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Function Blocks
4AND Function Block
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HC900 Hybrid Control Designer Function Block Reference Guide
Revision 11
2/07
Block properties
Double click on the function block to access the function block properties dialog box.
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”
on Icon next to inverted input).
ATTENTION
Unused values must be set to 1 or inverted.
Example
H
Figure 16 shows a Function Block Diagram configuration using a 4AND function block. The function
block is being used to monitor 3 input signals for an alarm condition. Note unused input is terminated.
Figure 16 4AND function block example