Data Handling; Data Types - Mitsubishi Electric MELSEC Q Series Programming Manual

3 HANDLING OF CHARACTERS AND NUMERIC VALUES IN ST PROGRAMS

3.2 Data Handling

3.2.1 Data types

3 - 3
In ST programs, the types of used data have been defined.
Sections 3.2 and 3.3 indicate the data types and their representation methods in ST
programs.
The following data types can be used in ST programs.
Data Type Definition
BOOL Boolean type
INT Integer type
DINT Double precision
integer type
REAL Real number type
STRING Character string
type
ARRAY Array data type
STRUCT Structured data type
*1: K0, K1, H0 and H1 for specification of K and H cannot be used as the BOOL type.
Precautions when an operation result exceeds the data type range
When an operation result exceeds the data type range, correct result cannot
be obtained.
Range
* 1
TRUE•FALSE,1•0
-32768 to 32767
-2147483648 to
2147483647
+38
-3.402823 to
-38
-1.175495 , 0.0,
-38
+1.175495 to
+38
+3.402823
Up to 50 characters
can be defined.
Depends on the data
type of the specified
element.
Depends on the data
type of the specified
element.
Type in C
Type in Ladder
Language
Bit bool
Word signed short
Double word signed long
Real number float
Character string char
Array char[ ], etc.
Structure struct
3 - 3