I2773-4.
4
en
131
Somat eDAQ
lite
Desk Calculator Expression
Build the Desk Calculator expression using keyboard entry or by double clicking an
input channel or operation to add it to the expression. Syntax for the Desk Calculator
expression is modeled after the standard C programming language and follows the
same operator precedence rules. All operators and referenced input channels are
case sensitive. Operand data type consistency is strictly enforced in the parsing of the
Desk Calculator expression operators. TCE warns of any syntax errors it detects after
clicking OK.
Floating point exceptions can occur with the misuse of certain Desk Calculator
operators such as taking the square root or logarithm of a negative number. When
detecting these exceptions, the eDAQ
lite
sets the MathException status flag. The
results of such operations are usually some form of IEEE NAN (not a number).
Category
Operator
Syntax
Return
Arithmetic
abs
abs(
a
)
The absolute value of
a
.
sqrt
sqrt(
a
)
The square root of
a
.
log
log(
a
)
The natural logarithm of
a
.
log10
log10(
a
)
The base-10 logarithm of
a
.
exp
exp(
a
)
The exponential function of
a
.
sgn
sgn(
a
)
-1 for
a
< 0, 1 for
a
> 0 and 0 for a = 0.
float
float(
a
)
a
in floating point data type.
round
round(
a
)
The nearest integer to
a
.
floor
floor(
a
)
The largest integer less than
a
.
ceil
ceil(
a
)
The smallest integer greater than
a
.
^
a
^
b
a
raised to the power of
b
.
*
a
*
b
The product of
a
and
b
.
/
a
/
b
The quotient of
a
and
b
.
%
a
%
b
The modulus of
a
and
b
.
+
a
+
b
The sum of
a
and
b
.
-
a
-
b
The difference of
a
and
b
.
Trigonometric
(all angles in radians)
sin
sin(
a
)
The sine of
a
.
cos
cos(
a
)
The cosine of
a
.
tan
tan(
a
)
The tangent of
a
.
asin
asin(
a
)
The arcsine of
a
in the range [-PI/2, PI/2].
acos
acos(
a
)
The arccosine of
a
in the range [0, PI].
atan
atan(
a
)
The arctangent of
a
in the range [-PI/2, PI/2].
HBM: public
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