HEIDENHAIN TNC 410 ISO Programming - Manual (Page 374)

348 10 Programming: Q Parameters
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Arc tangent
Inverse of the tangent. Determine the angle from the
ratio of the opposite to the adjacent side.
Example: Q12 = ATAN Q50
Powers of values
Example: Q15 = 3^3
Constant “pi” (3.14159)
Example: Q15 = PI
Natural logarithm (LN) of a number
Base 2.7183
Example: Q15 = LN Q11
Logarithm of a number, base 10
Example: Q33 = LOG Q22
Exponential function, 2.7183 to the power of n
Example: Q1 = EXP Q12
Negate (multiplication by -1)
Example: Q2 = NEG Q1
Truncate decimal places
(form an integer)
Example: Q3 = INT Q42
Absolute value of a number
Example: Q4 = ABS Q22
Truncate places before the decimal point
(form a fraction)
Example: Q5 = FRAC Q23
Check algebraic sign of a number
(not TNC 426, TNC 430)
Example: Q12 = SGN Q50
If result for Q12= 1: Q50 >= 0
If result for Q12= 0: Q50 < 0
Logic command Soft key