Rockwell Automation 8520 9/Series CNC Lathe - Manual (Page 28)

Basic Control Operation
Chapter 2
2-6
Example 2.1
Mathematic Expressions
Expression Entered Result Displayed
12/4*3 9
12/[4*3] 1
12+2/2 13
[12+2]/2 7
12-4+3 11
12-[4+3] 5
Table 2.C lists the function commands available with the
[CALC]
key.
Table 2.C
Mathematical Functions
Function Meaning
SIN Sine (degrees)
COS Cosine (degrees)
TAN Tangent (degrees)
ATAN Arc Tangent (degrees)
ASIN Arc Sine (degrees)
ACOS Arc Cosine (degrees)
SQRT Square Root
ABS Absolute Value
BIN Conversion from Decimal to Coded Decimal
BCD Conversion from Coded Decimal to Decimal
ROUND Rounding Off (nearest whole number)
FIX Truncation Down
FUP Truncation Up
LN Logarithms (natural log)
EXP Exponent
When you program these functions, place the value that the function is to
be performed on in brackets, for example, SIN [10]. The exception to this
is the arc tangent function. The format for ATAN requires the division of
two values. For example, ATAN [10]/[2] is used to calculate the arc
tangent of 5.
The functions in Table 2.C are executed from left to right in a program
block. These functions are executed before the control executes any
mathematical operators like addition or subtraction. This order of
execution can only be changed by enclosing operations in brackets [ ].
Operations enclosed in brackets are executed first.