Rockwell Automation 9301 Series RSView32 Users Guide - Manual (Page 534)

Creating expressions
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14–21
If you want an expression containing these functions to be evaluated
more than once, assign the expression to an event rather than to an
object in a graphic display.
Math functions
These functions perform math on an expression:
FREE_BYTES(drive) The number of bytes
free on the specified
drive. FREE_BYTES(c)
returns the number of bytes available on
drive C, up to a maximum of 2.1 GB.
Use this function to display a message or
trigger an alarm when disk space is
getting low.
This function Returns this value Example
This function Returns this value
SQRT (expression) The square root of the expression
LOG (expression) The natural log of the expression
LOG10 (expression) The base ten log of the expression
SIN (expression) The sine of the expression in radians
COS (expression) The cosine of the expression in radians
TAN (expression) The tangent of the expression in radians
ARCSIN (expression) The arc sine of the expression in radians
ARCCOS (expression) The arc cosine of the expression in radians
ARCTAN (expression) The arc tangent of the expression in radians
SIND (expression) The sine of the expression in degrees
COSD (expression) The cosine of the expression in degrees
TAND (expression) The tangent of the expression in degrees
ARCSIND (expression) The arc sine of the expression in degrees