Instruction manual

890USE18300 September 2003 41
2
Boolean Reflex Blocks
At a Glance
Overview This chapter describes three Boolean logic reflex blocks—an exclusive-OR (XOR)
and two logical ANDs. XOR blocks operate on two input values; AND blocks can
operate on either two or three inputs. Because the software allows you to invert the
results of these blocks and sometimes their operational inputs, several variations of
the three block types are supported.
What’s in this
Chapter?
This chapter contains the following topics:
Topic Page
Two-input AND Blocks 42
XOR Blocks 46
Three-input AND Blocks 48