ABB ControlMaster CM30 - Functions

ControlMaster CM30, CM50 and CMF310
Universal process controllers,
1
/4,
1
/2 DIN and fieldmount 7 Advanced Level
76 IM/CM/ED–EN Rev. X
7.8 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 equation can combine a maximum of 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 and 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.
Setting an operator to END terminates the equation.
Notes. 2 Logic equations are required to perform an exclusive OR of 3 inputs.
As part of the cascade template, logic equation 1 is preconfigured.
Changes to this equation will result in the cascade template not functioning correctly.
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
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.
Equation Number Selects the logic equation (1 to 8) to be configured.
Operand 1 (8) See Appendix A, page 104 for description of sources.
Invert 1 (8) Logically inverts (applies NOT function to) the digital signal.
For example, if the digital signal assigned to the operand has a state of '1' it is inverted to a
state of '0' before being applied to the equation.
Operator1 (7) Selects the operator type (OR, AND, NOR, NAND, EXOR). Select END if no more elements
are required.
Menu
Functions
Exit
Select
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