SIS function blocks > SIS Math Blocks > Logic Solver Calculation function block > Expressions in DeltaV SIS Software

Operators in Logic Solver Expression

The Logic Solver Calc/Logic block supports the following operators:

Unary Operators

Operator Type

Example

unary minus (change sign)

-'a'

unary plus

+'a'

logical not

!'a' or NOT 'a'

bitwise not

~'a'

Binary Operators

Operator Type

Example

logical or

'a' OR 'b'

logical exclusive or

'a' XOR 'b'

logical and

'a' AND 'b'

bitwise or

'a' | 'b'

bitwise exclusive or

'a' ^ 'b'

bitwise and

'a' & 'b'

equals comparison

'a' = 'b'

not equals comparison

'a' <> 'b' or

'a' != 'b' or

'a' ~= 'b'

less than comparison

'a' < 'b'

greater than comparison

'a' > 'b'

less than or equal to comparison

'a' <= 'b'

greater than or equal to comparison

'a' => 'b'

addition

'a' + 'b'

subtraction

'a' - 'b'

multiply

'a' * 'b'

divide

'a' / 'b'

modulus (remainder)

'a' MOD 'b' or

'a' % 'b'

power

'a' ** 'b'

Conditional Operator

The conditional operator (?) evaluates one of two expressions, depending on the value of a condition. The syntax for using the operator is

condition?[expression1]:[expression2]

For example, the condition out1:=(in1=1)?in2:in3 means if in1 is equal to 1 then out1 is set to the value of in2, if in1 is NOT equal to 1 out1 is set to the value of in3.