Function Blocks
4OR Function Block
Revision 11 HC900 Hybrid Control Designer Function Block Reference Guide 245
2/07
4OR Function Block
Description
The 4OR label stands for the inclusive OR (4 Inputs) Boolean logic function.
This block is part of the
Logic and Fast Logic categories.
Function
Turns digital output (OUT) OFF when inputs X1 through X4 are OFF. Thus,
• If input X1 or X2 or X3 or X4 is ON, then: OUT = ON.
• If all inputs are OFF, then: OUT = OFF.
Input
X1
= First digital signal
X2 = Second digital signal
X3 = Third digital signal
X4 = Fourth digital signal
Output
OUT
= Digital signal controlled by status of input signals
Block properties
Double click on the function block to access the function block properties dialog box.
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