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α
2 Simple Application Controllers
6.3
Boolean block
The function block creates a logical operation using Boolean algebra consisting of AND, OR,
XOR and NOT gates. It is possible to express the Logic functions in the form of an equation.
Refer to Chapter 5 for detailed information concerning Boolean Logic operation.
Table 6.3: Boolean Function Block
Function
1
0 0
0
2
P
3
B
L
4
Table 6.4: Boolean expressional data
Item
AND
OR
XOR
NOT
(
)
1
2
3
4
O
=
1 ) Boolean Operation
1
2
3
Set Item
1,2,3,4
Numbered Input pins for boolean operation to control
FB
User-defined logical boolean operation
O
The output is controlled directly from the result of the boolean
Output
operation involving the numbered input pins 1,2,3,4.
Display
∗
Intersection
+
Disjunction
^
XOR
!
NOT
(
Left parenthesis
)
Right parenthesis
1
Signal connected to Input pin 1
2
Signal connected to Input pin 2
3
Signal connected to Input pin 3
4
Signal connected to Input pin 4
O
Output signal
=
Equal sign signal
01
1
Output
2
3
O = 1
BL
Description
Description
2 + 3
*
AND OR
Function Blocks 6
6 - 9
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