WinAQMS Mini DAS User manual 1.0 Edit Menu
29
will be replaced with the number in Test Value. The results of the calculations are
reported in the text box at the right. If there was an error produced when a calculation
was
performed
then
the
result
tex
t
box
will
include
a
line
similar
to
<Problem
found
with calculation for channel value of X>.
The following operators and functions can be used:
Arithmetic operators: +, -, *, /, and brackets ().
Logical operators: =, < (less than), > (greater than), <> (not equal), >= (greater than or
equal), <= (less than or equal), NOT, AND and OR which all evaluate to –1 if true or
0 if false.
Trigonometric operators: SIN, COS, TAN and ATN which have radian operands and
results.
Mathematical operators: SQR (square root), EXP (natural exponent), LOG (natural
log) and ^ (power). The constant for NULL can be included in a calculation.
WinAQMS Mini DAS evaluates NULL to a numerical value (-
1.79769313486231E+308) that it recognises as a NULL data reading.
Example: if you want a channel to have a result of 10 if channel 22 is under 800 units
or over 900 units and a value of 5 if channel 22 is between 800 and 900 units, then
you would use a calculation like the following.
-10 * ((C22 < 800) OR (C22 > 900)) -5 * ((C22 >= 800) AND (C22 <= 900))
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