
U90 Ladder Software Manual
176
OR
The OR logic function block can evaluate the state of two integers to see if either input A or
B is true. If input A OR B is true - the output C will be true (logic 1). If both input A and B are
true (logic 1) - the output C will also be true (logic 1).
Input Operands A & B must be integer values: MI , SI or # constant integer value.
Output Operand C may be a Memory Integer or a System Integer.
XOR
The XOR logic function block can evaluate the state of two integers to see if input A and B
are equal. If either input A OR B is true - the output C will be true (logic 1). If both input A
and B are true (logic 1) - the output C will be false (logic 0). If both input A and B are false
(logic 0) - the output C will be false (logic 0).
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