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Standard function blocks
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02/16 MN05013001Z EN
BV, Boolean operation
The function block enables the values to be combined in
Boolean (logic) operations. It has the following functions:
• Masking out of particular bits from values,
• Bit pattern recognition,
• Bit pattern modification.
easySafety allows the use of up to 16 Boolean operations.
Function block
Figure 81:
Boolean operation function block
a
Inputs BV..I1 and BV..I2: The data block at input I1 is compared
with the value at I2.
b
Contact BV..ZE: Closes if operation result equals zero.
c
Output BV..QV: Outputs the operation result.
Wiring of the function block
You wire the function block in the standard circuit diagram
with its contact. Example of a function block for Boolean
operation:
Figure 82:
Wiring of the contact to marker
BV...
>I1
>I2
QV>
ZE
DW
DW
DW
a
b
c
BV01ZE------------------------
Ä
M 48
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