ABB ControlMaster CMF160 - Page 65

ControlMaster CM15 and CMF160
Universal process indicator
1
/8 DIN 7 Advanced Level
IM/CM/I–EN Rev. P 63
…Functions / …Math Blocks / …Block Type
Equation Enables an equation with up to 4 operands and 3 operators to be created. The operands can be
assigned to any analog or digital signal (see Appendix A, page 94). Digital signals have a value of
either '0' or '1'. With the exception of the Median operator, the equation is processed in a strict
left to right order, with no operator precedence.
The result of a math block can be used as the operand in another math block, enabling more
complex math equations to be constructed.
The math blocks are processed in ascending order; Math block 1 is processed first, then Math
Block 2, then 3 to 8:
Operand 1
Operator 1
Add, Subtract
Multiply, Divide
Low Select
High Select
Operator 2
Add, Subtract
Multiply, Divide
Low Select
High Select
Add, Subtract
Multiply, Divide
Low Select
High Select
Operator 3
Operand 2
Operand 3
Operand 4