Function Blocks 
4OR Function Block 
246    HC900 Hybrid Control Designer Function Block Reference Guide  Revision 11 
  2/07 
Input state 
You can invert Input 1, 2, 3, 4, or all. If the input is inverted, an input line that is ON is seen as OFF. (“N” 
appears on the Icon next to the inverted input.) 
 
 
 
 
 
ATTENTION 
Unused Inputs default to 0. 
 
Example 
HFigure 65 shows a Function Block Diagram using a 4OR function block.  
Output = X1 or X2 or X3 or 
X4  
 
 
 
Figure 65  4OR function block example