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ControlMaster CM10, CM30 and CM50
Universal process controllers,
1
/
8
,
1
/
4
and
1
/
2
DIN
7 Advanced Level
80
IM/CM/S–EN Rev. R
7.7 Functions
Contains parameters for setting up the math block(s), logic equations and timer functions within the
controller.
Logic Equations
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.
*2 Logic equations are required to perform an exclusive OR of 3 inputs
Menu
Functions
OR, AND
NOR, NAND
EXOR, END
OR, AND
NOR, NAND
EXOR, END
OR, AND
NOR, NAND
EXOR, END
OR, AND
NOR, NAND
EXOR, END
Operand 1
Operand 2
Operand 3
Operand 4
Operand 5
Operator 1
Operator 2
Operator 3
Operator 4
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
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
is 1 if one input is 1 and the other is 0
END
Terminates the equation.