Operators In St Language - Mitsubishi Electric MELSEC Q Series Structured Programming Manual

5.1.2

Operators in ST language

The following table shows the operators used in the ST program and their priorities.
Operator
( ) Parenthesized expression
Function ( ) Function (Parameter list)
** Exponentiation
NOT Logical negation
* Multiplication
/ Division
MOD Modulus operation
+ Addition
- Subtraction
<, >, <=, => Comparison
= Equality
<> Inequality
AND, & Logical AND
XOR Exclusive OR
OR Logical OR
If a syntax includes multiple operators with a same priority, the operation is performed from the
leftmost operator.
The following table shows the operators, applicable data types, and operation result data types.
Operator
*, /, +, -
<, >, <=, >=, =, <>
MOD
AND, &, XOR, OR, NOT
**
Table 5.1.2-1 Operators in the ST language
Description
(1+2)*(3+4)
ADD_E(bo01, in01, in02, in03)
re01:= 2.0 ** 4.4
NOT bo01
3 * 4
12 / 3
13 MOD 3
in01 + in02
in01 - in02
in01 < in02
in01 = in02
in01 <> in02
bo01 & bo02
bo01 XOR bo02
bo01 OR bo02
Table 5.1.2-2 Data types used in operators
Applicable data type
ANY_NUM
ANY_SIMPLE
ANY_INT
ANY_BIT
ANY_REAL (Base)
ANY_NUM (Exponent)
Example
Operation result data type
ANY_NUM
Bit
ANY_INT
ANY_BIT
ANY_REAL
5.1 ST
5.1.2 Operators in ST language
Priority
Highest
Lowest
5
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