number of digits on the right side of the decimal point
The length of the output string is always 8 characters.nnn valid values
are from 0 to 5. If nnn=0, the value will be displayed without a decimal
point.When the value of NNN is greater than 5, the output is displayed
as a string of 8 ASCII space characters . C decides to use a comma or a
decimal point between integer and decimal .The 4 bits above the top of
the format must be zero.
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