Functions - ABB ControlMaster CM15 User Manual

ControlMaster CM15
Universal process indicator

7.6 Functions

Menu Contains parameters for setting up the math block(s), logic equations and timer functions within the
Select
Functions
indicator.
Select
Logic Equations
Operator 1
Operand 1
OR, AND
NOR, NAND
Operand 2
EXOR, END
Operand 3
Operand 4
Operand 5
*2 Logic equations are required to perform an exclusive OR of 3 inputs
IM/CM/I–EN Rev. D
1
/ DIN
8
Up to 8 logic equations can be configured. Each can combine up to 8 operands (digital signals)
with 7 operators. The elements of each equation are calculated sequentially. Operand 1, Operator
1 and Operand 2 are evaluated first. The result is combined with Operator 2 and Operand 3. This
result is then combined with the next operator and operand and so on to the end of the equation.
Note. If any of the operand sources are invalid (for example, an alarm that is not configured), the logic
equation output state is zero and invalid.
Operator 2
OR, AND
NOR, NAND
Operator 3
EXOR, END
OR, AND
NOR, NAND
EXOR, END
Key:
OR* Output is 1 if either or both inputs are 1; output is 0 if both
inputs are 0
AND Output is 1 if both inputs are 1; output is 0 if either input is 0
NOR Output is 0 if either or both inputs are 1; output is 1 if both
inputs are 0
Operator 4
NAND Output is 0 if both inputs are 1; output is 1 if either input is 0
EXOR Output is 0 if both inputs are 0 or both inputs are 1; output
OR, AND
NOR, NAND
is 1 if one input is 1 and the other is 0
EXOR, END
END Terminates the equation.
7 Advanced Level
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