Boolean Block - Mitsubishi Electric a2 Series Programming Manual

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2 Simple Application Controllers
6.3

Boolean block

The function block creates a logical operation using Boolean algebra consisting of AND, OR,
NAND, 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 - 7