Operators
Below we provide a description of the operators that can be used in the formulas.
Logical operations:
Table: Logical operations of the programmable controller
| < | Returns the value 1 if the value to the left of the operator is smaller than the value to the right of the operator. Otherwise, the returned value is 0. |
| <= | Returns the value 1 if the value to the left of the operator is smaller than or equal to the value to the right of the operator. Otherwise, the returned value is 0. |
| > | Returns the value 1 if the value to the left of the operator is larger than the value to the right of the operator. Otherwise, the returned value is 0. |
| >= | Returns the value 1 if the value to the left of the operator is larger than or equal to the value to the right of the operator. Otherwise, the returned value is 0. |
| = | Returns the value 1 if the value to the left of the operator is equal to the value to the right of the operator. Otherwise, the returned value is 0. |
| <> | Returns the value 1 if the value to the left of the operator is not equal to the value to the right of the operator. Otherwise, the returned value is 0. |
| AND | Returns the value 1 if the value to the left and right of the operator is 1. Otherwise, the returned value is 0. |
| OR | Returns the value 1 if the value to the left or right of the operator is 1. Otherwise, the returned value is 0. |
| NOT | Returns the value 1 if the value to the right of the operator is 0. Otherwise, the returned value is 0. |
Mathematical operations:
| + | Returns a value which is the sum of the values to the left and right of the operator. |
| – | Returns a value which is the difference between the values to the left and right of the operator. |
| / | Returns a value which is the quotient of the values to the left and right of the operator. |
| * | Returns a value which is the product of the values to the left and right of the operator. |
| % | Returns a value which is the integer quotient of the values to the left and right of the operator. |
| ^ | Returns a value which is the power of the values to the left and right of the operator. |
Expressions can be grouped and evaluated before others using brackets “( … )“. The formulas are evaluated in the following order:
- ^
- * , /, %
- +, –
- <, , >, <=, >=, <>
- =
- NOT
- AND
- OR