Rockwell Automation 5370-CVIM2 Module - Manual (Page 364)

Chapter 7
Inspection Tools
7–126
or –– The “ or ” logic operator is inserted between two or more expressions
(such as inspection results values) in a formula. If the value of any one
expression (“input”) is logic “1” (or non–zero), the result of the logic
operation (“output”) will be a logic “1.” If all inputs are zero, however, the
output of the formula will be a logic “0.”
In a simple example, the results from three tools are “ored” together in a
formula as follows:
{Tool1.Fail High}or{Tool2.Fail Low}or{Tool3.Warn Low}
These tool results will each yield a logic “1” when the “fail” or “warn” range
limit for the corresponding tool is exceeded. The formula will yield a logic
“1” when any one of the three tools yields a logic “1.”
In another example, such as the following . . .
{Tool1}or{Tool2}
. . . Tool 1 could be an object–counting window tool returning a count of 0,
and Tool 2 could be a gage tool returning an X–axis value of 156.000 pixels.
Since at least one of these inputs is non–zero, the formula in this case will
output a logic “1” result.
xor –– The “ xor ” (exclusive “ or ”) logic operator is inserted between two
expressions (such as inspection results values) in a formula. If the values of
the expressions (“inputs”) on both sides of the “
xor ” operator are non–zero,
the result (“output”) of the logic operation will be a logic “0.” If only one
input is non–zero, the output will be a logic “1.” If both inputs are zero, the
output will be a logic “0.”
In this example, if Tool 2 is an object–counting window tool returning a
count of 8 and Tool 3 is a gage tool returning a linear measurement of
312.000 pixels, this “ xor ” formula will output a logic “0” result, since both
of the inputs are non–zero.
In a simple example, the results from two tools are “xored” together in a
formula as follows:
{Tool1.Fail High}xor{Tool2.Fail High}
These tool results will each yield a logic “1” when the “fail high” range limit
for either tool is exceeded. The formula will yield a logic “1” when one of
the two tools yields a logic “1.” If both tools yield logic “1” or “0,” the
formula will yield a logic “0.”