Character String Data - Mitsubishi Electric M800VW Series Programming Manual

M800V/M80V Series PLC Programming Manual (1/2)
6 Explanation of Instructions and Functions
6.3 Data Designation Method

6.3.5 Character String Data

Character string data is character data used by basic instructions and application instructions.
The target ranges from the designated character to the NULL code (00H) that indicates the end of the character string.
In a character string process, one character corresponds to one byte and the maximum number of characters is 255.
When NULL is not included in the first 256 characters, an NC alarm occurs and a PLC stops during the character string
process.
 When designated character is the NULL code
One word is used to store the NULL code.
M0
 When the number of characters is even
(Number of characters/2 + 1) words are used to store character string and the NULL code.
For example, if "ABCD" is transferred to and after D0, the character string (ABCD) will be stored in D0 and D1, and the NULL
code will be stored in D2. (The NULL code will be stored into the last one word.)
M0
$MOV "ABCD" D0
 When number of characters is odd
(Number of characters/2) words (rounds up decimal fractions) are used to store the character string and the NULL code.
For example, if "ABCDE" is transferred to and after D0, the character string (ABCDE) and the NULL code will be stored in D0
to D2. (The NULL code will be stored into the upper 8 bits of the last one word.)
M0
$MOV "ABCDE" D0
$MOV " " D0
D0
Designation of NULL code (00H)
Character string data transfer instruction
42H 41H
D0
D1
44H 43H
D2 NULL
Designation of a character string composed of even numbers
Character string data transfer instruction
42H 41H
D0
D1 44H 43H
D2 NULL
45H
Designation of a character string composed of odd numbers
Character string data transfer instruction
NULL
107 IB-1501667-B